Answer:
According to me the answer is a
Explanation:
It's because seawater isn't good for planting crops. It destroys crop because of it's salinity. Therefore the seawater irrigation kills the plants while the light irrigation produces few beans. Because the farmer captures rain water in special traps.
Salinization from seawater irrigation hinders plant growth, while fresh rainwater irrigation supports crop productivity.
Salinization is a common problem in arid climates where irrigation with seawater can lead to the accumulation of salts in the soil, hindering plant growth. Conversely, irrigation with fresh rainwater helps prevent salinization and supports crop productivity by providing non-saline water.
What percentage of Earth's water is fresh water? Which of the following contrasts between confined and unconfined aquifers is correct?
Answer:
Question 1. The percentage is 3%.
Question 2. Only confined aquifers can produce artesian wells.
Explanation:
The remaining 97% of water is saline and ocean-based, thus, not adequate for consumption. And with from that small 3%, only about 1% is accessible to us, because the rest is located in glaciers and snowfields.
Regarding the second question, for an artesian well to form, a confined aquifer must exist. A confined aquifer stores groundwater under positive pressure, caused by layers of impermeable rocks. Any well drilled into the confined aquifer is called an artesian well.
Answer:
Ans to first question: 3 percent of the water is fresh
Ans to second question: Only confined aquifers can produce artisan wells
Explanation:
The earth is largely covered by water, upto 70 percent, and only about 3 percent of the entire water is fresh, which can be used for agricultural purposes or for other domestic uses. Only 1 percent of this fresh water portion is easily reached by us while the remaining portion are found in snowfields and glaciers.
The remaining water portion are deemed saline.
Artesian well are wells with its water being under pressure and can be said to flow to the surface naturally without being pumped. Only confined aquifers can produce artisan wells
Plants such as leafy spurge can double their population size every year in part because of their efficient production of large amounts of seeds. Populations that can double every year, such as leafy spurge,
a. will do so endlessly, eventually achieving a global distribution.
b. are examples of logistic growth.
c. probably have more predators than other species.
d. exhibit exponential growth as they spread to new regions. Group of answer choices
Answer:
Option D is correct.
Explanation:
Euphorbia esula is commonly known as leafy spurge, it's a creeping perennial native from central Europe, and most of north Asia.
The leafy spurge has deep roots, that store vital nutrients that allow the plant to recover from most control efforts.
Each plant can produce around 140 seeds per flowering shoot, these seeds are then expelled up to 15 ft. They can subsist up to 8 years in the soil.
This allows the plant to grow exponentially as it infests new regions.
The term blanching, used to describe localized cold injury, means the tissue has turned to which of the following colors?
A. Blue or purple
B. White or lighter
C. Red
D. Black
The correct answer is B. White or lighter.
Explanation
Blanching occurs as tissue turns white or has a lighter color as a result of inappropriate blood flow. One of the main causes of blanching is lesions produced by cold as low temperatures produce reduced blood flue and therefore, this lesion produces blanching. This has symptoms such as tingling sensation, numbness, and even issues to move the limb or part of the body that has been exposed to cold. Additionally, this lesion should be treated by using external heating; although, in severe cases, the tissue might be irreversibly affected. So, the correct answer is B. White or lighter
physically breaks rocks into smaller pieces. __________ changes the surface of rocks into new substances
Answer:
mechanical weathering
Explanation:
As a definition, mechanical weathering is the disintegration and decomposition of rocks on or on the earth's surface produced by different atmospheric, climatic and biological agents.
Weathering is a permanent process in nature.
It is also defined as a static process by which the rock breaks into small fragments, dissolving and decomposing to form new minerals. This is the way in which the removal and transport of detritus then results in erosion. It follows that weathering, by reducing the consistency of the stone masses leads to the erosion process.
The causative agents of the weathering of the stones, (external geological agents) can be physical (mechanical), chemical and biological.
Why were Europeans eager to create supranational organizations after WW2?
Answer: To prevent future wars and check the growth of communism
Explanation:
In a supranational organization, the ability of nations to affect decisions goes beyond the limit of their nation's borders, they act as a part of a larger body aiming to achieve a common goal for all its members. The European Union and the African Union are examples of supranational organizations.
These organizations create a uniting force between member countries through trade, environmental protection or food production practices, thereby, preventing war and diverging ideas contrary to the shared value of the group such as communism, which was a threat to nations immediately after World War II.
Post World War II, Europeans aimed to create supranational organizations like the United Nations, NATO, and the European Union to ensure international peace, create stability, deter aggression, and closely tie their economies to prevent further wars.
Explanation:After World War II, Europeans were eager to create supranational organizations such as the United Nations and the North Atlantic Treaty Organization (NATO) to ensure international peace and stability and deter any aggressive actions like those that had led to two devastating world wars.
In addition, the formation of the European Union (EU) served as a means to tie European economies more closely together, with the aim of preventing another devastating war. The EU started with a free trade association, evolved into a common market, and then transformed into a full economic union. It introduced a common currency, the euro, and phased out most of the former national forms of money, a clear illustration of the scope and success of these post-WWII supranational institutions.
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The invention of __________________ made it easier to see that there were actually more bodies within the universe than was originally thought.
Answer:
The invention of the telescope made it easier to see that there were actually more bodies within the universe than was originally thought.
Explanation:
This is because telescopes allowed us to see bodies within the universe that couldn't be seen with naked eye. This improved significantly our understanding of Earth's place in the cosmos and sparked the beginning of a revolution in the field of Physics.
Answer:
telescope
Explanation:
Traveling southward from the Arctic regions of Canada to the tropics of Panama, one passes through several biomes - tundra, coniferous forest, temperate deciduous forest, and tropical rain forest. This pattern of change in vegetation is primarily the result ofa. Primary and secondary successionb. An increase in both mean annual temperature and mean annual precipitation c. An increase in the total annual hours of sunlightd. The invasion of exotic species
Answer:
Explanation:
This pattern of change in vegetation is primarily the result of because an increase in both mean annual temperature and mean annual precipitation.The vegetation changes with changes in temperature from traveling southward from the Arctic regions of Canada to the tropics of Panama, Temperature and the precipitation both increase which is better from vegetation growth.
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Considering the question above, this pattern of change in vegetation is primarily the result of an "increase in both mean annual temperature and mean annual precipitation."
This is because the annual temperature is defined by the amount of sunlight, while annual precipitation is defined by the amount of rainfall.Both rainfall and sunlight are the primary agents of vegetation.Therefore, an increase in both rainfall and sunlight throughout the year will affect the vegetation.Hence, in this case, the correct answer is option B "An increase in both mean annual temperature and mean annual precipitation"
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What is the name of one wind system you can use to travel around Earth?
Answer:
a sailboat?
Explanation:
You can sail a ship around this world even against the wind using wind energy. By picking up speed using wind then use kinetic energy gained to sail against the wind direction. So, yes, even with one wind direction we can sail the globe both ways.
Answer:
geotropic wind.
Explanation:
There are winds because there are differences in pressures. The direction of wind is also affected by coriolis affect. Due to Coriolis Force, the wind flowing from equator towards the North Pole and from North Pole towards the equator are deflected to their right while the winds flowing north-south and south-north in the southern hemisphere are deflected towards their left. The magnitude of the deflection, or “Coriolis effect,” varies significantly with latitude. The Coriolis Effect is zero at the equator and increases to a maximum at the poles. The effect is proportional to wind speed; that is, deflection increases as wind strengthens. The resultant balance between the pressure force and the Coriolis force is such that, in the absence of surface friction, air moves parallel to isobars (lines of equal pressure). This is called the geotropic wind.
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Most hot deserts ________.
A. retain their high temperatures throughout the night because there is no vegetation to absorb heat from the sediment at the surface
B. cool off greatly at night because of sparse vegetation, dry air, and little cloud cover
C. cool off by no more than 8°C on most nights
D. gain additional heat at night because the desert air rises
B) deserts are hot in the morning and freezing at night
Most hot deserts cool off greatly at night because of sparse vegetation, dry air, and little cloud cover.
Hence, the correct answer is option b.
Hot deserts experience significant cooling at night due to specific factors. Sparse vegetation fails to retain heat, allowing it to escape rapidly into the atmosphere during clear nights. Dry air does not hold heat well, promoting efficient cooling through radiative heat loss. Additionally, without cloud cover, heat that accumulated during the day can efficiently radiate back into space.
As a result, desert temperatures drop drastically, creating a stark contrast between day and night. This extreme diurnal temperature variation can lead to freezing nights, despite scorching daytime temperatures. Such conditions pose unique challenges to desert-adapted flora and fauna, shaping their survival strategies and making these ecosystems distinct from other biomes on Earth.
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Oil shale is permeated with an organic material that has not yet converted to oil called ____________________
Answer: Kerogen
Explanation: a Kerogen is an organic substances that helps to permeate (has pores which allow the inflow and outflow of certain substances like air or watee)oil shells, Kerogen has not net been converted to oil.Kerogens are waxy in nature with complex structures,Kerogens can not be extracted using organic Kerogens also contain Sulfur and Nitrogen. Kerogen contains Hydrocarbons in the form of paraffin which disolves under high temperatures and pressure into substances similar to petroleum.
What is the northernmost capital of continental europe?
Answer:
Helsinki
Explanation:
Following are a number of distinguishing characteristics of spiral and elliptical galaxies. Match each characteristic to the appropriate galaxy type.
1. have a flattened disk of stars
2. are rare in central regions of galaxy clusters
3. contain many bright, hot stars
4. are more reddish in color5. contain primarily old, low-mass stars
6. contain abundant clouds of cool gas and dust
7. have significant, ongoing star formation
Answer:
1. have a flattened disk of stars --- spiral galaxies.2. are rare in central regions of galaxy clusters --- spiral galaxies.3. contain many bright, hot stars --- Spiral galaxies.4. are more reddish in color --- Elliptical galaxies.5. contain primarily old, low-mass stars --- Elliptical galaxies.6. contain abundant clouds of cool gas and dust --- Spiral galaxies.7. have significant, ongoing star formation --- Spiral galaxiesExplanation:
Most galaxies that contain a central bulge that is surrounded by a rotating disk of arms that circles the galaxies are said to be a spiral galaxy. About 60% of the galaxies are made up of spiral shapes and they are mostly found n low-density regions and are in the central of the galaxy clusters. Spiral galaxies often have beautifully shaped made form hot and young stars. The more reddish in color indicates much older galaxies and are resemble that of an elliptical shape. Also, they consist of a little amount of dust and gas left. Spiral galaxy has rich gas and high star formations.On the average, more than half of the oil in a reservoir is left behind after a well has "gone dry," using primary recovery techniques.
A) True
B) False
Answer:
A) True
Explanation:
As the primary recovery technique is a method of gas drive and is the first stage of petroleum and gas production and relies on due to the natural rise of pressure between the fields and bottom hole of the well. It is a less expensive than an advanced system of oil recovery and forces the oil to the surface.When large supercooled water droplets (SLD) are present in temperatures below +5°C, outside air temperature, what type of icing would be expected to form?
Answer:
ice that is glossy, clear, or translucent
Explanation:
A substance is seen can see clear or transparent when visible light can pass through it without being absorbed, reflected or dispersed too much. Water absorbs some wavelengths of light, but mainly non-visible light. For example, if our eyes allowed us to see ultraviolet wavelengths, then the water would not be transparent. This explains why liquid water is clear, but then why is ice not? Except in high-level bars and cocktail bars, where the cubes seem to be carved out of glass, it is difficult for mere mortals to remove a piece from the freezer that does not have something opaque or cloudy.
Because the ice cubes we make usually come from tap water, there are many "impurities" there. When the water begins to freeze, these and the air bubbles "run away" to the liquid that has not yet frozen. Therefore, the opaque part is always where the water freezes later (sometimes it occurs at the bottom, depending on the freezer). And, since light cannot travel in a straight line through ice due to impurities, it appears cloudy.
To create ice cubes of crystalline category, the key is to freeze the water very slowly so that the impurities and the air bubble have the opportunity to rise to the surface and, in the case of air, escape. A slow freeze also allows larger ice crystals to form, which have few surfaces to scatter light. It is also a physical phenomenon when, for example, when large drops of supercooled water (SLD) are present at temperatures below + 5 ° C, transparent or translucent ice is also generated. Some also point out that it is convenient to boil water before, but this does not always work.
_____________ increase in fishing lead to overfishing and subsequent disappearance of sardine species in the Far Eastern sea.
Answer:
Explanation:
Excessive increase in fishing lead to overfishing and subsequent disappearance of sardine species in the Far Eastern sea.
If an Earthquake registered high on the Richter scale and low on the Mercalli scale, then it occurred most likely in which type of location?
Answer:
The Earthquake most likely occurred in a location where the seismic wave or the energy released causing the earthquake to happen and the magnitude of the earthquake is high but the observed effects of the earthquake and its intensity is low.
Explanation:
In order to get a good understanding of the answer above we have to get familiar with some terms and concepts. The first term we would consider is the magnitude of an Earthquake, according to Earthquake Glossary,
The magnitude of an earthquake is a number that characterizes the relative size of an earthquake. Magnitude is based on measurement of the maximum motion of an earthquake seismic waves (waves produced by an earthquake that travels through the Earth's layers) recorded by a seismograph.
We also need to understand the term Intensity of an Earthquake which is the number (written as a Roman numeral) describing the severity of an earthquake in terms of its effects on the earth's surface and on humans and their structures.
Finally we have to understand that, the Mercalli scale bases its measurement on the observed effects of the earthquake and describes its intensity. It is a linear measurement. On the other hand, the Richter scale measures the seismic waves, or the energy released, causing the earthquake and describes the quake's magnitude. It is a logarithmic. For example, a magnitude 4 earthquake is 10 times as tense as a magnitude 3 earthquake. The calculation for the Mercalli scale is quantified from the observation of the earthquake's effect on the earth's surface. It is also based on the effect on humans, objects, and man-made structures.
Oceanic crust
a. has the same composition as continental crust.
b. is the same age as continental crust.
c. has not been sampled directly because it is too deep beneath the ocean.
d. is covered by a thin blanket of sediment that thickens away from the ridge axis.
Answer: D - is covered by a thin blanket of sediment that thickens away from the ridge axis.
Explanation: Oceanic Crust is the outermost layer of the lithosphere tectonic plates.
It is formed at sea level with dense rock which form distinct layers.
The oceanic crust is about 6km in thickness and it is composed of basaltic rock overlain by sediments and it is found under the ocean.
Oceanic crust is divided into upper oceanic crust and lower oceanic crust.
Environmental problems associated with geothermal energy include:________ a. water and noise pollution and devastation of caribou herds. b. air pollution, corrosion of pipes, and may be toxic to fish. c. killing of birds, noise pollution, and is very expensive. d. being non-renewable, smells, and has large volumes of waste water.
Answer:
b. air pollution, corrosion of pipes, and may be toxic to fish
Explanation:
Use of earth heat to generate electrical energy through geothermal power plants is known as geothermal energy. There are certain disadvantages associated with geothermal power generation. One such problems is air pollution. Steam from the Earth brings up heavy metals such as Sulfer, Radon Salts and toxic gases which pollute environment. In the process of energy production, hazardous sludge produced which contaminate soil and water. Due to presence of heavy metals it corrodes pipes. Geothermal plants should be constructed with utmost care otherwise it greatly impact on local environment.
Regarding Eastern Orthodox churches, how many separate churches are there, and which has the largest membership?
Answer:
There are 14 self-governing churches, and Romanian church has 20% of Eastern Orthodox Christians.
Explanation:
The Eastern Orthodox Church consists of multiple national churches with the Russian Orthodox Church having the largest membership. They are largely self-governing but united in theology, differing from Western Christianity and with no official communion with the Oriental Orthodox churches.
The Eastern Orthodox Church is made up of several national churches, including but not limited to the Greek Orthodox, Bulgarian Orthodox, Romanian Orthodox, Serbian Orthodox, and the Russian Orthodox Churches. Of these, the Russian Orthodox Church has the largest membership. These national churches are largely self-governing but are united in theology and worship. The Orthodox Church is distinctive from Western Christianity, which includes Roman Catholicism and Protestant denominations, and is known for its traditional practices and icons. The Eastern Orthodox Church and the Oriental Orthodox churches share full communion within their respective bodies but are not in official communion with each other. Furthermore, ongoing theological dialogues occur among various Orthodox churches and between Orthodox and some Western churches.
In countries like Estonia, there are multiple Orthodox jurisdictions, such as the Estonian Apostolic Orthodox Church and the Estonian Orthodox Church of the Moscow Patriarchate. The Eastern Orthodox Church has played an important role in the religious tradition of Byzantium and continues to be an important faith community today.
In comparison to most other liquids, the heat capacity of liquid water is ________.
A) a function of salinity
B) about the same as other liquids
C) related to solvent concentration
D) higher than other liquids
E) lower than other liquids
Answer:
D) higher than other liquids
Explanation:
As the ocean that is high heat capacity has salinity and they show an absorbing capacity and thus function of salinity and the heat is directly related and in comparison to that of the other liquids. As there is a decreasing effect on the heating capacity of the water that has a specific heat capacity of about 0.932 compared to that of pure water.The mixture of gravel, sand, and crushed stone called ______ is an extremely useful construction material.
Answer:
aggregate
Explanation:
Aggregate is a construction material mixture of gravel, sand, and crushed stone used extensively in concrete production. Concrete has been used for centuries and has become more predictable in the last 100 years. Specialized aggregate like sand is also crucial for glass making.
The mixture of gravel, sand, and crushed stone referred to within the question is known as aggregate, a key component in the production of concrete. Concrete is a construction material with a history stretching back to Roman times, where it was developed as a mixture that hardens over time and operates similarly to stone. This material is critical for its various uses in construction, from large projects like concrete dams to something as simple as filling a child's sandbox. Additionally, specialized forms of aggregate, like sand, is essential in industries like glass making, although higher purities are required for certain types of glass and electronics.
Oxygen-18 and oxygen-16 are useful in studying past climates because ________.
A. ozone formation and decay depend on the ratio of oxygen-18 to oxygen-16
B. both water and calcite contain oxygen
C. oxygen ratios are directly related to carbon dioxide (CO2) levels
D. more oxygen-18 is stored in glacial ice when temperatures drop
Answer:
B. both water and calcite contain oxygen.
Explanation:
water molecules are not equal some are substituted with a heavier counterpart,the standard Oxygen molecule can be substituted by the 18O and hydrogen by H2 given rise to H216O,HD16O and H118O they are termed isotopologues and gave different physical properties.First, over the ocean, the heavier isotopes are less likely to take part in the formation of moisture, leading to lower concentrations of the heavy isotopes in the clouds compared to the mean oceanic water isotopic composition (lower concentration means that the δ18O is more negative). Then, as the air masses move toward the poles, temperature decreases leading to precipitation (either liquid or solid). The heavier isotopes will be preferentially found in the condensed phase than the light ones, which depletes even more the cloud from its heavy isotopes. Finally, in remote areas of the Polar Regions, the isotopic content of the final precipitation results from successive precipitation events. Since, as we saw, the precipitation contents in each isotope are different, each successive precipitation event will have a different isotopic composition, with the final one having the least heavy isotopes – a process called distillation. At each step of the moisture’s path from ocean to cloud to precipitation, the isotopic fractionation is strongly influenced by temperature. This leads to a temperature signal in the isotopic composition of both vapour and precipitation
Segments of the oceanic ridge system that are gentler and less rugged in slope due to faster rates of seafloor spreading are called:
Answer:
Oceanic ridges and rises.
Explanation:
The divergence caused by the movement do the mid-oceanic ridges system and ongoing process of the seafloor spreading takes gentler and ore rugged forms and as a result of this there is a continuous spreading of the seafloor and rising of the ridges takes place and uplifting of the ocean floor due to the convective currents that comes from below.Which of the following is a commercially used method for harvesting trees and is most likely to lead to a fragmented landscape with serious impacts on biodiversity?
a. Selective cutting
b. Clear-cutting
c. Shelter-wood cutting
d. Slash and burn clearing
e. Gleaning
Answer: b. Clear-cutting
Explanation: Clear cutting is a cheap and effective way of harvesting trees or timbers, this methods helps the forest operators to get the best out of a forest at a very reduced cost.
Clear-cutting is bad because removing the whole tree from an area destroys outrightly the natural habitat of most widelife, and it will also lead to the destruction of the eco-system that relies on the forest.
The correct answer is option (b) because clear-cutting is the method most likely to lead to a fragmented landscape with serious impacts on biodiversity.
Clear-cutting is a method of harvesting trees where all the trees in a specific area are cut down. This practice often results in large, open areas where the original forest once stood, leading to habitat loss and fragmentation.
In contrast, selective cutting (a) involves the removal of individual trees or specific types of trees, which typically has a less severe impact on the landscape and biodiversity compared to clear-cutting.
Shelter-wood cutting (c) is a method where trees are removed in a series of stages to create a new stand of trees, which can maintain some level of forest cover and structure.
Slash and burn clearing (d) is a traditional agricultural method that involves cutting and burning vegetation to create farmland, and it can lead to deforestation and biodiversity loss, but it is not typically used for timber harvesting. Gleaning (e) refers to the collection of leftover crops from farmers' fields after they have been commercially harvested and is not related to tree harvesting or forest management.
Earth's outer layer is composed of seven dominant plates. What is the name of this rigid outer layer?
A. mesosphere
B. hydrosphere
C. lithosphere
D .mantle
E. asthenospher
Answer:
Earth's lithosphere includes the crust and the uppermost mantle, which constitute the hard and rigid outer layer of the Earth.
34. When the top of a volcano collapses into the vent, a __________ is formed.
a. crater
b. neck
Answer:
A crater is the result of the collapse of the top of a volcano
Explanation:
When a volcano explodes, the igneus material is sent to the surface and it provokes the top of the volacano to collapse forming a crater.
How marine scientists investigate the ocean underlying geology, and organisms living in the water?
Answer:
sonar and GPSStudy of the ocean current, temperature, salinityStudy of the biologyearth studying satellitesExplanation:
The marine scientist makes use of the devices like the GPS and the sonar and they also study the movement of the oceanic current, including the study of the salinity conditions and temperature and the rise of the biodiversity of the species and also generated data from the earth marine satellites. These data are essential to help us to study the patterns of the marine geology and seafloor studies of the 0cean deeps.Oceanic crust spreads at ____1_______, creating new crust and slowly enlarging the ocean basin. _____2_______ are deep valleys at passive continental boundaries. They are likely eroded by ____3____, which occur when sediment-laden water rapidly moves down slope. Melt from the subducting plate rises to the surface, erupts through the crust on the overriding plate and forms _____4_______ on continents, or ____5________in the ocean.
Answer:
1. Mid-ocean ridges.2. Submarine canyons.3. Turbidity currents.4. Continental volcanic arcs.5. Volcanic island arcs.Explanation:
The new oceanic crusts are created in the mid-oceanic ridges and the oceanic submarine canyons are those that are enlarged by sedimentary basins and the occurrence of the turbidity of the current leads to the formations of sediment-laden water and that rapidly moves down the continental slopes and has vertical walls. The continental arcs form in the areas of the continental zones and here the continental crust gets subducted. And in a similar way, the volcanic islands arcs are formed in the oceans.A boxing tournament is scheduled to start at 8pm local time in Los Angeles (75 degreewest).At what time should fans in Nigeria (15 degree west ) switch on their television to watch the commencent of the match
Answer:
When standard time is being observed in Los Angeles, the boxing match held at 8 pm local time in Los Angeles it will be on at 5 am the following day in Nigeria.
Explanation:
The time difference between Nigeria and Los Angeles is 9 hours during standard time periods. Nigeria does not observe daylight savings time but Los Angeles and the state of California does, so between March 8th and November 1st, 2020 (the period for daylight savings time this year), the time difference will be 8 hours between Los Angeles and Nigeria. Therefore, during daylight savings time in Los Angeles, the match would be on at 4 am the next day in Nigeria and that is when those wanting to watch the match should turn their TVs on.
In contrast to a country with a primate city, a country whose cities follow the rank size rule is more likely to have-
a. wealth concentrated in urban areasb. fewer cultural centersc. more equality between urban and rural living standardsd. unequal living standards between larger and smaller citiese. a smaller overall population
Answer:
Option C: more equality between urban and rural living standards
Explanation:
In most countries with primate cities, there is a great imbalance in development. The biggest city may hold a great share of the country's entire population, about 35 - 45%.
On the contrary, countries who follow the rank-size rule, have more balanced cities, with great populations and levels of development. This increases the living standards in both rural and urban regions because people from rural areas don't need to go to one big city to get employment, opportunities, education, etc.