Student A's example of testing plant growth in different types of soils is a scientific experiment, as it involves a controlled manipulation of variables with a control group. An experiment is a systematic procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact.
An example of a scientific experiment is provided by Student A: Testing plant growth in different types of soils. This is an experiment because it involves manipulating one variable (the type of soil) and observing the effect on a dependent variable (the growth of the plants). It also requires an experimental group and a control group, where the control group will use the same type of soil that the plants normally grow in, without any changes, to compare against the experimental groups with different soils. Student B's example of comparing the water level in a lake during different times of the year is more of an observational study since it doesn't involve a control group or the manipulation of variables.
An experiment is a type of scientific investigation carried out under controlled conditions, often in a laboratory or with controlled variables in a field setting. To experiment, scientists follow the scientific method, which includes formulating a hypothesis, designing a study with independent and dependent variables along with control groups, and analyzing the data to confirm or refute the hypothesis.
In the case of bacterial growth on gels, the independent variable is the type of gel used (A or B), while the dependent variable is the growth of bacteria measured after 24 hours. For an experiment to be valid, it's necessary to control the environmental conditions and other factors that could affect the dependent variable, such as temperature or light conditions in the case of plant growth.
How does deforestation increase the amount of CO2 in the atmosphere? Explain.
Answer:
Getting rid of trees means they can't photosynthesis
Explanation:
Photosynthesis is the process that all plants and trees do, they take in the CO2 that we breathe out and they turn it into oxygen for us to breathe in. If deforestation (getting rid of many trees) happens, it means they can't photosynthesis meaning CO2 stays in the air!
Hope this helps!
Answer:
Deforestation by fire is the worst polluter as not only does the fuel burning increase carbon dioxide in the air as it releases during the burn but the trees that have perished can no longer absorb carbon dioxide from the atmosphere to produce oxygen.
Explanation:
As mass increases, what is the effect on the star’s temperature?
Answer: As the mass of star increases, the temperature and luminosity also increases.
Explanation:
This can be described in what happens in main sequence star( example, the Sun), which is powered by fusion of hydrogen into helium in its core. Main sequence star exhibit a common characteristic which is hydrostatic equilibrium. This means,the inward force of gravity, which tends to compress the star, is balanced by the outward force due to the pressure. Thus when an extra mass such as hydrogen is added to its core, there will be increase in mass which leads to a higher compression. This in turn will lead to central density and temperature. As the temperature increases, fusion of gases occurs faster resulting to a much higher luminosity. I hope this helps, thanks.
which kingdom is completely off unicellular organisms that are prokaryotic
Thats a kingdom of Archaea
The kingdom made up of unicellular prokaryotic organisms falls under two domains: Bacteria and Archaea. These organisms were the first cells to evolve on Earth, and can survive in a wide range of environments.
Explanation:The kingdom that is entirely made up of unicellular organisms that are prokaryotic falls under two domains: Bacteria and Archaea. These domains consist of unicellular organisms that lack a nucleus and other membrane-bound organelles. The prokaryotes, under both these domains, were the first cells to evolve on Earth, approximately 3.5 to 4.5 millions of years ago. They exemplify significant diversity in form and function, covering a wide range of environments from extreme conditions to moderate ones like the human digestive system.
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When are lung transplants performed?
In most cases, a lung transplant is done only after all other treatments for lung failure are unsuccessful. Lung transplants may be recommended for people under age 65 who have severe lung diseases
Answer:
In this question I will explain when to do a lung transplant.
Explanation:
Lung transplants are usually performed when the lungs are damaged or unhealthy, this can make it difficult for the body to get the oxygen it needs to survive. Lung damage can be treated with medications or with special breathing devices. but when these measures no longer work, the transplant must be performed.
Carbon cycles through the biosphere in all of the following processes EXCEPT
A. Photosynthesis
B. Transpiration
C. Burning of fossil fuels
D. Decomposition of plants
Answer: burning of fossil fuels.
Explanation:
Which of the following activities are performed by computer programmers? Choose all that apply.
Answer:
Four Activities in a Computer -
· Input: Capturing and gathering data.
· Processing: Converting or changing the data into useful
outputs.
· Storage: Maintaining data within the system on a
temporary or permanent basis.
Output: Produces the results of the process in a matter
that is perceptible to human senses or used as input for another system.
Explanation:
where are the choices
Answer:D,E,F
Explanation:i got it right
How might the human body be compared to a car bicycle? Need help like now!
Answer:
Like the human body, the bicycle relys on other things to keep moving. For example, in order for the bicycle to keep moving, the rider needs to have legs and be able to push the pedals foreward. In order to breath, the body needs to have lungs and those lungs depend on the heart to pump blood throughout the body. The lungs rely on the heart and your brething relys on your lungs. Hope this helped, brainliest always appreciated.
Explanation:
Plants are called 1 ) _________ because they make their own food source. Many people believe they are “feeding” a plant when they put it in soil, water it, or place it outside in the Sun, but none of these things are considered food. Rather, plants use those as ingredients to form sugar. This process is called 2 ) __________ and is performed by all plants, algae, and even some microorganisms. To perform photosynthesis, plants need three things: 3 ) ________________, water, and sunlight.
Fill in the blanks
Answer:
Explanation:
1) Autotrophs
2) Photosynthesis
3) Chlorophyll
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Kayla is learning about ecology and made a study chart. Which headings best complete the chart? X: Abiotic Y: Biotic X: Biotic Y: Abiotic X: Niche Y: Habitat X: Habitat
Kayla is learning about ecology and made a study chart.
Which headings best complete the chart?
X: Abiotic
Y: Biotic
X: Biotic
Y: Abiotic
X: Niche
Y: Habitat
X: Habitat
Answer:
The answer is C X: Niche Y: Habitat
P.S: Can you mark brainliest
Answer:c X:Niche
Y: habitat
Explanation:
Diffusion occurs due to particles
Question 4
Cyanobacteria are photoautotrophs because they require ________
in order to do photosynthesis.
A. inorganic chemicals
B. sunlight
C. oxygen
D. glucose
I’m really confused. If you know this, could you please explain it to me? Thank you
Answer:
B: sunlight
Explanation:
Photoautotrophs need sunlight to make their own food, to do photosynthesis
the prefix photo means light meaning it needs sunlight to make it's own food.
Which is statement describes diagram above
The correct answer is B. DNA transcription is producing messenger RNA.
The diagram given in the question shows the process of DNA transcription, which is the process of copying DNA into messenger RNA (mRNA).
Here's a breakdown of the diagram:
The double helix on the left represents the DNA molecule.
The enzyme RNA polymerase attaches to the DNA at a specific starting point called the promoter.
RNA polymerase unwinds the DNA helix and separates the two strands.
Using the DNA template, RNA polymerase builds a complementary mRNA molecule.
The mRNA molecule detaches from the DNA and moves away.
The DNA helix rewinds itself.
The diagram is showing the process of DNA transcription, which is how DNA is copied into mRNA.
Complete Question:
The statement that describes the diagram above is that the DNA transcription is producing messenger RNA. That is option B.
How does the diagram show DNA transcription into RNA?
The double helix on the left represents the DNA molecule.
The enzyme RNA polymerase attaches to the DNA at a specific starting point called the promoter.
RNA polymerase unwinds the DNA helix and separates the two strands.
Using the DNA template, RNA polymerase builds a complementary mRNA molecule.
The mRNA molecule detaches from the DNA and moves away.
The DNA helix rewinds itself.
The diagram is showing the process of DNA transcription, which is how DNA is copied into mRNA
A patient arrives at the hospital with severe pain from kidney stones. After testing, his urine is found to have a pH of 9.
What is true about the patient's urine sample?
Answer:
Basic
Explanation:
In the pH scale, the pH after 7 to 14 is said to be basic this proves that the patient's urine is basic with pH 9.
Answer:
It is basic.
Explanation:
Based on the pH scale, a pH of 9 is considered to be basic.
List the three major classes of mollusks.
Answer:
gastropods, bivalves, and cephalopods
They are the three main types of mollusks.
Final answer:
The three major classes of mollusks are Bivalvia, Gastropoda, and Cephalopoda. Bivalvia includes mollusks with two shells, Gastropoda comprises snails and slugs with shells or none, and Cephalopoda includes marine organisms like squids and octopuses. Mollusks have a basic body plan with a foot, viscera, and mantle, which can produce shells, and many have a radula for feeding.
Explanation:
List the Three Major Classes of Mollusks
The three major classes of mollusks are Bivalvia, Gastropoda, and Cephalopoda.
Bivalvia: This class includes mollusks with two shells, such as oysters, clams, and mussels.
Gastropoda: Members of this class, such as snails and slugs, often have a shell which can be planospiral or conispiral and an asymmetrical body plan.
Cephalopoda: This marine group, which includes octopus, squid, and the chambered nautilus, contains some of the largest invertebrates.
Basic Body Plan of a Mollusk
The basic body plan of a mollusk includes a foot for movement, viscera, and a mantle that may secrete a shell.
The Mantle and Radula
The mantle is a significant part of the mollusk's anatomy, usually forming a cavity for breathing and excretion, and it can produce the mollusk's shell. The radula is a unique, tongue-like organ that most mollusks use to feed by scraping or cutting food before ingestion.
Which best describes the difference between physical and chemical changes? *
(1 Point)
A. Physical changes only change the size or shape, but chemical changes change the molecular structure and
create a new substance
B. Physical are always visible changes and chemical changes are never visible.
C. Chemical changes only change the size or shape, but physical changes change the molecular structure and
create a new substance
D. Chemical are always visible changes and Physical changes are never visible
Answer:
A. Physical changes only change the size or shape, but chemical changes change the molecular structure and create a new substance.
A Type I significance error occurs when a researcher claims that there is __________. A. enough statistical support for the research hypothesis when there is not B. not enough statistical support for the research hypothesis when there is C. enough statistical support for the research hypothesis when there is D. not enough statistical support for the research hypothesis when there is not Please select the best answer from the choices provided A B C D
A Type I significance error occurs when a researcher claims that there is sufficient statistical support for a research hypothesis, while there is not. So, the correct option is A.
What is Hypothesis?A hypothesis is defined as a proposed explanation for a phenomenon that must be a scientific hypothesis where the scientific method requires that one be able to test it. Scientists usually base scientific hypotheses on past observations that cannot be satisfactorily explained with available scientific theories.
A hypothesis is also said to be an assumption which is an idea proposed for reasoning in order to test it to see whether it can be true or not. In the scientific method, hypotheses are formulated prior to any applied research, in addition to a basic background review.
Therefore, the correct option is A.
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Complete the table--called a character matrix-below. Place a check (V) if 7 points
the species has the trait and leave it blank if it does not
compound
cones
cone
scales
without
wings
large
bladelike
wings
pollen
without air
sacs
smaller
scaly
leaves
small
fleshy
cones
A. fibrosa
Bois
bouchon
Coral reef
pine
Monkey
puzzle tree
Norfolk
Island pine
d
ENG
The question is asking to fill in a character matrix for several species based on a list of given traits. You would need a solid knowledge about these species to accurately complete this task.
Explanation:To complete the
character matrix
, you need knowledge about the characteristics of the mentioned species: A. fibrosa, Bois bouchon, Coral Reef Pine, Monkey puzzle tree, and Norfolk Island pine. The information on traits - compound cones, cone scales without wings, large bladelike wings, pollen without air sacs, smaller scaly leaves, and small fleshy cones should be carefully evaluated against each species. With a check (V) marking a species possessing a certain trait, and a blank symbolizing its absence, the filled table visually represents the relation between each plant's specific traits. For example, if A. fibrosa has large bladelike wings, place a check (V) in the corresponding box.
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Which situation may cause delayed rigor mortis?
O A.
The victim was found in the summer during a heat wave.
B.
The victim died a violent death.
C. The victim was sleeping at the time of death.
OD. The victim died of cancer.
Answer:
C.
Explanation:
A body at rest may experience a delayed onset of rigor mortis and it may last longer.
if the haploid number in a cell were 30 what would the diploid number be ?
Answer:
60
Hope this helps:)
Which event describes how water cycles through living things?
A. Runoff eventually spills into the ocean.
B. Rocks break off the side of a cliff.
O C. Waves crash down on a beach.
D. Humans sweat in a tropical heat.
The event that describes how water cycles through living things is: "D. Humans sweat in a tropical heat."
What event Describes the Water Cycle?Humans sweat in a tropical heat is an event that describes how water cycles through living things because when humans sweat, water is released from their bodies through the skin.
This water evaporates into the atmosphere, forms clouds, and eventually falls back to Earth as precipitation. Through this process, water is continuously cycled between living organisms and the environment, ensuring its availability for various biological functions.
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Hookworms live inside the intestines of dogs. As the dog eats, the hookworms consume partially digested food. As a result of this nutrient diversion, the dog can become malnourished and weakened. Which BEST describes the relationship between the hookworms and the dog?
a.) a predator-prey relationship
b.) a mutualistic relationship
c.) a producer-consumer relationship
d.) a parasitic relationship
Answer:
a
Explanation:
this is because it is sharing in the food that is meant for the organism
Answer:
the correct answer is D
a parasitic relationship
6. The height of tides changes throughout the day mainly because
a. the Earth rotates on its axis, changing the side of Earth that faces the moon.
b. the Earth rotates on its axis, changing the side of Earth that faces the sun.
c. the moon revolves around Earth throughout the day.
d. the Earth rotates on its axis and the spin causes water to be "left behind".
Answer:
THE MOON
Explanation:
TYE MOON PULLS ON EARTH WJGH GRAVITY
Final answer:
The height of tides changes mainly due to the rotation of the Earth on its axis, which changes the side facing the moon, leading to the formation of tidal bulges and resulting in two tides per day. The correct answer is: a. the Earth rotates on its axis, changing the side of Earth that faces the moon.
Explanation:
The height of tides changes throughout the day mainly because the Earth rotates on its axis, changing the side of Earth that faces the moon. Ocean tides are a very observable result of the Moon's gravity acting on Earth, creating a high tide on the side of Earth nearest to the Moon, where the Moon's gravitational pull is strongest. Additionally, high tide also occurs on the opposite side of Earth because Earth is pulled toward the Moon more than the water on the far side. As Earth rotates, the tidal bulge keeps its orientation with the Moon, and thus there are two tides per day because the Moon moves in its orbit each day as well.
2. Explain how batural selection might have produced the modern giraffe from short-necked ancestors.
Answer:
Natural selection means survival of the fittest, or the most fit animals for an environment. The most fit animals tend to thrive in their environment better than less fit animals. In this case, a short-neck Giraffe will not be able to reach leaves {its source of food}, causing it to be hungry and unable to eat. Over time, Giraffe's formed longer necks to be able to read tree leaves, making them more fit to survive.
If this is confusing, I can do my best to explain further! :D
Identify the plant organs seen in the drawing. A Leaf B Bark C Route The parts of a tree are labeled. The green top part is labeled A. The brown part above ground is labeled B. The part underground is labeled C.
Answer:
A. Leaves
B. Stem
C. Roots
Answer:
A. Leaves
B. Stem
C. Roots
Explanation:
Why is competition for biotic resources a key factor in the success of an organisms or a population in an ecosystem
Competition for biotic resources is a key factor in the success of an organism or a population in an ecosystem because it stops the process of overpopulation and allows the organisms to survive the strongest.
What is an Ecosystem?An ecosystem may be defined as a place or area where members of different species live together and interact with one another for the purpose of food, space, and mating partner.
Competition is a type of negative, negative interaction where both species are harmed. In this type of interaction, both species compete over food, space, and other resources. Competition prevents the population of species not to increase rapidly due to various effects.
As a result of this, the size of the population does not alter much with respect to time. But if there is no competition, the size of the species easily attains the carrying capacity.
Therefore, competition significantly stops the process of overpopulation and allows the organisms to survive the strongest.
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What are you doing when you're making sound?
Question 1 options:
Causing air pressure to drop.
Causing photons to travel.
Causing electromagnetic waves to radiate.
Causing air molecules to vibrate.
Question 2 (1 point)
What is the medium of sound?
Question 2 options:
water
solids
gases
air, liquids, or solids
Question 3 (1 point)
Where would sound travel the slowest?
Question 3 options:
At the equator
In New York City
In the pine forests of Georgia
At the North Pole
Question 4 (1 point)
What is another name for thermal energy?
Question 4 options:
electromagnetic energy
heat
temperature
electricity
Question 5 (1 point)
Which of the types of heat transfer involve direct contact between two objects?
Question 5 options:
Rarefraction
Convection
Conduction
Radiation
Question 6 (1 point)
Sunbathers warming up in the bright sun is what type of thermal energy transfer?
Question 6 options:
radiation
convection
rarefraction
conduction
Question 7 (1 point)
_______________________ is released when bonds form in a chemical reaction.
Question 7 options:
potential chemical energy
kinetic chemical energy
elastic energy
hydrothermal energy
Question 8 (1 point)
Where is potential chemical energy stored?
Question 8 options:
Between the protons of an atom
In a closet
Between different molecules
In the bonds between atoms
Question 9 (1 point)
When chemical energy is released, what is formed?
Question 9 options:
a nuclear reaction
An explosion
Lightning
A new substance
Question 10 (1 point)
Kinetic electrical energy is caused by the flow of
Question 10 options:
neutrons
atoms
electrons
protons
Question 11 (1 point)
Materials that cannot carry electric energy are called
Question 11 options:
boring
insulators
electricity blockers
conductors
Question 12 (1 point)
Materials that can carry electric energy are called
Question 12 options:
exciting
insulators
conductors
carrying devices
Answer:
causing air molecules to vibrate air,liquids or solidsAt the north poleHeat energyconductionradiationKinetic chemical energyin the bonds between atomsA nuclear reactionElectronsinsulatorsconductorsExplanation:
when making sounds air molecules vibrates and these air molecules bump into one another causing sound to be produced.
The medium by which sound can be generated and transferred are air, liquids or solids
The sound would travel slowest at the north pole because the density of the areas
Another name for thermal energy is heat energy
The type of heat transfer that involve direct contact between two objects is conduction because it involves the transfer of heat between atoms which can be achieved by direct contact between elements containing the atoms
sunbathers warming up in the bright sun gets heat energy via Radiation from the sun
Kinetic chemical energy is released when bonds form in a chemical reaction because potential chemical energy exists between bonds of atoms
potential chemical energy is stored in the bonds between atoms
when chemical energy is released a nuclear reaction is formed
kinetic electrical energy is caused by the flow of electrons
materials that cannot carry electric energy are called insulators and they also inhibit the flow of electrical energy in them
Materials that can carry electric energy are called conductors
Multiple choices are 1. causing air molecules to vibrate; 2. air, liquids, or solids; 3. At the north pole; 4. Heat energy; 5.conduction; 6.radiation etc.
What are Electromagnetic waves?
When creating sounds air molecules vibrate and these air molecules bump into one another inducing sound to be produced. When The medium by which sound can be generated and also transferred are air, liquids, or solids Then, The sound would travel slowest at the north pole because of the density of the areas Now, Another name for thermal energy is heat energy.
When The kind of heat transfer that involves immediate contact between two things is conduction because it involves the transfer of heat between atoms which can be achieved by a direct connection between elements retaining the atoms. The sunbathers heating up in the bright sun get heat energy via Radiation from the sun.
When the Kinetic chemical energy is discharged when bonds form in a chemical reaction because potential chemical energy exists between bonds of atoms. When the potential chemical energy is stored in the bonds between atoms. when the chemical energy is released under a nuclear reaction is formed.
When the kinetic electrical energy is caused by the flow of electrons. When materials that cannot carry electric energy are called insulators and they also inhibit the flow of electrical energy in them. Also, The Materials that can carry electric energy are called conductors.
Multiple choice questions are:
Causing air molecules to vibrateAir, liquids, or solidsAt the north poleHeat energyConductionRadiationKinetic chemical energyIn the bonds between atomsA nuclear reactionElectronsInsulatorsConductorsFind more information about Electromagnetic waves here:
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What are the reactants of photosynthesis and where do they come from?
Answer:
whenever plants photosynthesize they use the sun to male sugar for themselves. they take is carbon dioxide and sunlight and give out oxygen
Have you ever heard of a person being in a dangerous situation and demonstrating superhuman strength? What do you think is happening in your body?
please answer quickly
Explanation:
When one's life is in danger, it causes them to do things they wouldn't normally be able to do.
This stimulates the, "fight-flight-or-freeze" response. Three hormones are released into the bloodstream, adrenaline, cortisol, and norepinephrine.
It is what gives you adrenaline rushes on life threatening situations, or even just scary situations. When someone is scared and their teeth chatter, it is because of these three hormones being released.
Tina and Jill have two balls, ball A and ball B. Ball A is twice as heavy as ball B. Tina and Jill push the balls with the same strength
across the same flat surface.
What will happen to the balls?
A.
Neither ball will roll at all
B.
Ball A will roll faster.
C.
Ball B will roll faster.
D. Ball A and ball B will roll at the same speed.
Answer:
c
Explanation:
it is lighter and force aginst it is not at great as ball A
if a somatic cell in a butterfly contains 24 chromosomes, how many would a butterfly egg contain
Answer: 12 chromosomes :)
Final answer:
A butterfly egg would contain 12 chromosomes, which is half the number of chromosomes found in a somatic cell of a butterfly, as gametes are haploid.
Explanation:
If a somatic cell in a butterfly contains 24 chromosomes, a butterfly egg, which is a type of gamete, will contain half the number of chromosomes. This is because somatic cells are diploid cells (designated as 2n), meaning they contain two sets of chromosomes, one set from each parent. However, gametes are haploid cells (designated as 1n), having only one set of chromosomes. When somatic cells undergo meiosis to form gametes, the chromosome number is halved. Therefore, a butterfly egg will contain 12 chromosomes.