Carbon Cycle
Carbon is stored in plants as sugar. When leaves decay, they lose mass. Which explains what happens to the carbon in plants when they decay?
A. The carbon evaporates.
B. The carbon is destroyed as the leaves decompose.
C. The carbon is converted into nitrogen by bacteria in the soil.
D. The carbon is converted into carbon dioxide and released into the
atmosphere.
D. The carbon is converted into carbon dioxide and released into the atmosphere.
Which statement best describes how photosynthesis follows the law of conservation of energy?
A. Light energy from the Sun is converted into kinetic energy in plant cells.
B. Chemical energy from the Sun is converted into light energy in plant
cells.
C. Light energy from the Sun is converted into chemical energy in plant
cells.
D. Chemical energy from the Sun is converted into thermal energy in plant
cells.
C. Light energy from the Sun is converted into chemical energy in plant cells.
What is the formula for photosynthesis?
carbon dioxide + water + sun energy --> glucose + oxygen
There are two types of models:
- A three-dimensional model of the mitochondrion within a plant cell
- A diagram showing gas and nutrient exchange within the
mitochondrion
Which of the two models would best help show the process of Cellular Respiration?
A. The three-dimensional model because it can portray the complexity of the
mitochondrion.
B. The diagram because it shows the exchange of molecules that occur
during this process.
C. The diagram because it illustrates the relative size and shape of the gas
and nutrient molecules.
D. The three-dimensional model can be manipulated, showing function
B. The diagram because it shows the exchange of molecules that occur during this process.
What is the formula for Cellular respiration?
glucose + oxygen --> carbon dioxide + water + ATP
Which model demonstrates a correct pathway carbon takes in the carbon cycle?
A. soil → animals → plants → atmosphere
B. plants → soil → animals → atmosphere
C. atmosphere → plants → animals → soil
D. animals → plants → atmosphere → soil
C. atmosphere → plants → animals → soil
Which of the following statements is most accurate?
A. A finite (limited) amount of carbon exists on Earth, and it moves through living
and nonliving materials through the carbon cycle.
B. The amount of carbon on Earth cycles, gradually increasing as it moves
up the food chain, and decreasing until the next phase of the cycle.
C. Carbon flows through the food chain as animals eat it, then decomposes
and is permanently removed from the system when the food chain is
complete.
D. Carbon enters Earth's atmosphere when animals exhale, then moves into
space where its amount steadily increases, and finally moves back into
Earth's atmosphere to be used again.
A. A finite amount of carbon exists on Earth, and it moves through living and nonliving materials through the carbon cycle.
How would placing a plant in a dark room for 24 hours affect the rate of photosynthesis?
A. The rate of photosynthesis would increase and the plant would take in more water.
B. The rate of photosynthesis would decrease and the plant would produce more sugar.
C. The rate of photosynthesis would increase and the plant would produce more oxygen.
D. The rate of photosynthesis would decrease and the plant would take in
less carbon dioxide.
D. The rate of photosynthesis would decrease and the plant would take in less carbon dioxide.
Which statement best explains how herbivores contribute to the carbon cycle from the food they eat?
A. Herbivores use oxygen from the atmosphere to produce carbon dioxide
during photosynthesis.
B. Herbivores use carbon dioxide from the atmosphere to produce oxygen
during cellular respiration.
C. Herbivores eat plants, which produces carbon dioxide during
photosynthesis that is released into the atmosphere.
D. Herbivores eat plants, which produces carbon dioxide during cellular
respiration that is released into the atmosphere
D. Herbivores eat plants, which produces carbon dioxide during cellular respiration that is released into the atmosphere
Which statement about cellular respiration is true?
A. Oxygen is a waste product of cellular respiration in both plants and animals.
B. Oxygen is a waste product of cellular respiration in plants, but not in animals.
C. Carbon dioxide is a waste product of cellular respiration in both plants and animals.
D. Carbon dioxide is a waste product of cellular respiration in plants, but not in animals.
C. Carbon dioxide is a waste product of cellular respiration in both plants and animals.
Most of the carbon in rocks was stored there when Earth formed. The rest of Earth's carbon is stored in various reservoirs and exchanged in many ways. Which process does NOT contribute directly to the storage of carbon within sediment?
A. the deposition of organic carbon from decaying organisms
B. the deposition of dissolved carbon dioxide from the atmosphere
C. the formation of carbon dioxide through metabolism of carbohydrates
D. the formation of fossil fuels from terrestrial organisms under high heat
and pressure
C. the formation of carbon dioxide through metabolism of carbohydrates
Which statement best describes how photosynthesis follows the law of conservation of mass?
A. The volume of water used by this process is equal to the volume of
water released from plant leaves at night.
B. The cells in plants absorb the same amount of energy from the Sun that
humans need when burning sugars during digestion.
C. The number of oxygen atoms in the reactants used by this process
equals the total number of oxygen atoms in the products.
D. The amount of carbon dioxide gas absorbed by one plant is equal to the
amount of carbon dioxide gas exhaled from one human.
C. The number of oxygen atoms in the reactants used by this process equals the total number of oxygen atoms in the products.
A plant leaf is placed into a cup of water and is placed in by the window to receive light. Bubbles started to appear on plant leaf. Why did the bubbles appear?
A. Photosynthesis is occurring and bubbles of air are entering the water from
the area around the plan
B. Photosynthesis is occurring and bubbles of oxygen gas are being released
into the surrounding area.
C. Photosynthesis is occurring and bubbles of oxygen gas are being absorbed
into the plant leaf from the water.
D. Photosynthesis is occurring and bubbles of carbon dioxide gas are being
released by the leaf into the surrounding area.
B. Photosynthesis is occurring and bubbles of oxygen gas are being released into the surrounding area.
During exercise, the rate of cellular respiration increases. Why does increased cellular respiration cause people to breathe faster?
A. More water is lost from the body, and breathing hydrates the body.
B. More heat is generated by the body, and breathing cools the body quickly.
C. More nutrients are needed to produce more energy, and more oxygen must be
removed from the body.
D. More oxygen is needed to produce energy, and more carbon dioxide waste
must be removed from the body.
D. More oxygen is needed to produce energy, and more carbon dioxide waste must be removed from the body.
A scientist investigates the rate of cellular respiration when a person is
exercising vs at rest. How would the amount of gas released be
different in these two situations?
A. Less oxygen would be released when exercising than when at rest.
B. More oxygen would be released when exercising than when at rest.
C. Less carbon dioxide would be released when exercising than when at rest.
D. More carbon dioxide would be released when exercising than when at
rest.
D. More carbon dioxide would be released when exercising than when at rest.
A diagram showing the carbon cycle begins with CO2 from the atmosphere being taken in by a plant. An animal then consumes the CO2 in the plant, uses it as a source of energy, then exhales, returning the CO2 to the atmosphere. Which of the following statements needs to be corrected?
A. Animals do not release carbon dioxide; only plants do.
B. Animals do not use carbon dioxide as an energy source; they use sugars
or starches.
C. Plants do not transfer carbon to animals; animals absorb it directly from
the atmosphere.
D. Plants do not absorb carbon dioxide from the atmosphere; they only
absorb it from the ground.
B. Animals do not use carbon dioxide as an energy source; they use sugars or starches.
Which statement best describes how organisms demonstrate the transformation of energy?
A. Light energy from the Sun is converted into mechanical energy in a
rabbit, which is converted into thermal energy and dispersed into the
atmosphere.
B. Light energy from the Sun is converted into chemical energy in a
wildflower, which is converted into mechanical energy in a deer that eats
the wildflower.
C. Light energy from the Sun is converted into mechanical energy in a deer,
which produces waste that is absorbed by a wildflower to produce
chemical energy.
D. Light energy from the Sun is converted into chemical energy in a
mushroom, which is converted into thermal energy as the mushroom
breaks down dead matter.
B. Light energy from the Sun is converted into chemical energy in a wildflower, which is converted into mechanical energy in a deer that eats the wildflower.
Which of the following statements best describes the process of photosynthesis?
A. Carbon dioxide and water combine to form glucose and oxygen.
B. Carbon dioxide and glucose combine to produce energy and water.
C. Carbon dioxide, glucose, and water are released to produce energy.
D. Carbon dioxide and water are released when glucose and oxygen combine.
A. Carbon dioxide and water combine to form glucose and oxygen.
5 potted plants are in a straight line, with the first plant in front of a window and the last plant 10 meters away. Which gas will be released and what trend is most likely to happen?
A. Oxygen. The amount of gas released should be highest for the
plant in the middle and lowest for the plants at the ends.
B. Carbon dioxide. The amount of gas released should be highest
for the plant in the middle and lowest for the plants at the ends.
C. Oxygen. The amount of gas released should be highest for the
plant closest to the window and lowest for the plant farthest away from the
window.
D. Carbon dioxide. The amount of gas released should be highest
for the plant closest to the window and lowest for the plant farthest away from
the window.
C. Oxygen. The amount of gas released should be highest for the plant closest to the window and lowest for the plant farthest away from the window.
What are your cells doing during cellular respiration?
A. your cells convert kinetic energy into chemical energy.
B. your cells use oxygen to break down food molecules to release energy.
C. your cells absorb light energy through the chlorophyll in their chloroplasts.
D. your cells combine water and carbon dioxide to produce oxygen and
glucose.
B. your cells use oxygen to break down food molecules to release energy.
A toy car made out of plastic building blocks was broken apart so to build something different with the same blocks. Which stage of the carbon cycle is he best represented by breaking apart the blocks?
A. carbon atoms dissolving in the oceans
B. producers removing carbon from the atmosphere
C. organisms decay and carbon atoms return to the soil
D. consumers use carbon atoms to build body structures
C. organisms decay and carbon atoms return to the soil
CO2 + water + energy → glucose + oxygen
Which statement about this process is true and supported by the equation?
A. The process follows only the law of conservation of mass and not the law
of conservation of energy because the number of atoms stays the same,
but energy is used up.
B. The process follows only the law of conservation of energy and not the
law of conservation of mass because energy is the same in the products,
but the number of atoms increases.
C. The process does not follow either the law of conservation of mass or the
law of conservation of energy because the number of atoms increases and
the amount of energy is reduced.
D. The process follows both the laws of conservation of mass and of energy
because the number of atoms stays the same, and the energy is used to
make the products, is stored in the products, and is converted to heat.
D. The process follows both the laws of conservation of mass and of energy because the number of atoms stays the same, and the energy is used to make the products, is stored in the products, and is converted to heat.
A student studies photosynthesis and cellular respiration in plants. Which of the following reactions would produce 12 grams (g) of glucose and oxygen?
A. when a total of 12g of carbon dioxide and water react in photosynthesis
B. when a total of 24g of carbon dioxide and water react in photosynthesis
C. when a total of 12g of carbon dioxide and water react in cellular respiration
D. when a total of 24g of carbon dioxide and water react in cellular
respiration
A. when a total of 12g of carbon dioxide and water react in photosynthesis
After food is consumed, chemical nutrients are absorbed into the blood then travel to the mitochondria of our cells. Which reaction must occur next for the cell to carry on other activities?
A. Glucose and water combine to produce high-energy molecules.
B. Glucose and oxygen combine to produce high-energy molecules.
C. Oxygen, light, and glucose combine to produce high-energy molecules.
D. Oxygen, carbon dioxide, and glucose combine to produce high-energy
molecules.
B. Glucose and oxygen combine to produce high-energy molecules.