cle 185412 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which increases the amount of carbon dioxide in the atmosphere, acting as a carbon source? Choice Feedback *A. Respiration That's correct! B. Photosynthesis That's not it. Photosynthesis takes in carbon dioxide. C. Formation of carbonates in the ocean That's not it. Carbonates in the ocean store carbon. D. Carbon uptake in the ocean That's not it. Carbon uptake is the process of the ocean absorbing carbon from the atmosphere. Global Incorrect Feedback The correct answer is: Respiration. -------------------------------------------------------------------------------- Question 1b of 10 ( 2 Carbon Cycle 250176 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which increases the amount of carbon dioxide in the atmosphere, acting as a carbon source? Choice Feedback *A. Respiration That's correct! B. Photosynthesis That's not it. Photosynthesis takes in carbon dioxide. C. Formation of carbonates in the ocean That's not it. Carbonates in the ocean store carbon. D. Carbon uptake in the ocean That's not it. Carbon uptake is the process of the ocean absorbing carbon from the atmosphere. Global Incorrect Feedback The correct answer is: Respiration. -------------------------------------------------------------------------------- Question 1c of 10 ( 2 Carbon Cycle 250184 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which removes carbon dioxide from the atmosphere, acting as a carbon sink? Choice Feedback *A. Formation of carbonates in the ocean That's correct! B. Plant respiration That's not it. This releases carbon dioxide into the atmosphere. C. Burning fossil fuels That's not it. This releases carbon dioxide. D. Burning plants That's not it. This releases carbon dioxide. Global Incorrect Feedback The correct answer is: Formation of carbonates in the ocean. -------------------------------------------------------------------------------- Question 2a of 10 ( 2 Carbon Cycle 185413 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which molecule is used up in photosynthesis? Choice Feedback A. Oxygen That's not it. Oxygen is a product of photosynthesis. B. Sugar That's not it. Sugar is a product of photosynthesis. C. Nitrogen That's not it. Nitrogen is not involved in photosynthesis. *D. Carbon dioxide That's correct! Global Incorrect Feedback The correct answer is: Carbon dioxide. -------------------------------------------------------------------------------- Question 2b of 10 ( 2 Carbon Cycle 250177 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which molecule is used up in photosynthesis? Choice Feedback A. Oxygen That's not it. Oxygen is a product of photosynthesis. B. Sugar That's not it. Sugar is a product of photosynthesis. C. Nitrogen That's not it. Nitrogen is not involved in photosynthesis. *D. Water That's correct! Global Incorrect Feedback The correct answer is: Water. -------------------------------------------------------------------------------- Question 2c of 10 ( 2 Carbon Cycle 250185 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which molecule is a product of photosynthesis? Choice Feedback A. Water That's not it. Water is used up in photosynthesis. B. Carbon dioxide That's not it. Carbon dioxide is used up in photosynthesis. C. Nitrogen That's not it. Nitrogen is not involved in photosynthesis. *D. Sugar That's correct! Global Incorrect Feedback The correct answer is: Sugar. -------------------------------------------------------------------------------- Question 3a of 10 ( 2 Carbon Cycle 185414 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which is a leading theory for the formation of fossil fuels? Choice Feedback *A. Organic matter was compressed and heated. That's correct! B. Nitrogen decayed, forming hydrocarbons. That's not it. Nitrogen does not form hydrocarbons. C. Radioactivity from Earth's early development formed hydrocarbons. That's not it. Radioactivity did not cause the formation of fossil fuels. D. Carbon accumulated due to excess nitrogen levels. That's not it. Carbon did not accumulate due to the presence of excess nitrogen. Global Incorrect Feedback The correct answer is: Organic matter was compressed and heated. -------------------------------------------------------------------------------- Question 3b of 10 ( 2 Carbon Cycle 250178 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which is a leading theory for the formation of fossil fuels? Choice Feedback *A. Fossil fuels were formed when Earth formed. That's correct! B. Carbon dioxide levels decreased, resulting in nitrogen fixation. That's not it. Nitrogen and carbon don't interact in this way. C. Earth cooled, changing oxygen into carbon. That's not it. This cannot happen. D. Fossil fuels arrived on Earth from comets and asteroids. That's not it. This is not a leading theory. Global Incorrect Feedback The correct answer is: Fossil fuels were formed when Earth formed. -------------------------------------------------------------------------------- Question 3c of 10 ( 2 Carbon Cycle 250186 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which is a leading theory for the formation of fossil fuels? Choice Feedback *A. Dead animals and plants were compressed for many years. That's correct! B. Nitrogen fixated, forming hydrocarbons. That's not it. Nitrogen does not form hydrocarbons. C. Earth's magnetic field shifted, resulting in hydrocarbons. That's not it. Magnetic fields did not cause the formation of fossil fuels. D. Carbon accumulated due to excess nitrogen levels. That's not it. Carbon did not accumulate due to the presence of excess nitrogen. Global Incorrect Feedback The correct answer is: Dead animals and plants were compressed for many years. -------------------------------------------------------------------------------- Question 4a of 10 ( 1 Nitrogen Cycle 185415 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: What is the process of pulling apart an N2 molecule? Choice Feedback A. Denitrification That's not it. Denitrification is the process of returning gaseous nitrogen back into the atmosphere. *B. Nitrogen fixation That's correct! C. Photosynthesis That's not it. Photosynthesis is when plants convert light and carbon dioxide into sugar and oxygen. D. Respiration That's not it. Respiration is breathing. Global Incorrect Feedback The correct answer is: Nitrogen fixation. -------------------------------------------------------------------------------- Question 4b of 10 ( 1 Nitrogen Cycle 250179 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: What does nitrogen fixation accomplish? Choice Feedback A. It allows industry to mass-produce nitrogen. That's not it. This is the process of splitting apart nitrogen molecules. *B. It allows plants to use nitrogen to grow. That's correct! C. It allows bacteria to use nitrogen to grow. That's not it. Bacteria perform nitrogen fixation. D. It allows respiration to occur. That's not it. Respiration is breathing, and does not require nitrogen. Global Incorrect Feedback The correct answer is: It allows plants to use nitrogen to grow. -------------------------------------------------------------------------------- Question 4c of 10 ( 1 Nitrogen Cycle 250187 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Why is nitrogen fixation necessary? Choice Feedback A. Plant life cannot use nitrogen atoms unless they are fixed into pairs. That's not it. This is not true. *B. Most plants use single nitrogen atoms, not N2 molecules. That's correct! C. Photosynthesis requires excess nitrogen. That's not it. Photosynthesis is when plants convert light and carbon dioxide into sugar and oxygen. D. Respiration uses nitrogen that is attached to oxygen. That's not it. Respiration is breathing, and does not require nitrogen. Global Incorrect Feedback The correct answer is: Most plants use single nitrogen atoms, not N2 molecules. -------------------------------------------------------------------------------- Question 5a of 10 ( 2 Nitrogen Cycle 185416 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: What is the name for runaway plant growth because of excess nitrogen? Choice Feedback *A. Eutrophication That's correct! B. Nitrogen fixation That's not it. This is the process of splitting apart a nitrogen molecule. C. Denitrification That's not it. This is the process of returning nitrogen to the atmosphere. D. Respiration That's not it. Respiration is breathing. Global Incorrect Feedback The correct answer is: Eutrophication. -------------------------------------------------------------------------------- Question 5b of 10 ( 2 Nitrogen Cycle 250180 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: When excess fertilizer drains into a lake, _____ may occur, harming fish populations. Choice Feedback *A. eutrophication That's correct! B. nitrogen fixation That's not it. This is the process of splitting apart a nitrogen molecule. C. denitrification That's not it. This is the process of returning nitrogen to the atmosphere. D. respiration That's not it. Respiration is breathing. Global Incorrect Feedback The correct answer is: eutrophication. -------------------------------------------------------------------------------- Question 5c of 10 ( 2 Nitrogen Cycle 250188 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which is a problem related to runoff of fertilizer? Choice Feedback *A. Eutrophication That's correct! B. Greenhouse effect That's not it. This is related to increasing carbon dioxide levels. C. Denitrification That's not it. This is not a problem. It is the process of returning nitrogen to the atmosphere. D. Acid rain That's not it. This is not caused by fertilizer runoff. Global Incorrect Feedback The correct answer is: Eutrophication. -------------------------------------------------------------------------------- Question 6a of 10 ( 1 Heat Transfer 185417 ) Maximum Attempts: 1 Question Type: Text Fill In Blank Maximum Score: 5 Is Case Sensitive: false Correct Answer: convection Question: What is the term for heat transfer because of the movement of a gas? Attempt Incorrect Feedback 1st That's not it. Don't confuse the three types of heat transfer. Correct Feedback That's correct! Global Incorrect Feedback The correct answer is: convection. -------------------------------------------------------------------------------- Question 6b of 10 ( 1 Heat Transfer 250192 ) Maximum Attempts: 1 Question Type: Text Fill In Blank Maximum Score: 5 Is Case Sensitive: false Correct Answer: conduction Question: What is the term for heat transfer because of direct contact? Attempt Incorrect Feedback 1st Correct Feedback That's correct! Global Incorrect Feedback The correct answer is: conduction. -------------------------------------------------------------------------------- Question 6c of 10 ( 1 Heat Transfer 250193 ) Maximum Attempts: 1 Question Type: Text Fill In Blank Maximum Score: 5 Is Case Sensitive: false Correct Answer: radiation Question: What is the term for heat transfer because of the movement of electromagnetic waves? Attempt Incorrect Feedback 1st Correct Feedback That's correct! Global Incorrect Feedback The correct answer is: radiation. -------------------------------------------------------------------------------- Question 7a of 10 ( 3 Heat Transfer 185418 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Why does the ocean heat and cool more slowly than the atmosphere? Choice Feedback A. The atmosphere receives more of the sun's energy. That's not it. This is not the cause. B. The atmosphere has a higher heat capacity. That's not it. A high heat capacity means something heat and cools easily. C. The ocean has a lower density. That's not it. The ocean has a higher density, but this is irrelevant. *D. The ocean has a higher heat capacity. That's correct! Global Incorrect Feedback The correct answer is: The ocean has a higher heat capacity. -------------------------------------------------------------------------------- Question 7b of 10 ( 3 Heat Transfer 250181 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which liquid would be the most difficult to raise or lower the temperature of? Choice Feedback A. One with a high density That's not it. Density is not the relevant factor. B. One with a low heat capacity That's not it. This would be easy to raise or lower the temperature of. C. One with a low density That's not it. Density is not the relevant factor. *D. One with a high heat capacity That's correct! Global Incorrect Feedback The correct answer is: One with a high heat capacity. -------------------------------------------------------------------------------- Question 7c of 10 ( 3 Heat Transfer 250189 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Why does Earth's air temperature vary greatly during the day, while its ocean temperature varies only slightly? Choice Feedback A. The ocean receives more of the sun's energy. That's not it. This is not the cause. B. The ocean has a lower heat capacity. That's not it. A low heat capacity means something heat and cools easily. C. The atmosphere has a lower density. That's not it. This is true, but this is irrelevant. *D. The atmosphere has a lower heat capacity. That's correct! Global Incorrect Feedback The correct answer is: The ocean has a higher heat capacity. -------------------------------------------------------------------------------- Question 8a of 10 ( 3 Heat Transfer 185419 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Why do dark-colored shirts get hotter in the sun than light-colored shirts? Choice Feedback A. Dark-colored shirts absorb more convection. That's not it. The cause is radiation, not convection. *B. Dark-colored shirts reflect less radiation. That's correct! C. Light-colored shirts conduct heat better. That's not it. The cause is radiation, not conduction. D. Light-colored shirts absorb more radiation. That's not it. Light-colored shirts absorb less radiation. Global Incorrect Feedback The correct answer is: Dark-colored shirts reflect less radiation. -------------------------------------------------------------------------------- Question 8b of 10 ( 3 Heat Transfer 250182 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which is true about light and heat? Choice Feedback A. Dark colors absorb more radiation, making them cooler. That's not it. Dark colors are warmer. *B. Dark colors reflect less radiation, making them warmer. That's correct! C. Light colors conduct heat better, releasing more radiation. That's not it. The conduction does not affect the radiation. D. Light colors absorb more radiation, making them warmer. That's not it. Light-colored shirts absorb less radiation. Global Incorrect Feedback The correct answer is: Dark colors reflect less radiation, making them warmer. -------------------------------------------------------------------------------- Question 8c of 10 ( 3 Heat Transfer 250190 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: What is true about black and white shirts in the summer? Choice Feedback A. Black shirts absorb and reflect more radiation. feedback textThat's not it. They cannot reflect and absorb more. *B. Black shirts absorb more and reflect less radiation. That's correct! C. White shirts absorb more and reflect less radiation. That's not it. White shirts are less warm. D. White shirts absorb and reflect more radiation. That's not it. They cannot reflect and absorb more. Global Incorrect Feedback The correct answer is: Black shirts absorb more and reflect less radiation. -------------------------------------------------------------------------------- Question 9a of 10 ( 2 Heat Transfer 185421 ) Maximum Attempts: 1 Question Type: Text Fill In Blank Maximum Score: 5 Is Case Sensitive: false Correct Answer: albedo, albido, albeedo, albedow Question: What is the term for the percentage of light reflected by something? Attempt Incorrect Feedback 1st That's not it. Hint: It starts with an a. Correct Feedback That's correct! Global Incorrect Feedback The correct answer is: albedo. -------------------------------------------------------------------------------- Question 9b of 10 ( 2 Heat Transfer 250194 ) Maximum Attempts: 1 Question Type: Text Fill In Blank Maximum Score: 5 Is Case Sensitive: false Correct Answer: reflect Question: Ice caps ______ more light than deserts, because they have a higher albedo. Attempt Incorrect Feedback 1st Correct Feedback That's correct! Global Incorrect Feedback The correct answer is: reflect. -------------------------------------------------------------------------------- Question 9c of 10 ( 2 Heat Transfer 250195 ) Maximum Attempts: 1 Question Type: Text Fill In Blank Maximum Score: 5 Is Case Sensitive: false Correct Answer: albedo, albido, albeedo, albedow Question: Earth has an ______ of about 30 percent, reflecting much of the sun's radiation back into space. Attempt Incorrect Feedback 1st Correct Feedback That's correct! Global Incorrect Feedback The correct answer is: albedo. -------------------------------------------------------------------------------- Question 10a of 10 ( 3 Carbon Cycle 185424 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: What causes the greenhouse effect? Choice Feedback A. Ultraviolet light cannot transmit through the atmosphere. That's not it. Ultraviolet light does not cause the greenhouse effect. *B. Infrared light cannot transmit through the atmosphere. That's correct! C. Earth radiates mostly ultraviolet light. That's not it. Earth radiates mostly infrared light. D. Visible light is trapped within the atmosphere. That's not it. Visible light is not trapped within the atmosphere. Global Incorrect Feedback The correct answer is: Infrared light cannot transmit through the atmosphere. -------------------------------------------------------------------------------- Question 10b of 10 ( 3 Carbon Cycle 250183 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: What causes the greenhouse effect? Choice Feedback A. Earth radiates mostly visible light. That's not it. Earth does not radiate much visible light. *B. Earth radiates mostly infrared light. That's correct! C. Ultraviolet light cannot transmit through the atmosphere. That's not it. It can transmit through the atmosphere. D. Visible light can escape the atmosphere. That's not it. This does not contribute to the greenhouse effect. Global Incorrect Feedback The correct answer is: Earth radiates mostly infrared light. -------------------------------------------------------------------------------- Question 10c of 10 ( 3 Carbon Cycle 250191 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: What causes the greenhouse effect? Choice Feedback A. Visible light cannot transmit through the atmosphere. That's not it. Visible light can transmit through the atmosphere. *B. Earth's radiated light cannot escape the atmosphere. That's correct! C. The sun radiates mostly ultraviolet light. That's not it. This is not correct. D. Radiated ultraviolet light can transmit through the atmosphere. That's not it. This does not contribute to the greenhouse effect. Global Incorrect Feedback The correct answer is: Earth's radiated light cannot escape the atmosphere. --------------------------------------------------------------------------------