Quiz 1.2 Nutrient Cycles and Energy Flow

Which sequence accurately describes the carbon cycle?
1. Carbon in carbon dioxide breathed out by you>carbon dioxide absorbed by tomato plant>carbon stored in carbohydrates in tomato>tomato eaten by you
2. Carbon in carbon dioxide breathed out by you>carbon dioxide contributes to global warming>carbon released as heat and exits system
3. Carbon in the soil is fixed by bacteria into carbon dioxide>carbon is converted into nitrates>carbon absorbed by a plant>when plant dies carbon returns to soil
4. Carbon in carbon dioxide is captured by chlorophyll in a tomato plant>chlorophyll converts carbon into chemical energy>energy used to grow tomato>tomato energy consumed by you>you release energy as heat
This is a diagram of the nitrogen cycle.

Which statement about this cycle is true?
1. All the nitrogen obtained by animals can be traced back to the eating of plants
2. Nitrogen is consumed by bacteria and removed from the soil
3. Plants fix nitrates into atmospheric nitrogen gas
4. Nitrogen is continually created and destroyed
This is a diagram of the nitrogen cycle.

Which statement about this cycle is false?
1. Plants but not animals are part of the nitrogen cycle
2. Bacteria convert nitrogen gas into a form in which it can be used as a plant nutrient
3. The nitrogen cycle requires nitrogen-fixing bacteria
4. Bacteria and fungi break down dead plant and animal tissues into nitrates that plants can use
What is not a process involved in the water cycle?
1. Fixation
2. Evaporation
3. Condensation
4. Transpiration
What is a process in the water cycle that releases water into the atmosphere?
1. Transpiration
2. Seepage
3. Root uptake
4. Condensation
What statement about nutrients and elements is true?
1. All nutrient cycles consist of elements and involve living organisms at some point
2. All elements take part in nutrient cycles
3. Both nutrients and elements are continuously created and destroyed
4. Not all nutrients are composed of elements but all elements are composed of nutrients
What is the ultimate source of energy for the ecosystems on Earth?
1. The Sun
2. Oxygen
3. Nutrients
4. Plants
The following diagram shows how a typical plant uses carbon dioxide, the Sun's energy and water to create glucose.

What is this process called?
1. Photosynthesis
2. Cellular respiration
3. Transpiration
4. Nitrogen fixation
The following diagram shows how a typical plant uses carbon dioxide, the Sun's energy and water to create glucose.

Besides glucose, what else does the plant release?
1. Oxygen
2. Chlorophyll
3. Carbon dioxide
4. Water
These cows are grazing on grass.

If a cow consumes 1000 J of grass energy in a day, approximately how much of this energy will be stored in its body tissues?
1. 100 J
2. 600 J
3. 300 J
4. 1000 J