Question

directions: read each question carefully, and record your answers at the bottom of the paper. you may use your notes from your binder, but no phones, laptops, or any other electronic device may be used
question 1: the table below shows three carbon - cycle processes. how do all three of the processes listed in the table affect another geochemical cycle?
a. they affect the water cycle by adding water to the atmosphere.
b. they affect the water cycle by removing water from the atmosphere.
c. they affect the oxygen cycle by adding oxygen to the atmosphere.
d. they affect the oxygen cycle by removing oxygen from the atmosphere.
question 2: the picture shows an ocean bay food chain. sea otters move into the ocean bay. they will eat the sea urchins. this change will cause
a. kelp to have less food.
b. crabs to have more food.
c. sea ducks to have less food.
d. arctic foxes to have more food.
question 3: leaves fall from deciduous trees in autumn. the carbon in these leaves is returned to the atmosphere through which of the following processes?
a. condensation
b. decomposition
c. photosynthesis
d. transpiration
question 4: in one of the steps of the carbon cycle, a person exhales a molecule of carbon dioxide (co₂) into the atmosphere. which of the following is most likely to happen next to the atom of carbon in this molecule?
a. it may be used as part of a sugar in a plant.
b. it may become part of a protein in an animal.
c. it may be consumed as a fossil fuel is burned.
d. it may be decomposed into carbon and oxygen by a bacterium.
record answers here
1.
2.
3.
4.

Explanation:

1. Animal respiration, volcanic eruption and fossil - fuel combustion consume oxygen, affecting oxygen cycle.
2. Sea otters eating sea urchins reduces sea urchin population, so sea ducks have less food.
3. Decomposition of leaves returns carbon to atmosphere.
4. Plant photosynthesis may use exhaled CO₂ to make sugar.

Answer:

1. D
2. C
3. B
4. A