Free Printable Quiz #2: Cycles, Respiration, and Photosynthesis

1.

Which process in plants uses sunlight to convert carbon dioxide and water into glucose and oxygen?

a)

Photosynthesis

b)

Cellular respiration

c)

Fermentation

d)

Transpiration

2.

What is the main gas released during cellular respiration?

a)

Oxygen

b)

Carbon dioxide

c)

Nitrogen

d)

Hydrogen

3.

Which stage of the water cycle involves water vapor cooling and changing into liquid droplets?

a)

Evaporation

b)

Condensation

c)

Precipitation

d)

Infiltration

4.

Where in the cell does cellular respiration primarily take place?

a)

Nucleus

b)

Mitochondria

c)

Chloroplast

d)

Ribosome

5.

Which of the following is a product of photosynthesis?

a)

Glucose

b)

Carbon dioxide

c)

Water

d)

ATP

6.

Which process returns carbon dioxide to the atmosphere as part of the carbon cycle?

a)

Photosynthesis

b)

Cellular respiration

c)

Transpiration

d)

Nitrogen fixation

7.

Which of the following is an important process in the nitrogen cycle?

a)

Nitrogen fixation

b)

Photosynthesis

c)

Cellular respiration

d)

Evaporation

8.

Which of the following is the correct balanced chemical equation for cellular respiration?

a)

$6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2$

b)

$C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O + \text{energy}$

c)

$6O_2 + 6H_2O \rightarrow 6CO_2 + C_6H_{12}O_6$

d)

$C_6H_{12}O_6 + 6CO_2 \rightarrow 6O_2 + 6H_2O$

9.

Which component of the carbon cycle is responsible for removing carbon dioxide from the atmosphere?

a)

Decomposition

b)

Photosynthesis

c)

Combustion

d)

Respiration

10.

Which of the following best explains why photosynthesis is important for the Earth's climate?

a)

It produces oxygen for animals to breathe.

b)

It removes carbon dioxide, a greenhouse gas, from the atmosphere.

c)

It provides food for herbivores.

d)

It increases the amount of water vapor in the air.

11.

A plant is placed in a sealed container with only water and sunlight. After several hours, what change would you expect in the levels of oxygen and carbon dioxide inside the container? Explain your reasoning.

a)

Oxygen increases, carbon dioxide decreases due to photosynthesis.

b)

Oxygen decreases, carbon dioxide increases due to respiration.

c)

Both oxygen and carbon dioxide increase.

d)

Both oxygen and carbon dioxide decrease.

12.

A student claims that removing all plants from an ecosystem would have no effect on the carbon cycle. Use your knowledge of photosynthesis and the carbon cycle to evaluate this claim.

a)

The claim is correct because animals can still perform respiration.

b)

The claim is incorrect because plants remove carbon dioxide from the atmosphere through photosynthesis.

c)

The claim is correct because decomposers can replace plants.

d)

The claim is incorrect because plants add carbon dioxide to the atmosphere.

13.

If the rate of cellular respiration in an ecosystem increases significantly, what is the most likely effect on atmospheric carbon dioxide levels? Justify your answer.

a)

Carbon dioxide levels will decrease because more oxygen is produced.

b)

Carbon dioxide levels will increase because more is released during respiration.

c)

Carbon dioxide levels will stay the same because photosynthesis balances it.

d)

Carbon dioxide levels will decrease because less is used in respiration.

14.

A scientist observes that a pond ecosystem has a sudden increase in algae growth. How might this affect the oxygen levels in the pond during the day and at night? Use your understanding of photosynthesis and respiration to explain.

a)

Oxygen levels will increase during the day due to photosynthesis and decrease at night due to respiration.

b)

Oxygen levels will decrease during the day and increase at night.

c)

Oxygen levels will remain constant throughout the day and night.

d)

Oxygen levels will decrease both during the day and at night.

15.

The phosphorus cycle is critical to life. What are two molecules that need phosphorus?

a)

DNA and ATP

b)

Glucose and Lipids

c)

Water and Oxygen

d)

Water and DNA

16.

Which of the following best describes the relationship between the location and the equation of cellular respiration?

a)

Cellular respiration occurs in the chloroplast and uses $6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2$ .

b)

Cellular respiration occurs in the mitochondria and uses $C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O + \text{energy}$ .

c)

Cellular respiration occurs in the nucleus and uses $C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O + \text{energy}$ .

d)

Cellular respiration occurs in the ribosome and uses $6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6 + 6O_2$ .

Quiz #2: Cycles, Respiration, and Photosynthesis

Total questions: 16

Worksheet time: 16mins

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