Practice explaining how photosynthesis and respiration help plants and animals get and use energy.
Read each problem carefully. Use complete sentences when explaining your thinking. Show your work in the space provided.
How plants make food and how living things release energy
Biology - Grade 4-5
- 1
Plants use sunlight, water, and carbon dioxide to make sugar and oxygen. What is this process called?
- 2
Write the three main things a plant needs for photosynthesis.
- 3
What gas do plants release during photosynthesis that animals need to breathe?
- 4
A student covers one leaf on a plant with dark paper and leaves another leaf uncovered. After a day in sunlight, which leaf will make more sugar? Explain why.
- 5
Cellular respiration is how living things release energy from sugar. What two things are usually needed for cellular respiration?
- 6
Circle the statement that is true: A) Only animals do respiration. B) Plants and animals both do respiration. Explain your choice.
- 7
Complete this word equation for photosynthesis: carbon dioxide + water + light energy makes blank + oxygen.
- 8
Complete this word equation for respiration: sugar + oxygen makes carbon dioxide + water + blank.
- 9
Look at a leaf. Tiny openings on leaves let gases move in and out. What are these openings called, and why are they important?
- 10
Chlorophyll is a green substance in leaves. What job does chlorophyll do during photosynthesis?
- 11
During the day, a healthy green plant is doing photosynthesis and respiration. Which process uses carbon dioxide, and which process releases carbon dioxide?
- 12
A plant is kept in a closet for one week and gets water but no light. Predict what may happen to the plant and explain why.
- 13
Match each process with its main purpose. Photosynthesis: makes sugar or releases energy. Respiration: makes sugar or releases energy.
- 14
The diagram shows a simple cycle between plants and animals. Plants give off oxygen. Animals give off carbon dioxide. Explain how this helps both living things.
- 15
Explain one way photosynthesis and respiration are connected.