Transfer of Energy RETAKE

To make energy, a plant must get carbon, hydrogen, and oxygen atoms. What is the source of these atoms?

• air and soil

• water and air

• water and soil

• air and sunlight

In addition to carbon dioxide, what other two ingredients does a plant need for photosynthesis?

• water and sunlight

• water and oxygen

• sunlight and soil

• sunlight and oxygen

You and a friend walk by a tree with grass growing around it. Your friend states that the tree is larger than the grass because it is closer to the sun and it is able to take in more material. Do you agree?

• No. The tree is larger than the grass because it takes in more material from the soil.

• All plants obtain most materials for growth from water and carbon dioxide.

What is the original source of all energy for animals?

• the sun

• plants

• other animals

• sugars

Why must animals eat food but plants do not eat food?

• Plants use photosynthesis to make their own food instead of eating. Animals eat plants because they like the taste of certain fruits. 

• Plants make their own food through photosynthesis. Animals must eat because they cannot make their own food. 

• Plants do not appear to eat, but they do actually eat nutrients in the soil. Animals must eat to obtain food that they can't get from the soil. 

Do humans depend on photosynthesis? Explain how, why, or why not. 

• Yes, all of the food consumed by humans is plants or gets energy from plants, and plants produce their own food through photosynthesis.

• No, humans cannot make food by photosynthesis, so they do not depend on photosynthesis for energy. 

• No, humans rely on animals for food, and neither humans nor animals depend on photosynthesis for food. 

Which of the following models shows the flow of energy in a woodland ecosystem? Select the two correct answers. 

• sun → hawk → bird → caterpillar

• sun → tree → grass → mouse

• sun → tree → caterpillar → bird

Why is stored energy important?

• The food chain would not work if plants and animals could not store unused energy.

• Food is not scarce.

• The food chain does not include stored energy.

What does the food chain begin with?

• the moon

• the sun

• animals

• humans