Thanks, Leaves!

Thanks, Leaves!

Multiple Choice

In paragraph 1 of this passage, which clues help you figure out the meaning of the word vital?

• “Changes this energy”

• “Captured from the Sun”

• “Chemical change called photosynthesis”

• “Need them to survive”

Multiple Choice

Which is the best summary of the selection?

• Leaves are something to be thankful for because they produce carbohydrates.

• Leaves conduct photosynthesis, which converts energy from the Sun into chemical energy that is useful and important to humans.

• Photosynthesis is a vital part of the food chain.

• Radiant energy is the most important part of photosynthesis. It is energy from the Sun, which leaves are thankful for.

Multiple Choice

The above flow chart traces the energy transformations for the process described in paragraph 3. Which of the choices below in the order of (1), (2), (3) will correctly fill the blanks in the chart?

• Heat, Chemical, Light

• Heat, Light, Chemical

• Light, Chemical, Heat

• Chemical, Heat, Light

Multiple Choice

How is ethanol made?

• By fermenting sugars and starches

• By composting grass cuttings and dinner table scraps

• By boiling water and corn oil

• By releasing carbon dioxide into the atmosphere

Multiple Choice

What is the main point of paragraph 2?

• how photosynthesis affects humans’ food supply

• how carbohydrates cause weight gain in humans

• how humans and other animals use radiant energy from the Sun

• how carnivorous animals hunt and get energy from their prey