Question

1. plants have little pores called stomata on their leaves that look like little mouths - through these they bring in ___________ and send out ___________.
2. we added carbon dioxide to both the floating leaf disc demo and the changing color solution demo. why did we need to add carbon dioxide to the demos in order for them to work?

a) the carbon dioxide stuck to the leaves and made them float.
b) the carbon dioxide was needed in order for photosynthesis to happen.
c) the carbon dioxide made the solution less acidic, so the plants could survive.

1. choose the correct statements that together connect plants and climate change:

part one: choose which of these is correct:
(a) when there is more carbon dioxide in the atmosphere, the average temperature increases.
(b) when there is less carbon dioxide in the atmosphere, the average temperature increases.
part two: choose which of these is correct:
(a) plants make more carbon dioxide, which makes climate change increase.
(b) plants absorb carbon dioxide, which helps reduce climate change.

Explanation:

• For question 8, plants take in carbon - dioxide and release oxygen through stomata during photosynthesis.
• For question 9, carbon dioxide is a key reactant in photosynthesis.
• For question 10 part one, carbon dioxide is a greenhouse gas, more of it in the atmosphere leads to higher average temperatures. For part two, plants absorb carbon dioxide during photosynthesis, which helps in reducing climate change.

Answer:

1. Carbon dioxide; Oxygen
2. b) The carbon dioxide was needed in order for photosynthesis to happen.
3. Part One: (a) When there is more carbon dioxide in the atmosphere, the average temperature increases.

Part Two: (b) Plants absorb carbon dioxide, which helps reduce climate change.