11a. Imagine you are conducting a lab investigation with a plant that grows in water. You get aquarium water and a few sprigs of the plant from an aquarium shop. You put the container with the plant and the water in bright light and observe it for a week. At first, you see bubbles forming. What must those bubbles be?

Question

11a.  Imagine you are conducting a lab investigation with a plant that grows in water.  You get aquarium water and a few sprigs of the plant from an aquarium shop.  You put the container with the plant and the water in bright light and observe it for a week.  At first, you see bubbles forming.  What must those bubbles be?

(1 point)
Responses

carbon dioxide gas
carbon dioxide gas

hydrogen gas
hydrogen gas

oxygen gas
oxygen gas

glucose sugar
glucose sugar
Question 2
11b.  After a while, you notice the bubbles are no longer forming.  You ask your teacher how to make the plant start producing bubbles again, and she tells you to blow through the straw into the water.  Why did she suggest that?(1 point)
Responses

Blowing through the straw removes carbon dioxide from the water.
Blowing through the straw removes carbon dioxide from the water.

Blowing through the straw removes oxygen from the water.
Blowing through the straw removes oxygen from the water.

Blowing through the straw removes glucose from the water.
Blowing through the straw removes glucose from the water.

Blowing through the straw adds more carbon dioxide to the water.
Blowing through the straw adds more carbon dioxide to the water.

Blowing through the straw adds glucose to the water.
Blowing through the straw adds glucose to the water.
Question 3
11c.  What process have you been observing?(1 point)
Responses

decomposition
decomposition

sedimentation
sedimentation

cellular respiration
cellular respiration

photosynthesis

GPT-4o mini · Answer

**Question 1 (11a):** The bubbles forming in the water are most likely **oxygen gas**. This is because the plant is likely undergoing photosynthesis, where it consumes carbon dioxide and releases oxygen as a byproduct when exposed to light. **Question 2 (11b):** Your teacher suggested blowing through the straw into the water because **blowing through the straw adds more carbon dioxide to the water**. This additional carbon dioxide can help restart the process of photosynthesis in the plant, leading to the formation of bubbles again. **Question 3 (11c):** The process you have been observing is **photosynthesis**. This is the process by which plants use sunlight to convert carbon dioxide and water into glucose and oxygen, which is evidenced by the formation of bubbles in your experiment.