Chapter 13 - Photosynthesis

Question 1

Photosynthesis

Answer 1

The way in which green plants make food

Question 2

What is the word equation for photosynthesis?

Answer 2

carbon dioxide + water —-sunlight—-chlorophyll—-> glucose + oxygen

Question 3

What are the four factors needed for photosynthesis to occur?

Answer 3

1. Carbon dioxide
2. Water
3. Light
4. Chlorophyll

Question 4

What are the products of photosynthesis?

Answer 4

1. Glucose

2. Oxygen

Question 5

What is chlorophyll?

Answer 5

○Green dye/pigment
○Mostly found in leaves and other green parts of plant
○Absorbs light and allows photosynthesis to take place

Question 6

Tropism

Answer 6

The way in which a plant changes in response to an outside stimulus

Question 7

Phototropism

Answer 7

The way in which a plant changes its growth in response to light

Question 8

Explain what the effect of phototropism is on plants

Answer 8

The shoots of a plant respond by growing towards the light. This allows the leaves to absorb as much light as possible so they can in turn make more food

Question 9

Geotropism

Answer 9

Change in the growth of a plant in response to gravity

Question 10

Explain what the effect of geotropism is on plants

Answer 10

○The shoots of a plant respond by growing away from gravity. This allows the stem to grow upright so the leaves get more light
○The roots of the plant grow towards gravity. This allows the roots to grow down into the soil and anchor the plant and absorb more minerals and water