B8 - Photosynthesis

Question 1

What does photosynthesis use to turn carbon dioxide and water into glucose and oxygen?

Answer 1

Energy

Question 2

What does photosynthesis use energy for?

Answer 2

To change carbon dioxide and water into glucose and oxygen

Question 3

Is the process of photpsynthesis exothermic or endothermic?

Answer 3

Endothermic

Question 4

Why is the process of photosynthesis endothermic?

Answer 4

Because it absorbs energy from sunlight

Question 5

Why is the process of photosynthesis endothermic?

Answer 5

Because it absorbs energy from sunlight

Question 6

What is the word equation for photosynthesis?

Answer 6

Carbon dioxide + water ——–» glucose + oxygen

Question 7

What is the symbol equation for photosynthesis?

Answer 7

6CO2 + 6H20 ———> C6H12O6 + 6O2

Question 8

What are the 5 main ways plants use glucose?

Answer 8

For respiration
Making cellulose
Making animo acids
Storing as fats and oils
Stored as starch

Question 9

Why do plants convert glucose into cellulose?

Answer 9

To make the plant cell wall strong

Question 10

How do plants make animo acids using glucose?

Answer 10

The glucose is combined wirh nitrate ions that are absorbed from the soil

Question 11

Where can starch be stored in a plant?

Answer 11

The roots, stems or leaves

Question 12

Why is glucose turned into starch for storage?

Answer 12

For environments where the plant cant photosynthesise - like winter

Question 13

Why does the plant use starch for storage instead of just using glucose?

Answer 13

Starch is insoluble, so osmosis cant affect the plants water balance

Question 14

What are 4 limiting factors that effect the rate of photosynthesis?

Answer 14

Light intensity
CO2 concentration
Temperature
Amount of chlorophyll

Question 15

What does a limiting factor mean?

Answer 15

Any factor that stops photosynthesis from happening faster

Question 16

Name a scenerio where light intensity would be a limiting factor for photosynthesis

Answer 16

Night time

Question 17

Name a scenerio where temperature would be a limiting factor for photosynthesis

Answer 17

Winter time

Question 18

How can the amount of chlorophyll be affected in a plant?

Answer 18

If the plant has:
A disease
Or a lack of nutrients

Question 19

What is the inverse square law equation that links light intensity and distance

Answer 19

Light intensity (is directly proportioal to symbol) 1/ distance(squared

Question 20

What is the most common way to artificially create the ideal environment for plants to grow?

Answer 20

Growing them in a greenhouse

Question 21

Why are greenhouses a great environment for growing plants?

Answer 21

They help trap the suns heat and make sure the temperature doesnt become a limiting factor