2.2.2 Leaves Flashcards Preview

SHHS - Science - B2.2 Ecosystem Processes - Year 8 > 2.2.2 Leaves > Flashcards

Flashcards in 2.2.2 Leaves Deck (21)
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1

Why is the top surface of a leaf waxy?

To stop water escaping from the leaf.

2

Which gas diffuses into a leaf?

Carbon dioxide

3

Why are there fewer chloroplasts in the cells of the bottom side of a leaf?

Because sunlight mainly hits the top of leaves so chloroplasts aren't needed on the bottom as much.

4

Identify the diagram

The structure of a leaf

5

Stomata (holes) in leaves are opened and close by special cells called...

guard cells

6

Idenitfiy the missing label from the structure of a leaf

Stoma

(a single stomata)

7

How does being thin help a leaf to carry out photosynthesis?

Gases can move in and out of the leaf easily.

8

Idenitfiy the missing label from the structure of a leaf

Guard cell

9

Idenitfiy the missing label from the structure of a leaf

Spongy layer

10

Why is a leaf normally dark green on top but lighter on the bottom?

There are fewer chloroplasts on the bottom so there is less chlorophyll.

11

How do gases and water get in and out of a leaf?

Through holes called stomata

12

Idenitfiy the missing label from the structure of a leaf

Waxy layer

13

What is the name of the tube that carries glucose around the plant?

Phloem tubes

14

How is the structure of a leaf suited to carry out photosynthesis?

  • Contain chlorophyll to capture sunlight.
  • They are thin
  • They have a large surface area
  • They have veins

15

Name the 3 main layers of a leaf

1. Waxy layer

2. Palisade layer

3. Spongy layer

16

How do veins help a leaf to carry out photosynthesis?

They are made from xylem tubes which can transport water for photosynthesis to take place.

17

How does a large surface area help a leaf to carry out photosynthesis?

A large surface area can capture as much light as possible.

18

Idenitfiy the missing label from the structure of a leaf

Chloroplast

19

Which gases diffuse out of a leaf?

Oxygen

Water vapour

20

Idenitfiy the missing label from the structure of a leaf

Palisade layer

21

Idenitfiy the missing label from the structure of a leaf

Air space