End Of Half Term Test

Question 1

What’s the function of the roots on a plant

Answer 1

1) absorb water and minerals

2) anchor the plant so it doesn’t fall

Question 2

What’s the function of the leaf on a plant

Answer 2

Makes food by photosynthesis

Question 3

What’s the function of the flower on a plant

Answer 3

Reproduction

Question 4

What’s the function of the stem on a plant

Answer 4

1) connects the plant structures to each other

2) holds the plant up

Question 5

What’s biomass

Answer 5

Biomass is the dry weight of a living thing. It’s what you are left with when you suck all the liquid out of it

Question 6

How is the palisade cell adapted for photosynthesis

Answer 6

It has many Chloroplasts

Question 7

Why does a leaf have veins?

Answer 7

Transport substances around the leaf

Question 8

Why is a lead flat and broad

Answer 8

More light can reach the leaf as the surface area is bigger

Question 9

Why is a leaf green

Answer 9

Because it contains chloroplasts which contain chlorophyll

Question 10

Why is a leaf thin

Answer 10

So that light can be let through and so substances don’t have to move far

Question 11

Why is a leaf waxy

Answer 11

There is a waxy layer on the top of the leaf to reduce water loss

Question 12

Why are there many chloroplasts in a leaf?

Answer 12

They are needed for photosynthesis

Question 13

What the function of the stomata

Answer 13

These little holes allow gases to move into and out of the plant

Question 14

How do you know is a leaf has starch in it

Answer 14

• place the leaf in a water bath for 1 minute
• put the leaf at the bottom of a boiling tube filled with ethanol(ethanol will remove the chlorophyll from the leaf so it’s not green)
• stand the bowling tube in a water bath
• 5 minutes later check the leaf . If it’s not green anymore remove the leaf from the bowling tube
• rinse it under cold water and place the leaf on a white tile
• add iodine to the leaf, completely covering it
• if a blue/ black colour appears that means starch is present

Question 15

Which layer contains the most chloroplasts

Answer 15

Palisade layer

Question 16

Which layer possesses the stomata

Answer 16

Lower epidermis

Question 17

How is starch made in a plant

Answer 17

Photosynthesis makes glucose, which is stored as starch

Question 18

How does water enter the plant

Answer 18

Water enters the root hair cells by osmosis

Question 19

Where does the water go after it has entered the osmosis

Answer 19

It travels up the xylem vessels and finally, it diffuses out of the stomata as water vapour. This is known as transpiration

Question 20

Name 5 reasons plants need water

Answer 20

1) photosynthesis
2) opening and closing the stomata
3) to form fruits
4) to support the plant
5) to transport minerals

Question 21

how is the leaf adapted for gas exchange

Answer 21

1) Has a stomata so carbon dioxide can go in
2) Has air spaces so gases can get around
3) Leafs are thin so gases don’t have to travel very far and they can get there fast

Question 22

How does carbon dioxide enter the leaf

Answer 22

Enters the leaf through the stomata. It moves from an area of high concentration to low concentration. We call this diffusion

Question 23

What is the word equation for respiration

Answer 23

Oxygen + glucose——-> carbon dioxide + water + energy

Question 24

Name 3 uses of glucose

Answer 24

1) To release energy through respiration
2) To make cellulose to strengthen cell walls
3) To make protiens such as enzymes and chlorophyll