2.2.1 Photosynthesis Flashcards Preview

SHHS - Science - B2.2 Ecosystem Processes - Year 8 > 2.2.1 Photosynthesis > Flashcards

Flashcards in 2.2.1 Photosynthesis Deck (23)
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1

What is a producer?

An organism that can make its own food e.g. plants and algae

2

Give 2 examples of producers.

Plants
Algae

3

By which process do plants produce their own food?

Photosynthesis

4

How are algae different to plants?

- The can be unicellular or multicellular
- They live underwater
- Algae do not have stems, roots or leaves.

5

How are plants different to algae?

- They are all multicellular
- They live mostly on land
- They have stems, roots and leaves

6

What is a consumer?

Organisms that have to eat other organisms to survive e.g. animals are consumers

7

What is the equation for photosynthesis?

Carbon dioxide + water + sunlight --> glucose + oxygen

8

Name the reactants of photosynthesis.

Carbon dioxide + water

9

Name the products of photosynthesis.

glucose + oxygen

10

Where does photosynthesis take place inside plant or algal cells?

Within the chloroplasts

11

What is the name of the green pigment found inside chloroplasts?

Chlorophyll

12

What does chlorophyll do?

Captures light energy inside the chloroplasts

13

Describe the journey of water through a plant.

- Water enters through the root hair cells of the roots.
- Water travels through tubes called xylem tubes.
- Water evapourates out of the leaves.

14

How do gases enter and exit a plant?

Through tiny holes in the underside of leaves called stomata.

15

Which gas enters leaves?

Carbon dioxide

16

Which gas exits leaves?

Oxygen

17

Name the tubes that water travels through inside plants

xylem tubes

18

Name the parts of a plant that contain chloroplasts.

Leaves
Stem (small amount)

19

Why do roots not contain chloroplasts?

Because they are underground so cannot capture sunlight.

20

Plants store the glucose produced in photosynthesis as...

starch

21

How can we test a leaf to see if it doing photosynthesis?

Use iodine on it to test for starch.

22

What colour does iodine change to if starch is present?

From orange to blue/black

23

What must we do to a leaf before putting iodine on it when testing for starch?

Heat in ethanol to remove the green chlorophyll so that we can see if the iodine changes colour.