S1 - Photosynthesis and Biodiversity (complete)

Question 1

Organism

Answer 1

A living thing.

Question 2

The process used by green plants to make food.

Answer 2

Photosynthesis

Question 3

Which two substances are required for photosynthesis?

Answer 3

Carbon dioxide and water

Question 4

Which two substances are made during photosynthesis?

Answer 4

Glucose and oxygen

(glucose/carbohydrates/sugars all OK)

Question 5

The green pigment inside chloroplasts that captures light.

Answer 5

Chlorophyll

Question 6

Chloroplast

Answer 6

Tiny structure inside plant cells where photosynthesis happens.

Question 7

Release of energy from sugars that happens in cells.

Answer 7

Respiration

Question 8

Glucose

Answer 8

A type of sugar (made in photosynthesis).

Question 9

A chain of glucose molecules used as an energy store.

Answer 9

Starch

Question 10

Group of molecules including sugar and starch.

Answer 10

Carbohydrates

Question 11

A chain of glucose molecules used to build cell walls.

Answer 11

Cellulose

Question 12

Word equation for photosynthesis

Answer 12

Carbon dioxide + Water → Glucose + Oxygen

Question 13

Yellow/brown chemical used to test for starch

Answer 13

Iodine

Question 14

Ethanol

Answer 14

Alcohol - used to remove the green colour from a leaf.

Question 15

Describe the chemical test for starch

Answer 15

Iodine tuns from brown to blue/black (if starch is present)

Question 16

Steps to test if starch is present in a leaf:

1. …
2. Boil leaf in ethanol
3. Add iodine - if it turns blue/black, starch is present

Answer 16

Steps to test if starch is present in a leaf:

1. Boil leaf in water
2. Boil leaf in ethanol
3. Add iodine - if it turns blue/black, starch is present

Question 17

Steps to test if starch is present in a leaf:

1. Boil leaf in water
2. …
3. Add iodine - if it turns blue/black, starch is present

Answer 17

Steps to test if starch is present in a leaf:

1. Boil leaf in water
2. Boil leaf in ethanol
3. Add iodine - if it turns blue/black, starch is present

Question 18

Steps to test if starch is present in a leaf:

1. Boil leaf in water
2. Boil leaf in ethanol
3. …

Answer 18

Steps to test if starch is present in a leaf:

1. Boil leaf in water
2. Boil leaf in ethanol
3. Add iodine - if it turns blue/black, starch is present

Question 19

A comparison experiment used to see if something is having an effect.

Answer 19

Control experiment

Question 20

Producers

Answer 20

Plants (which trap energy using photosynthesis and use it to make molecules).

Question 21

Consumers

Answer 21

Animals which eat plants (or other animals).

Question 22

Food chains show how ______ is passed from plants to animals when the plants are eaten.

Answer 22

Food chains show how energy is passed from plants to animals when the plants are eaten.

Question 23

What can plants be used for? Suggest two uses.

Answer 23

Any of:

food/drink (e.g. potatoes)

fibres (e.g. cotton for clothing)

medicines (e.g. morphine from poppies)

building materials (e.g. bamboo)

fuels (e.g. sugarcane to make biofuels)

cosmetics and toiletries (e.g. aloe vera in skin care)

Question 24

Species

Answer 24

A group of organisms with common characteristics (features).

Question 25

Habitat

Answer 25

The place where a species can be found (where it lives).

Question 26

Biodiversity

Answer 26

The number of different species in an area.

Question 27

Distribution

Answer 27

The spread or range of organisms - where they are found.

Question 28

Ecosystem

Answer 28

The interaction between living things and their environment.

Question 29

Abundance

Answer 29

How many there are.

Question 30

Name this piece of equipment

Answer 30

Quadrat

Question 31

What are quadrats used for?

Answer 31

Sampling (e.g. counting number of flowers in a meadow)

Question 32

Name this piece of equipment

Answer 32

Choice chamber

Question 33

Choice chamber

Answer 33

Used to test which conditions are preferred by small organisms.

Question 34

Vertebrate

Answer 34

An animal with a backbone.

Question 35

Invertebrate

Answer 35

An animal without a backbone.

(e.g. insects)

Question 36

Key

Answer 36

Used to identify organisms by their characteristics.

Question 37

What type of key is this?

Answer 37

Paired statement key

Question 38

What type of key is this?

Answer 38

Branched key