Topic 9- Ecosystems and Material Cycles Flashcards Preview

GCSE Biology - Edexcel > Topic 9- Ecosystems and Material Cycles > Flashcards

Flashcards in Topic 9- Ecosystems and Material Cycles Deck (56)
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1

Which term describes organisms, such as plants or algae, that make their own food?
Why can plants and algae make their own food?

producers

2

Which term describes organisms that get their food by eating other organisms?

cells contain chlorophyll/carry out photosynthesis

3

Which term describes animals that eat plants or algae?

herbivores/primary consumers

4

Which term describes animals that kill and eat other animals?

predators/carnivores/secondary consumers

5

Name a type of diagram that shows the feeding relationships between organisms.

food chain/food web

6

Which scientific term means all the organisms and the environment they interact with?

ecosystem

7

Which scientific term means all individuals of the same species living in a particular area?

population

8

Which piece of equipment could be used to investigate the number of plants in an area?

quadrat

9

Which term describes all the animals, plants, other organisms, rain, soil and other factors in a rainforest?

ecosystem

10

Which term describes all the organisms living in a lake?

community

11

Groups of the same species living in different areas are different … ?

populations

12

In a food web, which term describes organisms that feed on plants?

herbivores/primary consumers

13

What term describes how one species needs other species in the same habitat for its survival?

interdependence

14

In a study of abundance of small plants in a field, samples would be taken using which piece of equipment?

quadrat

15

What is the scientific term for the feeding levels in a food chain?

trophic levels

16

Which type of diagram displays the biomass in all the different levels of a food chain?

pyramid of biomass

17

Which term measures the dry mass of all living tissue in an organism?

biomass

18

Name the source of energy that is transferred to plants.

light/Sun

19

Which term describes any living part of an ecosystem?

biotic

20

Which trophic level forms the bottom level of a pyramid of biomass?

producers

21

Which energy transfer is least useful for organisms?

to environment by heating

22

How do you calculate the efficiency of energy transfer between trophic levels?

energy transferred to biomass divided by total energy supplied to organism

23

Name two resources that plants need from their environment.

any two from: light, water/rainfall, space, nutrients, warmth/temperature, carbon dioxide, oxygen/air

24

Which term describes something that has been added to the environment, causing harm to the organisms?

pollution/pollutant

25

Which method can be used to study the distribution of organisms (how they are spread) in a straight line through an ecosystem?

belt transect

26

Give two examples of abiotic factors that affect organisms.

any two from: light, water/rainfall, space, nutrients, warmth/temperature, carbon dioxide/oxygen concentration

27

Is predation an abiotic or biotic factor in ecosystems?

biotic

28

Which term describes the struggle between organisms for a limited resource?

competition

29

Give one example of a limited resource that animals might struggle with each other for.

any suitable example, such as: mates, nesting space, food, water

30

Give one example of a limited resource that plants might struggle with each other for.

any suitable example, such as: light, water, nutrients