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Flashcards in Unit 7 Deck (48)
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1

Name two factors that plants often compete with each other for

Sunlight and space

2

What is a relationship called where each species depends on other species

Interdependent

3

What is meant by the term stable community

A community with all species and environmental factors are in balance
The population size remains constant

4

What abiotic Factor could affect the distribution of animals living in aquatic areas

Oxygen levels

5

Suggest two abiotic factors that could affect the distribution of plants growing in soil

Moisture level and soil pH

6

Name one group of organisms that can live in deep sea vents where temperatures are very high

Bacteria

7

Suggest how having spines instead of leaves allows cacti to live in desert conditions

It reduces water loss

8

Suggest how having a swollen storage stem allow cacti to live in desert conditions

It helps store water

9

What is a functional adaptation

An adaptation that helps an organism Survive by carrying out normal functions

10

How does a producer produce biomass for the rest of the food chain(3)

They produce glucose by carrying out photosynthesis. It then uses glucose to make biological molecules that make up the plant biomass.

11

Why is it important that quadrats are placed randomly in a field

It avoids the data being biased

12

Describe the importance of Decay in the carbon cycle

Carbon dioxide is return back to the atmosphere when the microorganisms involved in decay respire

13

Why is a biomass generators built Underground

To regulate temperature and ensure it stays cool

14

What do gardeners use compost for
`

Fertiliser

15

Describe three conditions that gardeners should use to produce compost quickly

It should be warm with the water available and lots of oxygen

16

Define biodiversity

The variety of different species of organisms on Earth or within an ecosystem

17

State two reasons why humans are using more resources

A rising population
The standard of living is increasing

18

State two ways water can become polluted

Sewage and pesticides

19

State two substances that pollute the air when they are released into the atmosphere

Smoke and acidic gases

20

Give two reasons why using a herbicide can reduce biodiversity

It reduces the variety of plants on the land by Killing the weeds and it may kill plants and animals if it's washed into nearby water

21

Explain why a high biodiversity create a stable ecosystem

Because all the different species in the ecosystem depend on each other. Species can also help to maintain the right physical environment for each other

22

Suggest why global warming might cause land to become flooded

Higher temperatures can cause seawater to expand with good causes sea level to rise above low lying land

23

Suggest two consequences of global warming

Reduce biodiversity
Changes to the migration patterns of some animals

24

How do humans reduce the amount of land available for other plants and animals

Building and farming

25

Why are peat bogs destroyed by humans

Peat can be burnt as fuel in used as a fertiliser

26

Explain what problem burning peak cankles

It releases carbon dioxide which contribute towards global warming

27

Explain the effect that the destruction of peat bogs has on biodiversity

It reduces biodiversity because it destroys habitat or reduces the area of habitat

28

Explain why is large scale Deforestation has been required to produce biofuels

To clear land to grow their crops needed to produce biofuels

29

State two reasons for large scale deforestation

To provide land for cattle and provide land to grow crops

30

Suggest and explain two harmful effects on the environment caused by the destruction of trees

Increases the amount of carbon dioxide in the atmosphere because carbon there released by burning wood
It leads to a reduction in biodiversity because tree habitats are destroyed