B9-ecosystem And Material Cycle

Question 1

What is an ecosystem

Answer 1

Animals and plants that live within an area (habitat)

Question 2

To survive and reproduce a species need

Answer 2

Food
Water
Air
Mate

Question 3

What is abiotic

Answer 3

Non living factor

Question 4

What is biotic

Answer 4

Living factor

Question 5

What are examples of a abiotic factor

Answer 5

Light intensity 
Temperature 
Water levels
PH
ion levels 
Wind
Carbon dioxide leves
Oxygen levels

Question 6

Example of biotic factors

Answer 6

Food
Predators
Pathogens

Question 7

What do food chains start with

Answer 7

The sun

Question 8

How does a food chain work

Answer 8

Sun providing energy
After things are going to grow mainly plants and they get eaten by other things eg grass being eaten by cows then eaten by is

Question 9

What is biodiversity

Answer 9

Biodiversity is the range of plants and animals that live within a habitat

Question 10

What is the role of photosynthesis in a carbon cycle

Answer 10

Plants take in co2 by photosynthesis

Plants make carbon compounds (like glucose)from co2

Question 11

What is the role of respiration in a carbon cylce

Answer 11

Plants release co2 during reapiration
Plants are eaten by animal
Carbon is passed from organisms to organisms
Animals relase co2 during respiratiob

Question 12

What is the role of decomposition in carbon cycle

Answer 12

Microorganisms feed on dead plants and animals

Microorganisms release co2 during respiration and decomposition

Question 13

What is the role of combustion in the carbon cylce

Answer 13

Fossil fules are formed from dead plants and animal
Fossil fuels contain stored carbon
Co2 is relased into the atmosphere during combustion

Question 14

Whr effect does the burning of fosil fules have on the environment

Answer 14

-Increase co2 level and other greenhoue gases

• Decrease in heart radiated back into space
• Increase in global temperature (global warming
• glacier melting rise in sea leves ,loss of habitat loss of biodiversity

Question 15

What happens whem carbon dioxide is on the air

Answer 15

It can bd taken up by plants and this is a process of photosynthesis

Question 16

In the water cylce how does the water evaporate

Answer 16

Heat and energy from the sun comes down warms the suface of the water on the earth which causes the water to evaporate

Question 17

What is the water cycle

Answer 17

Is a process by which water moves fron the oceans to the atmosphere and then to the land and back to the oceans

Question 18

What does portable mean

Answer 18

Suitable to drink

Question 19

What is desalination

Answer 19

Is the process of removing minerals ions (like sodium)from salt water to make it portable

Question 20

How do themal desalinatio work

Answer 20

1) salt wated is heate in lage boilongchambers
2) water evaporates
3) stem rises and salts stay in the boiling chamber
4) steam flows through a condensing dome surrounded by cold water and comdenses
5) pure water is collected

Question 21

Where might solar thermal desalination be used

Answer 21

Desert nations and natioms prome to drought

Question 22

What is the definition of osmosis

Answer 22

Osmosis is the net movement of water across a partially permeable membrane from an area of high water concentration to low water concentration

Question 23

Why is filtration important

Answer 23

Filtratiom removes soild impurities

Question 24

What is reverse osmosis

Answer 24

It is a modern method of desalination

Question 25

Revers osmosis moves water into the purfiction tanks under high pressure why

Answer 25

Reverse osmosis moves water into purification tanks unde high pressure because is causes water molecules to move in the opposite direction to osmosis water is forced through the partill permabls membrane peavong behimd amd removing salts from the water

Question 26

What is the process invooled in water cyle

Answer 26

Evaporation condensation

Water flow from river to the sea