B17

Question 1

What is a predator?

Answer 1

An animal that naturally preys on others

Question 2

What is prey?

Answer 2

An animal that is hunted and killed by another for food

Question 3

What is a producer?

Answer 3

Organisms that can produce biomass for themselves, usually by photosynthesis

Question 4

What is a consumer?

Answer 4

Organisms that have to consume other organisms

Question 5

What are decomposers?

Answer 5

Decomposers are a group of microorganisms whom feed on waste droppings and dead organisms

Question 6

What do decomposers feed on?

Answer 6

Waste droppings and dead organisms

Question 7

Why is decomposition important

Answer 7

Chemicals that make up living organisms are recycled to be used to make all future living material.

Question 8

What are detritovores?

Answer 8

They start the decaying process but also leave faeces for fungi to eat

Question 9

What sort of chemical elements are recycled by decomposers?

Answer 9

Carbon dioxide, oxygen, nitrogen and hydrogen

Question 10

Describe what happens during evaporation.

Answer 10

Water is heated by the sun and rises into the air

Question 11

Describe what happens during condensation.

Answer 11

Water cools and becomes water droplets

Question 12

Describe what happens during precipitation.

Answer 12

The water has become heavey and starts falling back to earth.

Question 13

Describe what happens during transpiration and respiration.

Answer 13

Water is released by the plant and rises

Question 14

Describe what happens during percolation.

Answer 14

Fallen water infiltrates soil and rock.

Question 15

What is the role of photosynthesis in the carbon cycle?

Answer 15

Photosynthesis is the only way CO2 can be brought into living organisms as CO2 reacts with glucose in the plant to make energy and O2

Question 16

What is the role of respiration in the carbon cycle?

Answer 16

When an animal respires the release CO2 into the atmosphere allowing plant to take in CO2 to use for photosynthesis

Question 17

What is the role of combustion in the carbon cycle?

Answer 17

Combustion is when humans find fossil fuels in the Earth and use it to make electricity by burning it. This release an excess amount of CO2 in the atmosphere, warming up the planet

Question 18

Conditions of Decay

Answer 18

Temperature
Moisture
Oxygen

Question 19

How and why does Temperature effect the rate of decay?

Answer 19

Temperature effects the rate of decay in a similar way to how temperature effects the rate of reactions. As the temperature increases the rate of decay increases up to a point. However, if the temperature goes above 4O degrees, the rate of decay will stop as enzymes will denature.

Question 20

How and why does moisture effect the rate of decay?

Answer 20

Most microorganisms grow faster in moist conditions. The moisture makes it easier for them to digest their food and prevent them from drying out.

Question 21

How and why does oxygen effect the rate of decay?

Answer 21

Although most microorganisms are anaerobic, most decomposers respire aerobically. This means they need oxygen to transfer energy, grow and reproduce.