B16

Question 1

Why must material in the living world be recycled

Answer 1

Material in the living world must be recycled to provide the building blocks for future organism

Question 2

What chemical elements are recycled when animals and plants decay

Answer 2

Carbon in the air
Mineral ions like nitrates
Oxygen,hydrogen and nitrogen

Question 3

What uses carbon dioxide from the atmosphere and why?

Answer 3

Carbon dioxide is used by plants during photosynthesis to allow the plant to survive.

Question 4

Why is the water cycle important

Answer 4

The water cycle allows pants and animals to gain fresh water on land before it drains into seas. The cycle is continuous and water is constantly evaporated, condensated and precipitated

Question 5

What is the role of photosynthesis in the carbon cycle?

Answer 5

Photosynthesis removes the carbon dioxide from the atmosphere by absorbing the carbon to give nutrients to plants

Question 6

What is the role of respiration in the carbon cycle?

Answer 6

Respiration puts back carbon in the atmosphere from the breathing out of animals

Question 7

What is the role of combustion in the carbon cycle?

Answer 7

Combustion releases carbon dioxide into the atmosphere by burning fossil feels which contain carbon