Life On Earth pt1

Question 1

What is an ecosystem

Answer 1

An ecosystem includes all the living things, their non living surroundings and the factors which affect their lives

Question 2

What are biotic factors

Answer 2

Living things

Question 3

What are abiotic factors

Answer 3

Non living factors

Question 4

What is biodiversity

Answer 4

The total variation that exists among all living things

Question 5

What is a habitat

Answer 5

The place where an organism lives

Question 6

What is a population

Answer 6

A group of organisms which belong to the same species

Question 7

Community

Answer 7

All the plants and animals that live in the same habitat

Question 8

Niche

Answer 8

The role an organism plays within a community

Question 9

Producers

Answer 9

Green plants that produce their own food using photosynthesis

Question 10

Consumers

Answer 10

Organisms that eat other organisms

Question 11

What do the arrows represent in a food chain

Answer 11

The transition of energy

Question 12

What is a pyramid of biomass

Answer 12

Records the mass of the living organisms at each stage of the food chain

Question 13

Decomposing Bacteria

Answer 13

Bacteria that obtains its energy by breaking down dead organisms or waste material

Question 14

Nitrifying bacteria

Answer 14

Bacteria in the soil that convert ammonium compounds to nitrite and nitrite to nitrate

Question 15

Denitrifying bacteria

Answer 15

Bacteria in the soil that break down nitrate in the soil solution releasing nitrogen gas

Question 16

Nitrogen fixing bacteria

Answer 16

Bacteria that absorb nitrogen gas and convert it to nitrogenous compounds used by plants to make protein

Question 17

What is the order of the nitrogen cycle

Answer 17

Decomposition
Nitrification
Denitrification
Nitrogen fixation

Question 18

How can lightening affect the nitrogen cycle

Answer 18

It convertes nitrogen gas to nitrates