biology life on earth (1)

Question 1

Habitat

Answer 1

Where an organism lives

Question 1

Population

Answer 1

All the members of one species living in an area

Question 2

Community

Answer 2

All the living things, animals and plants, living in a particular habitat

Question 3

Ecosystem

Answer 3

Habitat and community

Question 4

Biome

Answer 4

The various regions of our planet distinguished by their climate e.g. Fresh water, desert, grassland

Question 5

Niche

Answer 5

The role an organism plays in its community

Question 6

Biotic factors

Answer 6

Factors related to living things e.g. Predation, competition and disease

Question 7

Abiotic factors

Answer 7

Non-living factors e.g. temperature, light intensity, moisture content of soil, pH of the environment

Question 8

How to use light meters

Answer 8

Hold meter at soil surface and point in the direction of light

Question 9

Using soil pH meters

Answer 9

Push the probe into the soil and reds the meter.

Question 10

Factors affecting distribution of grass

Answer 10

Grasses are found in full sunlight and not in shady woodland as they need light to photosynthesise.

Question 11

Food web

Answer 11

Complex diagram showing interconnecting food chains in a habitat

Question 12

Food chain

Answer 12

Part of a food web

Question 13

Producer

Answer 13

An organism that can make its own food. Start of a food chain.

Question 14

Consumer

Answer 14

An organism that must eat other organisms to get energy

Question 15

How is energy lost

Answer 15

Through heat, movement, reproduction and chemical reactions

Question 16

How much energy is passed on at each stage of a food chain?

Answer 16

10%

Question 17

Intraspecific Competition

Answer 17

Organisms of the same species competing for food and space

Question 18

Inter specific competition

Answer 18

Organisms of different species competing for food and space

Question 19

Human pollution

Answer 19

Decreases biodiversity

Question 20

Grazing

Answer 20

Increases biodervisity

Question 21

Sewage

Answer 21

Decreases biodervisity

Question 22

Deforestation

Answer 22

Decrease in biodervisity

Question 23

Importance of biodervisity

Answer 23

Variety of different food sources available
Medicinal plants are maintained
Raw materials are maintained
Aesthetics such as bird watching