Eco Systems

Question 1

What are Resources

Answer 1

What an organism needs to stay alive, oxygen, food, warmth…

Question 2

What is an ecosystem

Answer 2

All the organisms and the environment in which they live

Question 3

What is a Community

Answer 3

All the organisms that live in an ecosystem

Question 4

What is Interdependent

Answer 4

The way organisms rely on each other for resources

Question 5

What is a habitat

Answer 5

Where an organism lives

Question 6

What is an Abudance

Answer 6

A measure of how common something is

Question 7

What is a food web

Answer 7

A diagram showing the feeding relationship between organisms

Question 8

What are the resources used by plants

Answer 8

Light, Water, CO2, O2, Warmth, mineral ions

Question 9

What are the resources used by animals

Answer 9

Food, Oxygen, Water, Warmth, Shelter

Question 10

How do you calculate population size

Answer 10

Number of organism x
(Total size of area where organism lives/ total area)

Question 11

What is biomass

Answer 11

Mass of tissue

Question 12

Why is energy lost when an animal eats another animal

Answer 12

Some energy lost to heating the animal, some in its faeces

Question 13

What is a Parasitic relationship

Answer 13

Parasite lives on a host, parasites benefit by feeding of off a live host

Question 14

What is a Trophic relationship

Answer 14

Predator prey, one eats the other (Feeding)

Question 15

What is a Mutualistic relationship

Answer 15

Both benefits (Give and take)

Question 16

Why is fish farming bad

Answer 16

too many in small spaces can cause parasite to spread easily, which means fish need to be treated carefully

Question 17

What does Indigenous mean

Answer 17

Native

Question 18

What is Eutrophication

Answer 18

Adding more nutrients to an ecosystem

Question 19

How can Eutrophication result in low oxygen levels in the water

Answer 19

Excess fertilisers enters stream, causing algae to bloom on surface of stream blocking sunlight getting to the plants so they can’t photosynthesise, which means plants decompose, and bacteria use up oxygen during respiration, resulting in less oxygen

Question 20

What are two adaptations of fleas

Answer 20

Sharp claws to grip onto hair and skin,
Eggs are glued to hair to prevent them falling of

Question 21

What are two adaptations of Worms

Answer 21

Male and female sex organs
Flat bodies for fast diffusion

Question 22

What is food security

Answer 22

Having enough access to safe and healthy food at all times

Question 23

What are agricultural inputs

Answer 23

Artificial additions to agriculture, like fertilisers

Question 24

What is reforestation

Answer 24

Trees are planted after they have been chopped down

Question 25

What are field margins

Answer 25

Strips of land where wild plants and animals can live

Question 26

What do hedgerows and field margins do

Answer 26

They preserve biodiversity

Question 27

Bloodworms have a high level of haemoglobin in their blood.
Give a reason why this helps them survive in polluted water.

Answer 27

haemoglobin binds oxygen /
increases the rate of diffusion /
polluted water is low in oxygen