CB9 Year 10 - Ecosystems And Material Cycles

Question 1

What is an individual

Answer 1

A single organism

Question 2

What is a population

Answer 2

All the organisms of one species in a habitat

Question 3

What is a community

Answer 3

All the organisms of different spices living in a habitat

Question 4

What is interdependence

Answer 4

Organisms that depend on each other for vital resources such as food shelter and safety

Question 5

What are the two types of interdependent relationships

Answer 5

Mutualism and parasites

Question 6

What is a mutualism relationship

Answer 6

A relationship between two organisms where both organisms benefit

Question 7

What is a parasitic relationship

Answer 7

Where a parasite benefits off of the relationship with a host but the host doesn’t benefit

Question 8

Give an example of a mutualist relationship

Answer 8

Bees spread pollon in flowers with allows them to reproduce and bees get nectar which is their food

Question 9

Give an example of a pasitic relationship

Answer 9

Fleas which feed off of the blood of mammals such as dogs providing them with food and taking away the dogs blood

Question 10

What is a biotic factor

Answer 10

A living factor

Question 11

What is an abiotic factor

Answer 11

A non living factor

Question 12

Give two examples of abiotic factors

Answer 12

Temperature

Amount of water

Question 13

Give two examples of biotic factors

Answer 13

Competition

Predation

Question 14

What is an eco system

Answer 14

All the organisms and the environment in which they live

Question 15

What is a quadrat used for

Answer 15

Comparing how common an organism is in two sample areas

Question 16

Why does the quardinates to the placement of a quadrat have to be random

Answer 16

So there is no human biast

Question 17

What are the 5 steps to using a quadrat

Answer 17

Place the quadrat on a random point in your first sample area

Count all of the selected organisms

Do this multiple times to get a table of data

Do the same with the second sample area

Find the mean results and compare them

Question 18

How do you find the estimated number of organisms in an area

Answer 18

Work out the mean number of organisms per metre saquared

Multiply the mean per metre squared by the total area

Question 19

What are the two methods of studying distribution

Answer 19

Belt transept

Quadrat

Question 20

What are belt transept used for

Answer 20

Finding the distribution along a gradient

Question 21

What is biodiversity

Answer 21

The variety of living organisms in an ecosystem

Question 22

How can human activities reduce biodiversity in the form of fertilisers

Answer 22

Fertilisers can leach into water causing algae to grow, this will block sunlight from below aquatic plants preventing them from photosynthesis. This will kill these plants which will inturn kill the fish because the plants were making them oxygen.

Question 23

How can fish farms reduce biodiversity

Answer 23

Predators of the fish caught in the nets can approach causing them to also get stuck in the nets

Question 24

How can non indigenous species reduce biodiversity

Answer 24

Non indigenous species can compete with indigenous species for resources such as food water and shelter

Question 25

Give two ways humans can conserve biodiversity

Answer 25

Reforestation and conservation schemes

Question 26

Give three examples of benefits of maintaining biodiversity

Answer 26

Protecting human food supply
Providing future medicines
Bringing new jobs

Question 27

List three ways carbon can be put in the air

Answer 27

Combustion of fossil fuels
Repiration
CO2 from decay

Question 28

List the only way carbon is produced back into the wildlife

Answer 28

Photosynthesis

Question 29

Name all five steps from water being evaporated to water returning to the ocean in the water cycle

Answer 29

Evaporation
Condensation
Precipitation - rain
Surface run off - water flowing along the ground
Ground flow water - water flowing in the ground

Transpiration - water being evaporated from trees

Question 30

Name two ways to add nitrates to soil

Answer 30

Crop rotation

Fertilisers