Measuring Environmental Change

Question 1

An organisms that is very sensitive to its environment can be used as a…

Answer 1

biological indicator or living indicator

Question 2

When we say an organism is very sensitive to its environment we mean..

Answer 2

It cannot live in some conditions

Question 3

What is a lichen?

Answer 3

A plant-like organism that grows on rocks, buildings and tree bark

Question 4

Lichen will only grow in areas with…

Answer 4

clean air

Question 5

Lichen are sensitive to what type of pollution?

Answer 5

Air pollution

Question 6

The pollution in the air that lichen cannot stand is…

Answer 6

sulfur dioxide

Question 7

If there are lots of lichen growing in an area what does it mean?

Answer 7

The air is clean

Question 8

If there is a lot of sewage in a river then there will be…

Answer 8

low oxygen levels

Question 9

Maylfy larvae are insect-like organisms that live in..

Answer 9

rivers

Question 10

Maylfly larvae can only survive in..

Answer 10

clean river water with lots of oxygen

Question 11

If a river has low oxygen then it must be…

Answer 11

polluted

Question 12

If mayfly larvae are found in a rive then it must be…

Answer 12

clean

Question 13

Sludgeworms are found in..

Answer 13

polluted water

Question 14

If you find sludge worms in a river then the river must be…

Answer 14

polluted

Question 15

Sludge worms can survive in polluted water because…

Answer 15

they can survive with low oxygen levels.

Question 16

Give 3 examples of non living indicators

Answer 16

Satellites to measure sea temperature
Rainfall gauges to measure rainfall
Dissolved oxygen meters to measure river pollution.

Question 17

How does a dissolved oxygen meter tell us how polluted a river is?

Answer 17

Because if there is a low level of oxygen the river is polluted.