BigBook-Book 2 Unit 06 (E)

15 카드 | CompassPublishing

세트공유

attach

to connect to something
They even attach themselves to waste!

combination

a result of combining two or more things
It is a combination of a fungus and seaweed.

fungus

an organism that lives by breaking down other material
It is a combination of a fungus and seaweed.

gauge

an instrument used for measuring
Lichens are like a pollution gauge!

lichen

a type of small plant that grows on rocks
Have you heard of lichens?

powerful

having great strength
Lichens are powerful living things!

rainforest

a tropical forest with many trees
Lichens are also found in the arctic and in rainforests.

react

to act in response to something
The chemicals in lichens react with minerals in the rock.

rock

a hard, non-living substance
For example, lichens are often found on rocks.

seaweed

a plant that grows in or around water
It is a combination of a fungus and seaweed.

soil

the top layer of earth in which plants grow
This means they can survive without soil.

surface

an outside part or layer of something
Lichens absorb water through their surfaces because they do not have a root system.

therefore

as a result
therefore, scientists can tell how much pollution is in the air.

unusual

not ordinary
Lichens can survive in unusual places.

waste

garbage
They even attach themselves to waste!