Unit 5 Test Vocab & Grammar Revision

to hold something inside

• contain

• investigate

• control

• spread

to hold something inside

a test that people do to find out how things work

• experiment

• population

• competition

• balance

a test that people do to find out how things work

to find out about something

• investigate

• invade

• contain

• control

to find out about something

living things live and grow their naturally

• species

• native

• humid

• threatened

living things live and grow their naturally

to take something over without permission

• introduce

• decompose

• invade

• investigate

to take something over without permission