B-2 pgs. 52-53

a test done to learn something new

• experiment

• particle

• satellite

• infect

an extremely small piece of something

• particle

• immigrant

• germ

• article

an object sent into space that travels around the Earth used for collecting information and communicating

• satellite

• cotton

• particle

• infect

someone who has come to live in a country that they were not born in

• immigrant

• polio

• infect

• cotton

a serious disease that damages the spine

• polio

• germ

• cotton

• vaccine

to pass a disease or illness from person to person

• infect

• germ

• particle

• article

a very small living thing that causes disease

• experiment

• particle

• germ

• vaccine

a special substance you take that prevents a disease by infecting you with a weakened or dead version of the disease

• germ

• infect

• vaccine

• article

a piece of writing on a particular topic in a newspaper, magazine, or online

• article

• particle

• cotton

• immigrant

all the living and non-living things found in one place

• ecosystem

• bulb

• carbon

• transmit