Unit 21

Question 1

When you are _ , you are not asleep.

Answer 1

awake

Question 2

An _ is a person that goes into outer space.

Answer 2

astronaut

Question 3

When you have_, you are not afraid.

Answer 3

courage

Question 4

To _ is to move on top of water without sinking.

Answer 4

float

Question 5

To _ something is to allow someone to have it.

Answer 5

grant

Question 6

_ is the force that makes thing fall to Earth.

Answer 6

gravity

Question 7

A _ is a beautiful stone that is worth a lot of money.

Answer 7

jewel

Question 8

A _ is a person who works in a mine.

Answer 8

miner

Question 9

A _ is a type of substance found in the Earth.

Answer 9

mineral

Question 10

To _ is to take part in something.

Answer 10

participate

Question 11

_ means the act of allowing the doing of something.

Answer 11

permission

Question 12

To _ a liquid means to make it come out of a container.

Answer 12

pour

Question 13

Someone or something’s _ it the fact they are there.

Answer 13

presence

Question 14

If a material is _, it is natural and has not been processed.

Answer 14

raw

Question 15

A _ is something that is sent into space to get information.

Answer 15

satellite

Question 16

The _ of something is its size, especially when it is very large.

Answer 16

scale

Question 17

To _ something is to not do it.

Answer 17

skip

Question 18

To _ is to make your arms or legs reach out.

Answer 18

stretch

Question 19

A _ is a tool people use to look at the stars.

Answer 19

telescope

Question 20

When something is _, it is below the surface of the Earth.

Answer 20

underground