unit 21

Question 1

Column1

Answer 1

Column2

Question 2

accident

Answer 2

An accident is unexpected and may cause some trouble. He damaged the car in an accident.

Question 3

astronaut

Answer 3

An astronaut is a person who goes into outer space. The astronaut was walking on the moon.

Question 4

awake

Answer 4

adj. A person who is awake is not asleep. Sometimes I lay awake in bed because I am not tired.

Question 5

courage

Answer 5

Courage is the feeling of not being afraid. The man had the courage to touch the lion.

Question 6

float

Answer 6

v. To float is to move on top of water without sinking. The boy’s toy boat floated in the pool.

Question 7

grant

Answer 7

To grant something is to allow someone to have it. The teacher granted us a break after studying hard all day.

Question 8

gravity

Answer 8

Gravity is the force that makes things fall to Earth. There is no gravity in space.

Question 9

jewel

Answer 9

A jewel is a beautiful stone that is worth a lot of money. A diamond is one of the most expensive jewels in the world.

Question 10

miner

Answer 10

TI. A miner is a person who works in a mine. The miner was looking for gold.

Question 11

mineral

Answer 11

A mineral is a type of substance found in the Earth. Rocks are made up of different kinds of minerals.

Question 12

participate

Answer 12

V. To participate is to be active and do something. The students participated in the school play.

Question 13

permission

Answer 13

n. Permission means the act of allowing some action. I have permission to drive my mom’s car.

Question 14

pour

Answer 14

v. To pour a liquid means to make it come out of a container. I poured some milk into my sister’s cup.

Question 15

raw

Answer 15

adj. A raw material is natural and has not been processed. The company dumped raw sewage into the river.

Question 16

satellite

Answer 16

n. A satellite is a machine sent into space to get information. The satellite was traveling around the Earth.

Question 17

scale

Answer 17

n. The scale of something is its size especially when it is very large. I was surprised by the scale of the buildings in the downtown area.

Question 18

skip

Answer 18

v. To skip something is to not do it. He skipped work to get more sleep.

Question 19

stretch

Answer 19

v. To stretch is to make your arms or legs reach out. She stretched her body before exercising.

Question 20

telescope

Answer 20

n. A telescope is a tool people use to look at the stars. With a telescope you can see the moon and stars easily.

Question 21

underground

Answer 21

adv. An underground action happens below the surface of the Earth. Subway trains travel underground.