grade 8_unit 12_ TH MLH

1. In 1957 the Soviet Union launched the first satellite to _______ the earth.

• A. move

• B. orbit

• C. travel

• D. fly

2. If _______ existed and were living out there, what types of signals would they send us?

• A. scientists

• B. astronauts

• C. aliens

• D. explorers

3. Besides being renewable, solar energy is the _______ energy source on Earth.

• A. resourceful

• B. limited

• C. countless

• D. plentiful

4. The Universe contains many billions of galaxies, each containing billions of _______.

• A. meteors

• B. stars

• C. black holes

• D. planetary systems

5. NASA’s _______ with special specifications can travel on the moon’s bumpy surface

• A. space buggy

• B. space shuttle

• C. space vehicle

• D. spacecraft

6. The _______ is the centre of the Solar System, making up around 99.86% of the its mass.

• A. Earth

• B. Sun

• C. Moon

• D. Mars

A _______ is a supposed type of flying craft having a disc-shaped body

• A. comet

• B. meteor

• C. UFO

• D. flying saucer

8. Astronauts can’t breathe in _______ outer space, so they have to wear a spacesuit with an oxygen tank

• A. weightless

• B. thoughtless

• C. powerless

• D. airless

airless

9. All of the planets in our Solar System, except for _______, were named after Greek and Roman gods

• A. Neptune

• B. Jupiter

• C. Earth

• D. Venus

10. If we don’t take _______ care of planet Earth, it mightn’t be able to support human life someday.

• A. appropriate

• B. essential

• C. special

• D. voluntary