bk 6 ch4

Which of the following launched the first artificial satellite of the world?

• The Soviet Union

• The US

• China

• Germany

Which of the following telescopes receives radio waves emitted by celestial bodies?

• Refracting telescopes

• Reflecting telescopes

• Radio telescopes

Rockets produce a large amount of gas when launched. This results in a pushing force which pushes the rocket ______.

Artificial satellites orbit the ______ to explore our surroundings.

In 1969, two ______ astronauts first landed on the Moon.

A large amount of gas is produced when a rocket takes off, which creates a ______ force to launch the rocket into space.

• action

• reaction

• gravitational

• the

The International Space Station came into operation in _______.

• 2000

• 2003

• 2020

• 2023

When a rocket takes off, the ______ burns to produce a large amount of gas.

Which planet in the Solar System has a dim ring?

The Earth rotates on an _______________.