Space

Question 1

Celestial body

Answer 1

Any naturally made object outside the Earths atmosphere e.g. stars, comets, moons and astroids.

Question 2

Stars

Answer 2

A star is a celestial body that generates its own light and heat and consists
of a mass of gas held together by its own gravity

Question 4

Planets

Answer 4

A planet is a celestial body that is in orbit around a star and has enough mass to
form an almost round shape due to its own gravity and have ‘cleared the region’
around its orbit of other celestial bodies.

Question 5

Galaxy

Answer 5

A galaxy is a huge collection of billions of stars and their solar systems, all held
together by gravity.

Question 6

Solar system

Answer 6

The solar system consists of the Sun and everything that orbits the Sun.

Question 7

Moons

Answer 7

A natural satellite of a planet

Question 8

Astronomy

Answer 8

Astronomy is the science that deals with the universe beyond Earth’s
atmosphere.

Question 9

Celestial body

Answer 9

Any naturally made object outside the Earths atmosphere e.g. stars,
comets, moons and astroids.

Question 10

Stars

Answer 10

A star is a celestial body that generates its own light and heat and consists
of a mass of gas held together by its own

Question 11

Planets

Answer 11

A planet is a celestial body that is in orbit around a star and has enough mass to
form an almost round shape due to its own gravity and have ‘cleared the region’
around its orbit of other celestial bodi

Question 12

Galaxy

Answer 12

A galaxy is a huge collection of billions of stars and their solar systems, all held
together by gravity.

Question 13

Solar system

Answer 13

The solar system consists of the Sun and everything that orbits the Sun.

Question 14

Moons

Answer 14

A natural satellite of a planet

Question 15

Asteroid

Answer 15

An asteroid is a small rocky body orbiting the Sun.

Question 16

Comet

Answer 16

A comet is a dusty snowball which orbits the Sun.

Question 17

The Big Bang Theory (formation of the universe)

Answer 17

• Before the big bang (14 billion years ago):
• The entire universe was smaller than a pinhead.
• It was extremely hot and dense.
• It then exploded creating time, space and matter.
• The universe expanded.
1st piece of evidence for the big bang
• In 1964, an energy called ‘cosmic background radiatio 2nd piece of evidence for the big bang
• Edwin Hubble and Vesto Slipher discovered that the universe is expanding.