Earth and Space

Question 1

Astromony

Answer 1

The study of matter in outer space, particularly the positions, composition, motion and energy.

Question 2

Star

Answer 2

A star is an object made up of gas. It is luminous (gives off light). Nuclear fusion reactions between Hydrogen atoms in the Sun cause it to give off light and heat.

Question 3

Planet

Answer 3

A planet is a celestial object that is in orbit around a star. In order for something to be classified as a planet it must
- be in orbit around a star
- be big enough to form an almost round shape due to its own gravity pulling it inwards
- have cleared the region around its orbit of other cellestial objects

Question 4

Our Solar System

Answer 4

TERRESTIAL
Mercury, Venus, Earth, Mars
asteroid belt
JOVIAN
Jupiter, Saturn, [gas giants] , Uranus, Neptune

Question 5

Moon

Answer 5

An object which is found revolving around a planet. A natural satelite of a planet.

Question 6

Asteroid

Answer 6

• small rocky body orbiting the Sun
• there is an asteroid belt located between Mars and Jupiter.

Question 7

Comet

Answer 7

• a dusty snowball which orbits the Sun
• comets from either Kuiper Belt or Oort Cloud

Question 8

Solar System

Answer 8

A Solar System is a group of planets, asteroids, comets and other celestial bodies around a star. Our Solar System is held together, and the planets remain in orbit due to the Sun’s gravity.

Question 9

Galaxies

Answer 9

A galaxy is a large system of stars held together by gravity and separated from similar systems by vast regions of space. Our galaxy is called the Milkyway and our neighbouring galaxie is called Andromeda.