6.4 WJEC Space

What is the order of the planets in our solar system?

• Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune

• Venus, Earth, Mars, Mercury, Jupiter, Saturn, Uranus, Neptune

• Earth, Mars, Mercury, Venus, Jupiter, Saturn, Uranus, Neptune

• Mars, Mercury, Venus, Earth, Jupiter, Saturn, Uranus, Neptune

Which planets are considered gaseous giants?

• Jupiter and Saturn

• Mars and Venus

• Earth and Mercury

• Neptune and Pluto

What is the mean distance from the Sun to the Earth called?

• Astronomical Unit (A.U.)

• Light Year (l-y)

• Kilometre

• Parsec

What is the main component of the asteroid belt?

• Rocky asteroids and dwarf planets

• Gaseous planets

• Comets

• Moons

What is the term for the distance that light travels in one year?

• Light Year (l-y)

• Astronomical Unit (A.U.)

• Kilometre

• Parsec

What is a supernova?

• An explosion of a star

• A new star formation

• A type of galaxy

• A small planet

What causes the matter in a cloud of gas and dust to form the solar system?

• Magnetic forces

• Gravitational forces

• Electrical forces

• Nuclear forces

What is the role of the Hertzsprung-Russell (H-R) diagram in astronomy?

• It predicts weather patterns.

• It displays the properties of stars.

• It maps the surface of planets.

• It measures the distance to galaxies.

What term is not required when discussing the origin of the solar system?

• Nebula

• Galaxy

• Star

• Planet

What is the significance of the H-R diagram in understanding stars?

• It predicts the weather on planets.

• It shows the evolutionary path of a star.

• It measures the age of the universe.

• It calculates the speed of light.