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Year 8 Assessments > Y8 Science | The Universe > Flashcards

Y8 Science | The Universe Flashcards

1
Q

What objects can we see in the night sky?

A

satellites, planets, stars

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2
Q

What is a satellite?

A

an object that orbits the Earth

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3
Q

What is the Earth’s natural satellite?

A

The Moon

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4
Q

Define “artificial satellite”

A

Manmade objects that orbit Earth; used for communications

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5
Q

Why does the Moon appear bright?

A

Light from the Sun reflects off it

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6
Q

Define “galaxy”

A

A collection of stars

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7
Q

Name the galaxy that we are in

A

The Milky Way

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8
Q

Define “star”

A

An object in space that gives out light and heat energy

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9
Q

Define “light year”

A

The distance travelled by light in one year

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10
Q

List the following from smallest to biggest: solar systems, moons, stars, planets, universe, galaxies, universe

A

moon, planet, star, solar system, galaxy, universe

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11
Q

Name the main components of the Solar System

A

Sun, planets, moons, asteroid belt, dwarf planets

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12
Q

Recall the order of the 8 planets in the Solar System

A

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

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13
Q

What separates the inner and outer planets of the Solar System?

A

an asteroid belt

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14
Q

What are the inner planets of the solar system like?

A

rocky

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15
Q

What are the outer planets of the solar system like?

A

they are gas giants

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16
Q

Name the force that keeps planets and moons in orbit around larger objects

A

Gravity

17
Q

Name four methods used to investigate space

A

Earth-based telescopes, space-based telescopes, unmanned probes, manned missions

18
Q

What do we mean by Earth’s ‘axis’?

A

the ‘line’ it spins around

19
Q

What is a year?

A

The time taken for a planet to orbit the Sun

20
Q

What causes day and night?

A

The Earth spinning on its axis

21
Q

What causes the seasons?

A

The tilt of the Earth - the suns rays spread out differently

22
Q

What is the name for the changing shapes of the moon?

A

The phases of the Moon

23
Q

How long does it take for the Moon to orbit Earth?

A

28 days (approx)

24
Q

Why do we only ever see one side of the Moon from Earth?

A

The Moon and Earth’s rotations are in synch so we only see one side

25
Q

What was the geocentric model of the universe?

A

The idea that Earth was at the centre and everything moved around it?

26
Q

What is the heliocentric model?

A

The idea that the planets and Earth orbit the Sun (‘helios’)

27
Q

What evidence was there for the heliocentric model?

A

moons orbiting Jupiter, Venus having phases

Year 8 Assessments (18 decks)

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