Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Year 8 Ms Lee 2024 Flashcards > Earth & Space > Flashcards

Earth & Space Flashcards

1
Q

What are the 3 layers of the Earth?

A
  • Crust
  • Mantle
  • Core
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the outermost layer of rock which supports all life called?

A

Crust

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Describe the composition of the Earth’s crust?

A

It is composed of solid rock, primarily made up of oxygen, silicon, aluminum and iron.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is magma and where is it found?

A

Magma is molten, or semi-molten material which forms igneous rock. It is found in the upper mantle.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the difference between magma and lava?

A

Magma: molten rock beneath the Earth’s surface.
Lava: magma that has erupted onto Earth’s surface.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

How may layers does Earth’s core have?

A

Two (the inner core and the outer core).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What causes the creation of mountains and eruptions of volcanos on Earth?

A

Tectonic plate movements and interactions e.g. a collision.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are the 4 spheres of the Earth?

A
  • Atmosphere
  • Biosphere
  • Geosphere
  • Hydrosphere
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What creates the Earth’s magnetic field?

A

The movement of the liquid outer core.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How many major tectonic plates account for the continents of the world?

A

7

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is a tectonic plate?

A

A massive irregular shaped slap of solid rock.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Name the supercontinent that existed over 250 million years ago?

A

Pangaea

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the Universe?

A

All of space, matter, energy, time and it’s contents. Including planets, stars, galaxies, and all other forms of matter and energy.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is a galaxy?

A

A huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is the solar system?

A

Consists of the sun and everything bound to it by gravity; planets, moons, asteroids, comets and meteoroids.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

When did our solar system form?

A

About 4.5 billions years ago.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

What is larger, the universe or the solar system?

A

The Universe.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

In which galaxy do we live?

A

The Milky Way Galaxy.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What are the 2 main gases that stars are composed.

A
  • Hydrogen
  • Helium
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

What is the closest star to Earth?

A

Our sun

21
Q

What is the center of our solar system?

A

Our sun

22
Q

What are moons?

A
  • Similar to planets in shape.
  • Orbit a planet rather than the sun.
23
Q

What is the order of the planets, based on their distance from the sun?

A
  • Mercury
  • Venus
  • Earth
  • Mars
  • Jupiter
  • Saturn
  • Uranus
  • Neptune
24
Q

What is a planet?

A

A celestial body that orbits stars.

25
Q

What is the acronym for remembering the planets in our solar system?

A

My Very Easy Method Just Sums Up Naming

26
Q

Which planet is the hottest in our solar system due to the greenhouse effect?

A

Venus

27
Q

Which planet in the only one in our solar system with tectonic plates.

A

Earth

28
Q

What is the 4th planet away from the sun (known as our ‘red neighbour’)

A

Mars

29
Q

How many moons does Jupiter have?

A

Roughly 79 moons

30
Q

Which planet is closest to the sun?

A

Mercury

31
Q

What are asteroids?

A

Made up of metal, rock or both. They are larger than meteoroids.

32
Q

What are comets made of?

A

Small, icy bodies of frozen gases, rocks and cosmic dust.

33
Q

How many moons does Earth have?

A

One

34
Q

What is a meteor?

A

A meteoroid that enters Earth’s atmosphere and heats up due to friction.

35
Q

What gives Saturn its distinctive appearance?

A

Its rings, primarily made of ice and rock particles.

36
Q

Which planet has the Great Red Spot, a giant storm.

A

Jupiter

37
Q

What are the interactions between the sun, earth, and moon?

A
  • The Earth orbits the sun (once every 365 days).
  • The Moon orbits the Earth (once every 28 days).
38
Q

What causes seasons on Earth?

A

The Earth’s rotational axis being tilted (at 23.5 degrees), relative to the sun.

39
Q

What causes the phases we see in the moon?

A

As the moon orbits Earth, we see different fractions of its illuminated half, creating the phases.

40
Q

How long does it take for the Earth to rotate once on its axis?

A

24 hours

41
Q

What causes day and night on Earth?

A

The rotation of Earth on it’s axis.

42
Q

What force keeps the moon in orbit around the Earth?

A

The gravitational pull of the Earth.

43
Q

What is a ‘new moon’?

A

When the moon is between the Earth and the sun, and the side facing Earth is in shadow.

During a new moon, the moon is not visible from Earth.

44
Q

What is a full moon?

A
  • When the Earth is between the moon and the sun, and the side facing Earth is fully lit.
  • A full moon is fully illuminated as seen from Earth (occurs once per month).
45
Q

What is the angle of Earth’s tilt?

A

Approximately 23.5 degrees.

46
Q

What happens to Earth’s seasons if the tilt angle changes?

A

The intensity and distribution of the seasons would be affected.

47
Q

Why don’t we always see a solar or lunar eclipse each month?

A

Because the orbits of the moon and Earth are tilted, relative to each other.

48
Q

What is an eclipse season?

A

A period when the moon’s orbit aligns with the Earth and sun, making eclipses possible.

Year 8 Ms Lee 2024 Flashcards (9 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions