Because it's so big and we can't study things far away.
1 of 35
Where does star's energy come from?
The fusion of Hydrogen Nuclei.
2 of 35
Will a further away galaxy move faster or slower away from us?
Faster.
3 of 35
How old is the universe?
13.7 billion years.
4 of 35
How old is the Sun?
4.6 billion years.
5 of 35
How do we know the universe is expanding?
We can see redshift light from distant stars.
6 of 35
What are asteroids?
Lumps of rock that orbit stars very quickly.
7 of 35
What is a Binary asteroid?
A big asteroid with small asteroids orbiting it.
8 of 35
What is a star?
A large clump of hot Helium and Hydrogen, with a few other hot gases.
9 of 35
What are comets?
The leftovers of stars and planets.
10 of 35
What makes planets spherical?
The strength of their own gravitational pull.
11 of 35
What is a moon?
A natural satellite orbiting a planet.
12 of 35
Why is it often hard to see the stars in cities and towns?
Light pollution.
13 of 35
How old is the Earth?
4.5 billion years.
14 of 35
What is the diameter of the Sun?
1.3-1.4 million km.
15 of 35
What is the Earth's diameter?
12700 km.
16 of 35
Name two ways scientists can use to work out how far away stars are and briefly explain them?
The brightness of a star can be indicated by it's colour spectrum, and this helps us work out how far away it is. The second method is worked out using the difference in the Earth's orbit and parallax angles.
17 of 35
Name three rules that scientists use to help them work out the age of rocks?
Cross cutting rocks are often younger, deeper rocks are normally older, and fossils are time markers.
18 of 35
What did James Hutton discover?
The rock cycle.
19 of 35
Name the three type of rock and an example of them.
Metamorphic rocks (Slate and Marble), Igneous rocks (Basalt and Granite) and Sedimentary (Chalk and Limestone).
20 of 35
Speed = ?
Distance / Time.
21 of 35
What is the diameter of the Milky Way?
100,000 Light Years.
22 of 35
Name the nearest star and how far away it is from the Sun?
Proxima Centauri, 4.2 light years.
23 of 35
Where is the asteroid belt?
Between Mars and Jupiter.
24 of 35
Name the nearest galaxy and how far away it is from the Milky Way?
Andromeda, 2.5 million light years.
25 of 35
How many moons are there in our solar system?
166 moons.
26 of 35
What is the speed of light?
300,000 km/s.
27 of 35
What is the Earth's orbit diameter?
300,000,000 km
28 of 35
Where were elements heavier that helium made?
The stars.
29 of 35
What is a comet's tail made of?
Melting ice.
30 of 35
What is the moon's diameter?
3,500 km.
31 of 35
What are the three parts to the Earth's structure?
The core, mantle and crust.
32 of 35
Why is it very easy for mistakes to be made about the distance to stars?
Because parallax angles are very very small.
33 of 35
What is the diameter of the Solar System including and excluding the kuiper belt and oort clouds?
Including = 100,000 AU - Excluding (up to pluto) = 79 AU.
34 of 35
What is an AU?
Astronomical Unit, distance from Earth to Sun, 150 million km.
35 of 35
Other cards in this set
Card 2
Front
Where does star's energy come from?
Back
The fusion of Hydrogen Nuclei.
Card 3
Front
Will a further away galaxy move faster or slower away from us?
Comments
No comments have yet been made