Astrophysics Review

Which of the following answers best describes the orbits of planets, moons and comets?

• A

• B

• C

• D

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Which of the following gives the sizes of astronomical objects in order of increasing size?

• Solar system, universe, galaxy

• Universe, galaxy, solar system

• Solar system, galaxy, universe

• Galaxy, solar system, universe

Tags

NGSS.MS-ESS1-3

Approximately how many stars are in a typical galaxy?

• Hundreds of stars

• Thousands of stars

• Millions of stars

• Billions of stars

What is the name of our own galaxy containing the Sun?

• The Andromeda galaxy

• The Milky Way galaxy

• The Orion galaxy

• The Hubble galaxy

Tags

NGSS.MS-ESS1-2

Which of these statements is correct?

• Planets orbit moons, planets orbit stars

• Moons orbit planets, stars orbit planets

• Moons orbit stars, stars orbit planets

• Moons orbit planets, planets orbit stars

Tags

NGSS.MS-ESS1-2

NGSS.MS-ESS1-1

The formula above can be used to calculate the orbital velocity v of any object. It can be re-arranged to find the radius of the orbit.

Which of the following has been correctly re-arranged?

• 
• 
• 
• 

Tags

NGSS.HS-ESS1-4

The Earth orbits the Sun in 1 year, which is 3.2 x 10⁷ seconds. The radius of the Earth's orbit is about 150 million kilometres. What is the orbital velocity of the Earth?

• 4.6 x 10³ m/s

• 29 m/s

• 4.6 m/s

• 2.9 x 10⁴ m/s

Tags

NGSS.MS-ESS1-2

NGSS.MS-ESS1-1

NGSS.MS-PS2-4

Astronomers make detailed observations of individual stars. Which measurement will lead to finding the surface temperature of the star?

• The colour of the star.

• The brightness of the star.

• The observed size of the star.

• The motion of the star.

Stars that are stable and producing energy from fusion for millions (or billions) of years are called...

• Red giant stars.

• Brown dwarf stars.

• Variable stars.

• Main sequence stars.

What is a 'nebula'?

• A large cloud of dust and gas.

• A small dwarf star.

• A type of supernova.

• A type of galaxy.