Astronomy 6 Unit 1 Test

During this time, after the Big Bang, the rapid cooling of the cosmos permits quarks to clump into protons and neutrons.

• 1x10^-43 seconds

• 1x10^-6 seconds

• 3 minutes

• 300,000 years

During this time, after the Big Bang, the electrons combined with protons and neutrons to form atoms. These atoms are mostly Hydrogen and Helium.

• 1x10^-43 seconds

• 1x10^-6 seconds

• 3 minutes

• 300,000 years

During this time, after the Big Bang, the cosmos goes through a superfast "inflation" expanding from the size of an atom to that of a grape fruit.

• 1x10^-43 seconds

• 1x10^-6 seconds

• 3 minutes

• 300,000 years

Which of the following types of galaxies does the Milky Way galaxy belong to?

• Active Galax

• Elliptical Galaxy

• Irregular Galaxy

• Spiral Galaxy

True or False: Hydrogen is the most abundant element in the universe.

• True

• False

• Maybe

In about 4.5 billion years from now, these two galaxies are expected to collide with each other. What are these galaxies?

• Andromeda Galaxy and Triangulum Galaxy

• Andromeda Galaxy and Milky Way Galaxy

• Milky Way Galaxy and Triangulum Galaxy

• None of the above

It is a mysterious influence driving the accelerated expansion of the universe.

• Electromagnetic force

• Gravitational force

• Dark energy

• Neutrinos

True or False: Microwaves are electromagnetic waves with a wavelength shorter than light.

• True

• False

• Maybe

True or False: Energy and matter can be transformed back and forth.

• True

• False

• Maybe

How many stars do milky way galaxy have?

• 400 million

• 40 billion

• 400 billion

• 1 trillion