Dark Matter and Dark Energy

Dark matter is a theoretical substance. What does this mean?

• Scientists have simply guessed that it exists

• There is evidence for its existence, but it hasn't been proven

• Scientists are certain that it exists

• Scientists are split 50/50 over whether it exists or not

Who found out that galaxies are moving away from us and the universe is expanding?

• Arno Penzias

• Edwin Hubble

• Henrietta Swan Leavitt

• Robert Wilson

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Most of the universe is made of

• visible matter

• Invisible matter

• dark energy

• dark energy and dark matter

What kind of matter makes up you and me and all we can see?

• Special Matter

• Normal Matter

• Dark Matter

• Light Matter

How did scientists realize that dark matter should exist?

• Normal matter wouldn't have enough gravity to form galaxies.
• By looking at the sky with a superhigh resolution telescope
  
• They got messages from creatures living in dark matter.
• By crashing a spacecraft into a large region of dark matter.

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Dark matter is:

• invisible

• made of atoms

• listed on the Periodic Table

• shiny, like stars

Only 5% oh the universe is regular matter

• True

• False

• Mabye

• Who knows

The Milky Way is a___.

• galaxy

• star

• planet

• moon

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NGSS.MS-ESS1-2

About how long ago do scientists believe the universe began?

• 13-14 billion years ago
• 13-14 million years ago
• 12-13 billion years ago
• 12-13 million years ago

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NGSS.HS-ESS1-2

What were the original two elements in our universe?

• Lithium and Carbon
• Hydrogen and Neon
• Helium and Chlorine
• Hydrogen and Helium