What is a galaxy?

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

• A galaxy is a huge collection of water, plants, and billions of planets and their solar systems, all held together by love.

• A galaxy is a huge collection of cities and billions of stars and their solar systems, all held together by tape.

Write the name of our galaxy?

When did the big bang happen?

• 13.7 billions ago

• 1 year ago

• 100 millions ago

• 10 billions years ago

What is the Milky Way?

• A planet that is known for its rings.

• The galaxy that contains our solar system.

• A type of star that is very bright and can be seen from Earth.

what happened after the big bang?

• After the big bang the universe quickly began get smaller.

• After the big bang the universe quickly began toheat up and expanding.

• After the big bang the universe quickly began cooling and expanding.

Some galaxies are spiral-shaped like ours. They have curved arms that make it look like a _________.

What is the only planet that has liquid water on its surface?

• Mars

• Jupiter

• Earth

• Venus

There are five layers: they are ...

• Solid, liquid, gas and plasma.

• crust, the upper mantle, the mantle, the outer core, and the inner core.

• Rivers, lakes, aceans, montains and streams.

What layer of the earth is decribed:

Is the top layer that we live on. It looks different in different places, some areas have mountains, oceans, lakes and hills, others don’t.

• Inner core

• Mantle

• Crust

• Outer core

Which planet is known as the Red Planet?

• Saturn

• Mercury

• Mars

• Earth