Solar system test review

Scientists know because they were watching our solar system from

• Scientists don't know they are just guessing

• we can see different stages of solar system development when we look around the universe

• Smaller solar systems form faster, so we have seen those form

• Scientists know because they were watching our solar system from

What is the first step in solar system formation?

• Cloud of gas and dust collapses

• Cloud of glass flattens and spins

• Most of the stuff gets pulled into the center

• The sun gets hot enough to start fusion

What is the second step in solar system formation?

• Gravity pulls a cloud of gas and dust toward the center

• the cloud flattens and spins

• Most of the stuff gets pulled into the center

• The sun becomes hot enough to start fusion

Can planets orbit over the top and bottom of the sun?

• Yes, but they don't because of the way the solar system formed

• Yes, planets go over the top and bottom of the sun

• No, planets can't go over the top and bottom of the sun

• Yes, planets can go over the top and bottom of the sun but they don't like to

What is the third step in solar system formation?

• A cloud of gas and dust collapses on itself

• the cloud flattens and spins

• most of the stuff gets pulled into the center

• The sun gets hot enough to start fusion

What is the last step in solar system formation?

• a cloud of gas and dust collapses on itself

• the cloud flattens and spins

• most of the stuff gets pulled into the middle

• the sun gets hot enough to start fusion

Mercury is the fastest moving planet.  It moves so fast because __________.

• it is closest to the sun

• it is the smallest planet

• it was the first planet formed

• it doesn't have an atmosphere

Mercury's liquid core is shrinking.  How does that affect the surface?

• It makes craters

• It makes it very hot

• It doesn't affect the surface

• It forms cliffs and mountains when the crust buckles

How large is Venus?

• Smaller than Earth

• Larger than Earth

• same size as Earth

• Much larger than Earth

Venus has a very thick atmosphere.  How does it affect the planet?

• It holds heat from the sun

• It makes it very windy

• It causes a lot of rain

• it causes volcanoes