Unit Review Mash-up

What is the 5th planet from the Sun?

• Mars
• Jupiter
• Venus
• Earth

How many planets are in our solar system?

• 7
• 9
• 8
• 10

Which planet has been re-classified as a dwarf planet?

• Mars
• Mercury
• Neptune
• Pluto

What is Pitch?

• How loud or soft a sound is
• muscle that holds vocal cords
• movement back and forth
• how high or low a sound is

The rate in which sound waves occur is?

• vibration

• echo

• frequency

• pitch

Sound travels fastest through...

• gas
• liquid
• solids/metals
• space

Why can't we hear sound in space?

• can't take our helmet off to hear
• Space has no mass / no gas/ solids/ liquids
• because it's dark
• Don't know, I've never been to space

A sound that bounces off a surface is called an ________.

• loud sound
• echo
• repeat
• quiet sound

Sound is a form of? 

• energy
• pitch
• volume

Some bacteria live in the stomach of a cow. The bacteria helps the cow break down and digest the plant food that the cow eats. The bacteria gets a meal. This is an example of

• Commensalism

• parasitism

• Mutualism