Earth Materials Review

Rocks are made of 

• many different minerals
• many different rocks
• tiny pieces
• pieces of the same mineral

Minerals can be broken down into different things.

• True
• False. Minerals can NOT be broken apart.

The acid tests helps to identify

• calcite
• quartz
• salt
• fossils

A rock with calcite in it will _____ during an acid (vinegar) test.

• fizz and bubble
• change color
• release heat
• make noise

A scratch test identifies how _____ a mineral is.

• hard
• shiny
• colorful
• heavy

Select the choice that has the right order from softest to hardest.

• fingernail, paper clip, penny
• penny, fingernail, paper clip
• fingernail, penny, paper clip
• paper clip, penny, finger nail

If a mineral is scratched by a fingernail it can also be scratched by _______

• nothing else
• just a penny
• just a paper clip
• a penny and a paper clip

If a sample can't be scratched by a paper clip then _______

• a fingernail and a penny won't scratch it
• a penny will scratch it, but a finger nail won't scratch it.
• a fingernail could scratch it, but a penny won't

A true scratch ______

• will leave a mark and can't be wiped off
• will leave a mark and can be wiped off

Salt crystals look like _____

• x's with squares on them
• squares with an x on them
• squares 
• x