Rocks and Minerals

Calcite is the softest mineral.

• True
• False

Quartz is the hardest mineral on this chart.

• True
• False

From the data in the graph, what conclusion can be made?

• Solid 1 took the longest to melt.

• Solid 1 took the least amount of time to melt

• Solid 3 took the most time to melt.

• Solid 3 took longer to melt than solid 2.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS3-1

When a great amount of heat and pressure are added to limestone, what once was a sedimentary rock now becomes a metamorphic rock known as marble.

• True
• False

Rock A has remains of plants and animals. How would you classify that rock?

• Igneous

• Sedimentary

• metamorphic

Tags

NGSS.MS-LS4-1

Rock B has folded layers. How would you most likely classify this rock?

• igneous

• sedimentary

• metamorphic

Rock C is glassy. How would you most likely classify this rock?

• Metamorphic

• igneous

• sedimentary

Students have a rock sample that may contain the mineral magnetite. They know that magnetite makes a dark gray streak. How can the students determine the color of the streak in the rock sample?

• rub the sample on a piece of unglazed clay tile

• use a rock with the known mineral to strike the sample

• use a file to break off a piece of the sample

• scratch the sample with an iron nail

Which conclusion can be drawn from the information in the chart?

• Feldspar can be scratched by amphibole

• Olivine is dull.

• Pyroxene can be scratched by Olivine.

• Feldspar is shiny.

Students observed that a diamond was able to scratch a piece of fluorite. What does this observation best support?

• Diamonds are very valuable.

• Fluorite is softer than diamonds.

• Diamonds have sharp edges.

• Fluorite and diamonds are both minerals