Classifying Rocks

Which of the following processes would produce metamorphic rocks?

• Gradual erosion

• Slow cooling

• Rapid heating

• Extreme pressure

Tags

NGSS.MS-ESS2-2

Which of the following best describes how igneous rocks were formed?

• Rock changed by heat and pressure

• Melted rock that cools

• Tiny pieces of rock cementing together

• Layered rock splitting apart.

Jarrel went on an archaeological dig one weekend with his grandfather. He found a fossil inside sedimentary rock.

What is sedimentary rock made from?

• Metal ores that are exposed to moisture

• Molten lava that has cooled

• Pieces of other rocks and fossilized organisms

• Large boulders close together

Based on their different processes of formation, how many categories of rock are there?

• Two

• Three

• Four

• Five

Igneous rock is made from molten rock. What is molten rock?

• Rock that is molded

• Rock that is moving

• Rock that is mixed

• Rock that is melted

In order for a rock to be classified as igneous, what must have happened during its formation?

• Solid rock changing under pressure

• Liquid rock changing its physical state

• Small rocks becoming cemented together

• Layered rock breaking into smaller pieces

Rocks can be formed during different processes or Earth activities. Which of the following best describes sedimentary rocks?

• Pieces of other rocks and fossilized organisms.

• Rocks made from the melting of other rocks

• Pieces of rock made from the cooling of rocks.

• Rocks formed from heat and pressure

Rocks on Earth are formed from different processes and are classified based on their formation. Metamorphic rock is produced by which of the following processes?

• Earth decay

• Gradual erosion

• Pressure and heat

• Slow cooling

Tags

NGSS.MS-ESS2-2

Sedimentary rocks are one of the major rock types. What best describes how sedimentary rocks can form?

• Melting of rock layers

• Pressure applied to rock fragments

• Smoothing of jagged rocks

• Ice moving heavy rocks

Tags

NGSS.MS-ESS2-2

While playing in a field. Vanessa found a rock. She was not able to identify the specific rock type, but she could identify it as a metamorphic rock. Knowing that the rock is a metamorphic rock, which of the following is the most reasonable conclusion we can draw about this rock?

• It must be made of metal and iron.

• It should contain fossilized organisms.

• It was formed by heat and pressure.

• The rock previously melted completely.