Rhyolite Characteristics and Properties

Rhyolite Characteristics and Properties

Assessment

Interactive Video

Science

6th - 8th Grade

Hard

Created by

Olivia Brooks

FREE Resource

This video from MooMooMath and Science explores the properties of the igneous rock rhyolite. Rhyolite is light in color, classified as felsic, and contains over 70% silica. It is an extrusive rock formed from rapid cooling lava, resulting in small, often invisible crystals. Rhyolite is produced by violent volcanic eruptions and has a density between 2.4 and 2.6 grams per cubic centimeter. Its texture is fine-grained and aphanitic, meaning the crystals are not visible to the naked eye. The video concludes with a summary of these properties.

Read more

8 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What type of rock is rhyolite classified as?

Organic

Igneous

Metamorphic

Sedimentary

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is rhyolite considered a felsic rock?

It contains high amounts of iron

It is formed deep within the Earth

It is dark in color

It contains over 70% silica

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does the rapid cooling of lava affect the crystal size in rhyolite?

It causes crystals to dissolve

It has no effect on crystal size

It results in small crystals

It results in large crystals

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the typical density range of rhyolite?

1.0 to 1.5 grams per cubic centimeter

4.0 to 4.5 grams per cubic centimeter

2.4 to 2.6 grams per cubic centimeter

3.0 to 3.5 grams per cubic centimeter

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the term 'aphanitic' indicate about rhyolite's texture?

Crystals are small and not visible

The rock is porous

Crystals are large and visible

The rock is layered

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What type of volcanic eruptions produce rhyolite?

Violent eruptions

Eruptions with no lava

Gentle eruptions

Underwater eruptions

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to extrusive rocks when they make contact with the atmosphere?

They melt

They cool slowly

They expand

They cool quickly

8.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is NOT a characteristic of rhyolite?

Felsic

Aphanitic

Extrusive

Coarse-grained