Rock Types and Their Characteristics

The video 'Rocks!' introduces viewers to different types of rocks, including igneous, sedimentary, and metamorphic. It explains how rocks are classified based on their formation and properties such as hardness, cleavage, luster, color, streak, and texture. The video details the formation processes of igneous rocks (intrusive and extrusive), sedimentary rocks (formed by weathering and erosion), and metamorphic rocks (altered by heat and pressure). It also highlights the uses of these rocks in construction and art, encouraging viewers to start their own rock collections.

What are the three main types of rocks?

• Igneous, Metamorphic, Fossil

• Igneous, Sedimentary, Fossil

• Sedimentary, Metamorphic, Fossil

• Igneous, Sedimentary, Metamorphic

Which type of igneous rock forms when magma cools inside the Earth's surface?

• Volcanic

• Intrusive

• Extrusive

• Sedimentary

What is the texture of granite?

• Layered

• Glassy

• Fine-grained

• Coarse-grained

Which igneous rock is light enough to float in water?

• Pumice

• Obsidian

• Granite

• Basalt

What are sedimentary rocks primarily formed from?

• Sediments

• Magma

• Minerals

• Lava

Which sedimentary rock is made of coarse, rounded pebbles cemented together?

• Breccia

• Conglomerate

• Sandstone

• Shale

What is limestone primarily made of?

• Plant fragments

• Calcite shell fragments

• Clay

• Sand

What causes metamorphic rocks to form?

• Cooling of magma

• Sediment compaction

• Heat and pressure

• Weathering and erosion

Which metamorphic rock is formed from limestone?

• Slate

• Gneiss

• Quartzite

• Marble

What should you do before picking up rocks from the ground?

• Use a magnifying glass

• Wash the rocks

• Wear gloves

• Check with an adult