Types of Rocks: Igneous, Sedimentary, Metamorphic

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What type of rock is formed when melted rock from inside the Earth cools and hardens?

Volcanic rock

Metamorphic rock

Sedimentary rock

Igneous rock (correct)

Which mineral is described as the 'softest mineral' and used to make talcum powder?

Quartz

Talc (correct)

Feldspar

Zincite

Which of the following is NOT a common mineral found in the Earth's crust?

Titanium (correct)

Pyroxenes

Feldspars

Olivine

What is the main component used to make aluminum?

Bauxite Signup and view all the answers

Which type of rock is formed when other rocks are changed by heat and pressure?

Metamorphic rock Signup and view all the answers

What determines whether a rock is classified as igneous, sedimentary, or metamorphic?

All of the above factors contribute to rock classification Signup and view all the answers

Which type of rock is formed from layers of sediment deposited and hardened over time?

Sedimentary rock Signup and view all the answers

What causes existing rocks to transform into metamorphic rocks?

Being heated and squeezed under intense pressure Signup and view all the answers

Which best describes the texture of an igneous rock that cooled rapidly?

Glassy and smooth with no visible grains Signup and view all the answers

What gradual processes can break down and erode rocks over time?

Both wind and water erosion Signup and view all the answers

How do scientists use fossils to understand the past environment?

By studying the age of rock layers surrounding the fossil Signup and view all the answers

Which type of rock is formed by the cooling and solidification of magma or lava?

Igneous rock Signup and view all the answers

Why are most fossils formed from living things that had hard parts such as bones, shells, and wood?

Because soft tissues decay rapidly and do not leave a trace Signup and view all the answers

What type of rocks can be classified according to their color, hardness, and texture?

All types of rocks Signup and view all the answers

Why do scientists study fossils found near the South Pole?

To understand the climate history of the region Signup and view all the answers