Quiz on Rocks and Minerals

Which of the following is a basic igneous rock?

• Graphite

• Basalt

• Granite

• Rhyolite

Which of these has definite chemical composition?

• Rocks

• Fossils

• Minerals

• Coral

What causes the formation of intrusive igneous rocks?

• Rapid cooling on surface

• Lithification of sediments

• Slow cooling below surface

• Heat and pressure

Breccia and sandstone are examples of —

• Organically formed sedimentary rocks

• Mechanically formed sedimentary rocks

• Igneous rocks

• Metamorphic rocks

Which rock is most likely to contain fossils?

• Basalt

• Gabbro

• Sandstone

• Quartzite

Which of the following is NOT true about igneous rocks?

• They are primary rocks

• They are formed from cooling of magma

• They contain fossils

• They can be intrusive or extrusive

Chemically formed sedimentary rocks are common in:

• Coastal plains

• Forest areas

• Hot, arid lands

• Cold deserts

Which rock is formed when limestone undergoes change due to heat and pressure?

• Gneiss

• Slate

• Quartzite

• Marble

Which rock has light colour and low density due to high silica content?

• Basalt

• Granite

• Graphite

• Limestone

Which of the following is a use of non-economic importance of rocks?

• Construction

• Mineral source

• Fuel supply

• Soil formation for plants