Types of Rocks and Weathering Processes

The video explains the dynamic rock cycle, detailing how rocks transform through weathering, erosion, and tectonic activity. It covers the formation of igneous, sedimentary, and metamorphic rocks, and highlights the role of minerals and weathering processes. Special rock types like chalk, limestone, and coal are also discussed, emphasizing their origins and transformations.

What is the main difference between sandstone and granite in terms of their grain structure?

• Sandstone has interlocking grains, while granite has rounded grains.

• Granite has interlocking grains, while sandstone has rounded grains.

• Both have interlocking grains.

• Both have rounded grains.

Why does sandstone produce bubbles and gain weight when placed in water?

• It reacts chemically with water.

• It absorbs water due to its dense structure.

• It has air spaces between grains that release air when submerged.

• It has a higher density than water.

What is the term for rocks that are formed by the solidification of molten rock?

• Fossil rocks

• Metamorphic rocks

• Sedimentary rocks

• Igneous rocks

What type of weathering involves the expansion and contraction of rocks due to temperature changes?

• Biological weathering

• Erosional weathering

• Chemical weathering

• Mechanical weathering

Which process is responsible for transporting weathered rock to the sea?

• Volcanism

• Sedimentation

• Metamorphism

• Erosion

Which mineral in granite is responsible for forming sand after weathering?

• Calcite

• Mica

• Quartz

• Feldspar

What is the process called when rocks are heated and compressed to form metamorphic rocks?

• Erosion

• Weathering

• Metamorphism

• Sedimentation

Which type of rock is formed from the shells of dead sea creatures?

• Igneous rock

• Sedimentary rock

• Volcanic rock

• Metamorphic rock

What is the primary component of limestone?

• Iron oxide

• Calcium carbonate

• Silicon dioxide

• Magnesium sulfate

How does peat transform into coal?

• Through biological decomposition

• Under heat and pressure over time

• By being buried under layers of sediment

• Through chemical reactions with water