3.1 Understanding the Rock Cycle

Front

What is the process called when sediment is compacted and cemented to form sedimentary rock?

Back

Lithification

Answer explanation

The process of lithification involves the compaction and cementation of sediment, transforming it into sedimentary rock. This distinguishes it from metamorphism, erosion, and weathering, which are different geological processes.

Front

During a geology field trip, Abigail and Jackson discovered a rock that was formed from the cooling and solidification of magma or lava. Which type of rock did they find?

Back

Igneous

Answer explanation

Igneous rocks are formed from the cooling and solidification of magma or lava. Sedimentary rocks form from sediment, and metamorphic rocks arise from existing rocks under heat and pressure. Fossiliferous is a type of sedimentary rock.

Front

What is the primary agent of metamorphism in rocks?

Back

Pressure

Answer explanation

The primary agent of metamorphism is pressure, which alters the mineral composition and texture of rocks. Unlike water, wind, or ice, pressure directly influences the physical and chemical properties of minerals during metamorphic processes.

Front

During a field trip, Aiden noticed that some rocks had broken down into smaller pieces over time. Which process is responsible for this? Options: Melting, Erosion, Weathering, Deposition

Back

Weathering

Answer explanation

Weathering is the process that breaks down rocks into smaller pieces through physical, chemical, or biological means. Erosion involves the movement of these particles, while melting and deposition are different processes.

Front

What type of rock can be transformed into metamorphic rock through heat and pressure?

Back

Any type of rock

Answer explanation

Any type of rock, including igneous, sedimentary, and existing metamorphic rock, can be transformed into metamorphic rock through the processes of heat and pressure. Therefore, the correct answer is 'Any type of rock'.

Front

Which process involves the movement of sediment from one location to another?

Back

Erosion

Answer explanation

Erosion is the process that involves the movement of sediment from one location to another, often caused by wind, water, or ice. It differs from deposition, which is the laying down of sediment.

Front

What is the term for molten rock beneath the Earth's surface?

Back

Magma

Answer explanation

The term for molten rock beneath the Earth's surface is magma. When it erupts onto the surface, it is called lava. Basalt and granite are types of rock formed from cooled magma and lava, respectively.

Front

Which type of rock is most likely to contain fossils? Options: Igneous, Metamorphic, Sedimentary, Volcanic

Back

Sedimentary

Answer explanation

Sedimentary rocks are formed from the accumulation of sediments, which can include organic materials. This makes them the most likely type of rock to contain fossils, as they preserve the remains of ancient organisms.

Front

What is the process by which rocks are broken down by chemical reactions?

Back

Chemical weathering

Answer explanation

Chemical weathering is the process where rocks are broken down through chemical reactions, altering their mineral composition. This distinguishes it from physical, biological, and mechanical weathering, which involve different processes.

Front

What is the main difference between magma and lava?

Back

Magma is found underground, lava is found on the surface

Answer explanation

The main difference is that magma is found underground, while lava is the term used for magma that has erupted onto the surface. This distinction is crucial in understanding volcanic activity.