Geological Time and Earth Materials

Front

What is the Law of Superposition?

Back

The Law of Superposition states that in undisturbed sedimentary rock layers, the oldest layers are at the bottom and the youngest layers are at the top.

Front

What is the rock cycle?

Back

The rock cycle is a continuous process where rocks can change from one type to another (igneous, sedimentary, metamorphic) through various geological processes.

Front

What types of rocks can be the parent rock of a metamorphic rock?

Back

Metamorphic rocks can have sedimentary, igneous, or other metamorphic rocks as their parent rocks.

Front

Which mineral can scratch a glass plate but not a steel nail?

Back

Orthoclase is a mineral that can scratch a glass plate but not a steel nail.

Front

What is the largest division of geological time?

Back

The largest division of geological time is an Eon.

Front

Define sedimentary rock.

Back

Sedimentary rock is formed from the accumulation and compaction of mineral and organic particles, often in layers.

Front

What is an igneous rock?

Back

Igneous rock is formed from the solidification of molten rock (magma or lava).

Front

Explain the process of metamorphism.

Back

Metamorphism is the process by which existing rocks are transformed into metamorphic rocks through heat, pressure, and chemically active fluids.

Front

What is the difference between relative dating and absolute dating?

Back

Relative dating determines the age of rocks and fossils in relation to one another, while absolute dating provides a specific age using methods like radiometric dating.

Front

What is an example of a sedimentary rock?

Back

An example of a sedimentary rock is sandstone, which is formed from sand particles.