STMS 2ndQ Practice Test

Front

What is the Law of Superposition?

Back

In geology, 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 are fossils?

Back

Fossils are the preserved remains or traces of ancient organisms, often found in sedimentary rock.

Front

What does it mean if a fossil is found in a lower rock layer?

Back

It generally indicates that the organism existed earlier in geological time compared to organisms found in higher layers.

Front

What is a mass extinction?

Back

A mass extinction is a widespread and rapid decrease in the biodiversity on Earth, often caused by catastrophic events.

Front

What role do greenhouse gases play in climate change?

Back

Greenhouse gases trap heat in the atmosphere, leading to an increase in global temperatures.

Front

What is sedimentary rock?

Back

Sedimentary rock is formed by the accumulation and compaction of mineral and organic particles, often containing fossils.

Front

What can the presence of trilobite fossils indicate about past environments?

Back

The presence of trilobite fossils suggests that the area was once underwater, as trilobites were marine organisms.

Front

What is the significance of fossil layers in understanding Earth's history?

Back

Fossil layers help scientists determine the relative ages of organisms and the environmental conditions of the past.

Front

What is the Permian Period?

Back

The Permian Period is a geological time frame that lasted from about 299 to 252 million years ago, known for the largest mass extinction event.

Front

How do volcanic eruptions affect the atmosphere?

Back

Volcanic eruptions can release large amounts of ash and gases, including greenhouse gases, which can alter climate and atmospheric conditions.