L1 Deep Time in Geography

What is the Geological Time Scale?

• A type of rock formation

• A system of chronological dating that relates geological strata (Rock layers) to time.

• A classification system for clouds

• A method for measuring earthquakes

Name one major extinction event in Earth's history.

• Triassic-Jurassic extinction event

• Permian-Triassic extinction event

• Jurassic-Cretaceous extinction event

• Cretaceous-Paleogene extinction event

How are eras and periods classified in the Geological Time Scale?

• Periods are classified based on major astronomical events.

• Based on major geological and biological events, eras are divided into periods, which are further divided into epochs.

• Eras are divided into epochs, which are further divided into periods.

• Eras are classified based on geographical events, while periods are based on biological events.

What is the significance of the Cambrian Explosion?

• The Cambrian Explosion marks the appearance of most major groups of animals and the rapid diversification of life forms around 541 million years ago.

• The Cambrian Explosion led to the extinction of most animal species

• The Cambrian Explosion occurred around 1 billion years ago

• The Cambrian Explosion only affected marine life forms

Which era is known as the 'Age of Reptiles'?

• Paleozoic Era

• Cretaceous Era

• Mesozoic Era

• Jurassic Era

Explain the concept of 'mass extinction'.

• Mass extinction is a planned decrease in biodiversity caused by human intervention.

• Mass extinction is a rapid decrease in biodiversity caused by catastrophic events.

• Mass extinction is a slow increase in biodiversity caused by gradual events.

• Mass extinction is a sudden increase in biodiversity caused by natural selection.

What evidence do scientists use to study past extinction events?

• Weather forecasts, social media trends, astrological predictions

• Cooking recipes, fashion trends, sports scores

• Traffic reports, celebrity gossip, stock market data

• Fossil records, geological data, chemical signatures, and DNA analysis

How do scientists estimate the age of rocks and fossils?

• Stratigraphy analysis

• Radiometric dating

• Carbon dating

• Weathering observation

What role do fossils play in understanding deep time?

• Fossils help in understanding modern ecosystems

• Fossils provide evidence of past life forms and help scientists determine the age of rocks and the Earth.

• Fossils are only found in sedimentary rocks

• Fossils are used for predicting future climate changes

Describe the impact of human activities on current extinction rates.

• Human activities have no impact on extinction rates

• Extinction rates are solely caused by natural factors

• Human activities have led to increased extinction rates through habitat destruction, pollution, climate change, and overexploitation of resources.

• Extinction rates are decreasing due to human activities