Precambrian test

What event occurred during the Precambrian?

• Formation of modern continents.

• Extinction of dinosaurs.

• Emergence of mammals.

• First life on Earth.

Which of the following statements about the Precambrian is true?

• It was the shortest era in Earth's history.

• It lasted approximately 600 million years.

• Earth was covered in ice during this time.

• It was the era when the first humans appeared.

Which form of life originated during the Precambrian?

• Dinosaurs.

• Flowering plants.

• Prokaryotes.

• Birds.

What significant geological event occurred at the end of the Precambrian?

• Formation of oceans.

• Global glaciation.

• Mass extinction.

• Formation of the Appalachian Mountains.

Which of the following gases was abundant in the atmosphere during the Precambrian?

• Oxygen.

• Carbon dioxide.

• Methane.

• Nitrogen.

Which event characterizes the beginning of the Precambrian?

• Emergence of the first mammals.

• Formation of the Moon.

• Development of photosynthesis.

• Extinction of trilobites.

What type of rocks are common in the geological record of the Precambrian?

• Sedimentary rocks.

• Metamorphic rocks.

• Igneous rocks.

• Volcanic rocks.