Front

How old is the Earth?

Back

The Earth is approximately 4.6 billion years old.

Front

What is Darwin's theory of natural selection?

Back

Darwin's theory states that whichever organism is best suited for its environment will be able to survive and reproduce.

Front

Which layer of rock is the youngest?

Back

The youngest layer of rock is layer 7.

Front

According to the law of superposition, where are the oldest fossils found?

Back

The oldest fossils are found near the bottom of the rock layers.

Front

What is an example of uniformitarianism?

Back

Formation of a delta is an example of uniformitarianism.

Front

What is not an example of uniformitarianism?

Back

An asteroid crashing is not an example of uniformitarianism.

Front

Define uniformitarianism.

Back

Uniformitarianism is the principle that the processes occurring today have also occurred in the past.

Front

What does the law of superposition state?

Back

The law of superposition states that in undisturbed rock layers, the oldest layers are at the bottom and the youngest are at the top.

Front

What is the significance of fossils in Earth's history?

Back

Fossils provide evidence of past life and help scientists understand the history of life on Earth.

Front

What is the principle of natural selection?

Back

Natural selection is the process where organisms better adapted to their environment tend to survive and produce more offspring.