8th Grade LEAP 2025 Science Review

Front

What is an adaptation?

Back

An adaptation is a characteristic or trait that helps an organism survive and reproduce in its environment.

Front

What are homologous structures?

Back

Homologous structures are body parts in different species that have similar structures but may serve different functions, indicating a common ancestry.

Front

What is an eon in the Geologic Time Scale?

Back

An eon is the largest division of geological time, encompassing billions of years.

Front

What is erosion?

Back

Erosion is the process by which soil and rock are removed from the Earth's surface by natural processes such as wind or water.

Front

What is the movement of tectonic plates?

Back

The movement of tectonic plates refers to the shifting of the Earth's lithosphere, which can cause earthquakes, volcanic eruptions, and the formation of mountains.

Front

What is the significance of well-rounded peaks in mountains?

Back

Well-rounded peaks indicate that the mountains have been shaped by erosion over a long period of time.

Front

What is a vestigial structure?

Back

A vestigial structure is a body part that has lost its original function through evolution, such as the human appendix.

Front

What is the role of natural selection in evolution?

Back

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

Front

What is the fossil record?

Back

The fossil record is the history of life on Earth as documented by fossils, providing evidence of past organisms and their evolution.

Front

What is an acquired trait?

Back

An acquired trait is a characteristic that an organism develops during its lifetime, which is not inherited genetically.