8th Grade LEAP 2025 Science Review

Front

What is the basis for defining units of geologic time?

Back

Units of geologic time are defined based on major changes in life forms at certain times.

Front

What is a key indicator that a chemical reaction has occurred?

Back

A change in color is a strong clue that a chemical reaction has taken place.

Front

What processes can lead to the formation of high mountains with rounded peaks?

Back

The movement of tectonic plates and erosion can result in the formation of high mountains with well-rounded peaks.

Front

What is heat transfer by light called?

Back

Heat transfer by light is called radiation.

Front

What is the term for heat transfer that occurs through direct contact?

Back

Heat that is transferred because of touching is called conduction.

Front

What is the definition of convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases).

Front

What is the difference between conduction and convection?

Back

Conduction is heat transfer through direct contact, while convection involves the movement of fluids.

Front

What is an example of radiation in everyday life?

Back

An example of radiation is feeling the warmth of the sun on your skin.

Front

What role do tectonic plates play in Earth's geology?

Back

Tectonic plates are responsible for the movement of the Earth's crust, leading to earthquakes, mountain formation, and volcanic activity.

Front

What is erosion and how does it affect landscapes?

Back

Erosion is the process of wearing away rocks and soil, which shapes landscapes and can lead to the formation of valleys and mountains.