7th Grade Semester Test Review

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances, often accompanied by energy changes, color changes, or the production of gas.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition, such as changes in state, shape, or size.

Front

What is the formula for calculating average speed?

Back

AS = total distance / total time

Front

What does a graph showing constant speed look like?

Back

A graph showing constant speed is a straight line with a positive slope, indicating that distance increases at a steady rate over time.

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Back

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Front

What is velocity?

Back

Velocity is defined as speed in a specific direction, indicating how fast an object is moving and where it is going.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity that refers to how fast an object is moving, while velocity is a vector quantity that includes both speed and direction.

Front

What is the relationship between distance, speed, and time?

Back

Distance = Speed × Time; this formula shows how these three quantities are related.

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object, indicating how quickly an object is speeding up or slowing down.

Front

What is the formula for calculating acceleration?

Back

Acceleration = (Final Velocity - Initial Velocity) / Time