California Science Test (CAST) 8th Grade Practice Exam

What is the term for how fast an object is moving, defined as distance traveled divided by the time taken?

Velocity Speed Acceleration Momentum

Correct Answer:

Speed

Explanation:

Speed is how fast an object moves, calculated as distance traveled divided by the time required. This is the exact way to describe how quickly something covers a distance, giving you the average rate of motion. The other terms describe different ideas: velocity adds a direction (how fast and which way), acceleration is the rate at which speed or velocity changes over time, and momentum combines mass with velocity. For example, traveling 100 meters in 5 seconds gives an average speed of 20 meters per second.

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