8th Grade Science Quiz On Motion! Trivia

2.

When you say that a race car travels northward at 100 km/h, you are talking about its _________
- Velocity
- Distance
- Acceleration
- Speed
Correct Answer

A. Speed

Explanation

When you say that a race car travels northward at 100 km/h, you are referring to its speed. Speed is a scalar quantity that represents how fast an object is moving, without considering the direction. In this case, the direction is mentioned (northward), but it does not affect the definition of speed. Velocity, on the other hand, is a vector quantity that includes both speed and direction. Distance is a scalar quantity that represents the total length covered by an object, regardless of its direction. Acceleration refers to the rate at which an object's velocity changes over time.

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1
3.

If a train is slowing down, it is accelerating
- True
- False
Correct Answer

A. True

Explanation

When a train is slowing down, it means that its velocity is decreasing. Acceleration is defined as the rate of change of velocity. Since the train is changing its velocity, even if it is decreasing, it is still undergoing acceleration. Therefore, the statement "if a train is slowing down, it is accelerating" is true.

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4.

What is the distance a measure of?
- Width
- Length
- Hieght
- Area
Correct Answer

A. Length

Explanation

Distance is a measure of length. It refers to the amount of space between two points or objects. Length is a fundamental concept in geometry and is commonly used to describe the size or extent of an object in one dimension. In terms of physical quantities, distance is often measured using units such as meters or kilometers.

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5.

What unit is the distance measured in?
- Meters
- Grams
- Inches
- Quarts
Correct Answer

A. Meters

Explanation

The distance is typically measured in meters. Meters are a unit of length in the metric system and are commonly used to measure distances. They are a standard unit of measurement in most scientific and engineering fields.

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6.

Speed in a given direction is...

Correct Answer
velocity

Explanation
Speed in a given direction is referred to as velocity. Velocity is a vector quantity that includes both the magnitude (speed) and the direction of an object's motion. It describes how fast an object is moving and in which direction it is moving. Therefore, velocity is the appropriate term to describe speed in a given direction.

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7.

The basic SI unit of length is the...

Correct Answer
meter

Explanation
The basic SI unit of length is the meter. The meter is defined as the distance traveled by light in a vacuum in 1/299,792,458 of a second. It is widely used in scientific and everyday measurements around the world.

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8.

Scientists around the world use the ________, a system of measurements based on the number ten.

Correct Answer
ISU

8th Grade Science Quiz On Motion! Trivia

_________ occurs when the velocity of an object changes.

Quiz Preview

When you say that a race car travels northward at 100 km/h, you are talking about its _________

If a train is slowing down, it is accelerating

What is the distance a measure of?

What unit is the distance measured in?

Speed in a given direction is...

The basic SI unit of length is the...

Scientists around the world use the ________, a system of measurements based on the number ten.