8th Grade Science Quiz On Motion! Trivia
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Questions and Answers
- 1.
_________ occurs when the velocity of an object changes.
- A.
Acceleration
- B.
Velocity
- C.
Speed
- D.
Distance
Correct Answer
A. AccelerationExplanation
Acceleration occurs when the velocity of an object changes. It is a measure of how quickly an object's velocity is changing over time. When an object speeds up, slows down, or changes direction, it is experiencing acceleration. This can be caused by a force acting on the object, such as gravity or friction. Acceleration is a vector quantity, meaning it has both magnitude (the rate of change of velocity) and direction. It is commonly measured in meters per second squared (m/s^2).Rate this question:
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- 2.
When you say that a race car travels northward at 100 km/h, you are talking about its _________
- A.
Velocity
- B.
Distance
- C.
Acceleration
- D.
Speed
Correct Answer
D. SpeedExplanation
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.Rate this question:
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- 3.
If a train is slowing down, it is accelerating
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
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.Rate this question:
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- 4.
What is the distance a measure of?
- A.
Width
- B.
Length
- C.
Hieght
- D.
Area
Correct Answer
B. LengthExplanation
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.Rate this question:
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- 5.
What unit is the distance measured in?
- A.
Meters
- B.
Grams
- C.
Inches
- D.
Quarts
Correct Answer
A. MetersExplanation
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.Rate this question:
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- 6.
Speed in a given direction is...
Correct Answer
velocityExplanation
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.Rate this question:
- 7.
The basic SI unit of length is the...
Correct Answer
meterExplanation
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.Rate this question:
- 8.
Scientists around the world use the ________, a system of measurements based on the number ten.
Correct Answer
ISU
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Current Version
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Mar 22, 2023Quiz Edited by
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Mar 08, 2010Quiz Created by
Chrisv1812
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