
Unit test Review
Authored by Juliet Dumepnas
Science
9th Grade
NGSS covered
Used 5+ times

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39 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Benjamin is measuring the temperature of a room. What kind of quantity is temperature?
A quantity with direction
A quantity without direction
A quantity that is always positive
A quantity that varies with time
Answer explanation
Temperature is a scalar quantity, meaning it has magnitude but no direction. This distinguishes it from vector quantities, which do have direction. Therefore, the correct choice is 'A quantity without direction'.
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Avery is pushing a shopping cart at the grocery store. Which of the following quantities related to the cart is a vector quantity?
Temperature
Mass
Force
Time
Answer explanation
Force is a vector quantity because it has both magnitude and direction, which is essential when pushing a cart. In contrast, temperature, mass, and time are scalar quantities, lacking direction.
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Arjun is driving his car on a highway. He wants to calculate his speed. Which of the following formulas should he use?
Speed = Distance / Time
Speed = Displacement / Time
Speed = Distance × Time
Speed = Time / Distance
Answer explanation
The correct formula to calculate speed is Speed = Distance / Time. This formula shows that speed is determined by dividing the total distance traveled by the time taken to travel that distance.
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Liam is running a race. What is the unit of speed?
m/s
m/s²
m
s
Answer explanation
The unit of speed is meters per second (m/s), which measures distance traveled in meters over time in seconds. Other options like m/s² (acceleration), m (distance), and s (time) do not represent speed.
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Mia is riding her bicycle and notices that her speed increases as she pedals harder. Acceleration is defined as:
The change in speed per unit time
The distance traveled in a certain time
The total distance covered
The speed of an object
Answer explanation
Acceleration is defined as the change in speed per unit time, which explains why Mia's speed increases as she pedals harder. The other options do not accurately describe acceleration.
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Elijah and Aiden are running a race. Elijah runs in a straight line towards the finish line, while Aiden runs around the track. What is the difference between speed and velocity?
Speed is faster than velocity
Velocity includes direction; speed does not
Velocity is always constant
Speed is a vector quantity
Answer explanation
The correct choice is that velocity includes direction, while speed does not. Speed is a scalar quantity, measuring how fast something moves, whereas velocity is a vector quantity that specifies both speed and direction.
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Benjamin walks from his house to the park and then to the store. Displacement is:
Always equal to distance
A vector measurement of how far out of place an object is
The average speed of an object
The total distance traveled
Answer explanation
Displacement is defined as a vector measurement that indicates how far out of place an object is, considering both distance and direction. Thus, the correct choice is that displacement is a vector measurement of how far out of place an object is.
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