Chapter 1 Review Grade-9Jan 10, 2021

• Science
• Secondary Education

SCIENCE

CHAPTER REVIEW

JAN 10, 2021 

Ms.Famin

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OBJECTIVES 

relate the description of an object's position on a reference point 

compare and contrast speed and velocity 

describe acceleration 

lesson 1- Position and motion 

A reference point is a starting point you choose to describe the location, or position of an object.

 A position is an object's distance and direction from a reference point 

Motion is the process of changing position

distance depends on the path taken and displacement depends on final and initial positions

The man is in motion compared to which reference point?

1. the boat
2. the buoy
3. the fishing line
4. the ocean

Which of the following requires knowing only distance, direction, and a reference point?

1. speed
2. position
3. velocity
4. acceleration

Displacement measures the _________ between the starting and stopping points.

1. distance and direction
2. distance and speed
3. direction and speed
4. mass and volume

Lesson 2- Speed and velocity

Speed is a measure of distance an object travels per unit time 

Velocity is the speed and direction of a moving object 

velocity changes when speed and direction of an object changes.

Which is distance divided by time?

1. acceleration
2. speed
3. velocity
4. position

Describe three ways the ball can change velocity

lesson-3 Acceleration 

Acceleration is a measure of the change in velocity during a period of time 

When something slows, its acceleration is __________.

1. positive
2. instantaneous
3. negative
4. constant

When something accelerates then stops accelerating, what happens to the object?

1. it slows
2. it goes faster
3. it stops completely
4. it continues to move at a constant velocity

An object that has the same speed but changes direction is __________.

1. slowing down
2. speeding
3. accelerating
4. displacing

unit of velocity 

unit of acceleration

speed 

acceleration 

m/s

m / s²

What is the speed of this car?

1. 6 m/s
2. 9 m/s
3. 12 m/s
4. 18 m/s

After 2.0s, Isabela was riding her bicycle at 3.0 m/s on a straight path. after 5.0 s she was moving at 5.4 m/s. what was her acceleration?

1. 10 m/s
2. 1.7 m/s
3. 1.7 m/s^2
4. 10 m/s^2

Name two things you want to know more in the chapter