5th - Science Unit 3 Lesson 1 notes

Question 0

What is the length of the arrow on the grid which can be measured with a ruler?

Answer 0

Distance

Question 1

What are the two parts of motion?

Answer 1

Distance and direction

Question 2

What units is distance measured in?

Answer 2

Meters (m), kilometers (km), feet (ft) or miles (mi)

Question 3

What is where the arrow is pointing?

Answer 3

Direction

Question 4

How do you measure direction?

Answer 4

Using a compass or protractor

Question 5

What words do we use to describe direction?

Answer 5

North, south, east and west

Question 6

What do you need from which to measure position or motion?

Answer 6

Frame of reference

Question 7

How do you calculate speed?

Answer 7

You divide the distance traveled by the time spent traveling.

Question 8

What are units of speed?

Answer 8

Are units of distance per unit of time, such as meters per second (m/s), kilometers per hour (km/h), feet per second (ft/s), or miles per hour (mph).

Question 9

Compare and contrast speed to velocity.

Answer 9

(Speed is how fast an object’s position changes over time. Velocity is a measurement that combines both the speed and the direction of a moving object.). Both speed and velocity tell you how fast but velocity also tells you what direction..

Question 10

How do you determine velocity?

Answer 10

Xxxxxx

Question 11

Is the change in velocity over time for an object?

Answer 11

Acceleration

Question 12

An object accelerates when?

Answer 12

It changes its velocity over time (when it speeds up or down).

Question 13

Acceleration means what?

Answer 13

Either the speed or direction has changed

Question 14

How do you calculate acceleration?

Answer 14

Change in speed divided by time equals acceleration.

Question 15

What units is acceleration given?

Answer 15

(m/s)/s

Question 16

What is it called when an object is losing speed?

Answer 16

Decelerating

Question 17

Explain how acceleration of an object can change even though speed of that object stays the same.

Answer 17

A change in velocity does not just mean a change in speed…it can mean a change in direction.

Question 18

What can cause a change in momentum?

Answer 18

When you change mass or velocity

Question 19

What is the result of an object having MORE momentum?

Answer 19

The easier it is for that object to move other objects.

Question 20

How do you find an object’s momentum?

Answer 20

It is the product of mass multiplied by velocity

Question 21

What are units of momentum?

Answer 21

Kilograms meters per second (kg m/s) or gram meters per second (g m/s)

Question 22

What makes it hard to change an object’s momentum?

Answer 22

Interim

Question 23

What is the tendency of any object to resist a change in motion or of a moving object to keep moving in a straight line?

Answer 23

Inertia

Question 24

What happens to the inertia of an object as the mass of the object increases?

Answer 24

It increases

Question 25

Which would be more difficult to stop a professional hockey player at 4 m/s or a fifth grader skating at 4 m/s? Why?

Answer 25

A professional hockey player because he has more mass.