Name:______date:______period:______(4)
Science 8: Ch 12.1 Measuring Motion (pages 336-343)
Key Concept______can be ______and describes in many ways
What is a reference point?
Define motion
What are three examples of reference direction? / 1.
2.
3.
What is the reference point in Figure 1 on page 336?
Based on the pictures in Figure 1, is the hot air balloon in motion?
In Figure 2 on page 337, where do the x and y axes meet?
In a two-dimensional system, how many reference directions are represented by the positive and negative directions on the axes (Figure 2)?
As the paper moves from Owen to Lupe, in Figure 2, what direction and axis is the paper moving?
As the paper moves from Lupe to Jeff, in Figure 2, what direction and axis is the paper moving?
As the paper moves from Jeff to Tony, in Figure 2, what direction and axis is the paper moving?
As the paper moves from Tony to Luis, in Figure 2, what direction and axis is the paper moving?
Define speed
Is the speed of an object rarely constant?
Define average speed
What is the equation for average speed?
What is the SI unit for speed?
What are three other units for speed? / 1.
2.
3.
How can we graph speed?
How do we measure position on a graph for speed?
What units is the y axis usually expressed in?
What units is the x axis usually expressed in?
On a graph for speed, what is the slope of the line equal to?
Using the graph in Figure 4, how long did the dog stop moving?
Using the graph in Figure 4, how long did the dog move the fastest?
If the dog moved 7 meters in 10 seconds, what was the dog’s average speed?
average speed = ------
What type of line would we see on the graph (Figure 4) if the dog moved at a constant speed?
Define velocity
Do the terms speed and velocity have the same meaning?
What does velocity include?
Which is correct if we are talking about velocity: 60 km/h or 60km/h south?
Using Table 1, record the three examples of speed / 1.
2.
3.
Using Table 1, record the three examples of speed and direction / 1.
2.
3.
Using Table 1, record the example for direction.
When is the velocity of an object constant?
Constant velocity is motion along what type of line?
The velocity of an object changes in what four situations? / 1.
2.
3.
4.
Does the velocity change if a bus drives a speed if 15 km/h south and then speeds up to 20 km/h south?
Does the velocity change if a bus drives a speed if 15 km/h south and then heads 15 km/h east?
Define accelerate
Define acceleration
What is a common unit for acceleration?
What is an increase in speed sometimes called?
What is a decrease in speed sometimes called what two terms? / 1.
2.
What is causing you to accelerate even when you are sitting still?
Objects moving in a circular motion always change what?
An object moving at a constant speed in a circular motion is known as what?
What are two examples of centripetal acceleration? / 1.
2.
How can acceleration can be shown on a graph?
Using the graph in Figure 8, how do we know the car’s acceleration is positive?
How does the line on the graph in Figure 8 tell you the car acceleration for the first 5 s?
What is the slope of the graph (Figure 8) from 5s to 7s?
Was the car accelerating between 5s and 7s (Figure 8)?
What happens to the car in between 7s and 10s?