2. Waves Course, 1.2: Spring Waves
Teaching Slides, 1.2
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Waves Course, 1.2: Spring Waves

3. Waves Course, 1.2: Spring Waves
Science Log Q4 week 3
Tuesday 4/11/2017
If a pulse is 24 beats in 15 seconds, what is the rate in beats per minute? What is the frequency?
Waves Course, 1.2: Spring Waves

4. Waves Course, 1.2: Spring Waves
Focus question Page 7
Next couple of days you are going to create and observe waves to learn more about what defines a wave.
FQ 1.2 What defines a wave?
Waves Course, 1.2: Spring Waves
Step 1

5. Waves Course, 1.2: Spring Waves
Waves can transmit energy in differing ways that allow the waves to travel very long distances.
In this investigation, you will examine two ways that wave energy can be transmitted.
You will create two types of waves and study how they travel.
You will use spring to make waves.
Waves Course, 1.2: Spring Waves

6. Spring care guidelines Teacher master A
1. The spring is a delicate piece of science lab equipment that you are entrusted with. 2. Transport the spring in its box to and from the materials station. 3. At all times, keep the spring entirely in contact with the table surface. 4. The spring should never be dangled or waved through the air. 5. If a spring accidentally becomes tangled, immediately call your teacher over to assess the situation.
Waves Course, 1.2: Spring Waves
Step 3

7. Waves Course, 1.2: Spring Waves
4. Compression waves
What does compress mean, discuss at your table.
Compress means to push something into a smaller space.
You will be compressing the spring to create a compression wave, which can also be called longitudinal wave.
Compression wave a wave in which the wave’s medium is compressed in the same direction as the movement of the wave; also called a longitudinal wave.
Waves Course, 1.2: Spring Waves

8. Make compression waves draw and label this on page 8
Teacher master B, Making Spring Waves
Waves Course, 1.2: Spring Waves
Step 4

9. Make compression waves page 9
Teacher master C, Compression Waves
Waves Course, 1.2: Spring Waves
Step 4

10. Waves Course, 1.2: Spring Waves
5. Reflection
What happened to the masking-tape flag?
It moved along the table as the compression wave moved through the spring.
Where did the masking-tape flag end up?
In the same spot where it started.
When you made a single compression wave, what happened when the wave reached the end of the spring?
It bounced back or reflected.
Reflect is the reversal of direction of the wave, bouncing back of waves off an object.
Did the entire strength of the wave reflect?
No some of the energy of the wave was absorbed when it hit the anchor’s hand.
Waves Course, 1.2: Spring Waves
Step 5

11. Make a series of compression waves
Teacher master C, Compression Waves
Waves Course, 1.2: Spring Waves
Step 6

12. Waves Course, 1.2: Spring Waves
7. Share observations
Return the springs to their boxes
Was there any reflection in the series of compression waves?
Discuss possible explanations and use your observations as evidence to support your ideas.
Waves Course, 1.2: Spring Waves
Step 7

13. Waves Course, 1.2: Spring Waves
8. Wave characteristics
You have just observed you first waves in this investigation.
The motion of the spring that you observed was a compression wave.
The compression wave might not look like what you think of as a typical wave. As you will learn in this class, there are many types of waves.
Waves Course, 1.2: Spring Waves
Step 8

14. Waves Course, 1.2: Spring Waves
8. Wave characteristics
All waves have two things in common:
They move in a back-and-forth pattern.
They transfer energy.
Waves Course, 1.2: Spring Waves
Step 8

15. Waves Course, 1.2: Spring Waves
8. Wave characteristics
What back-and-forth pattern of motion did you see with the series of compression waves?
The wave-maker released the pulses in a regular pattern. The waves moved to the end and reflected.
What energy did the compression wave transfer?
Motion energy
Energy of motion is called kinetic energy.
Waves Course, 1.2: Spring Waves
Step 8

16. Waves Course, 1.2: Spring Waves
8. Wave characteristics
The energy of the wave transferred to your hand or the table, but the metal of the spring ended up where it started.
Waves transfer energy, not matter.
Energy of motion is called kinetic energy.
When you saw the metal of the spring moving, you were observing kinetic-energy transfer.
Waves Course, 1.2: Spring Waves

17. 8. Wave characteristics page 8
Not all waves transfer kinetic energy.
We will learn about waves that transfer other forms of energy.
As we continue to explore waves, keep these two things in mind.
Each time you see a wave, you should be able to identify a back-and-forth pattern of motion and a transfer of energy.
Label and add phrases to page 8 including the concepts compression, reflection, and kinetic energy.
Waves Course, 1.2: Spring Waves