1. Review Read the comments I have written in your book.
Complete your next steps in PURPLE PEN.
Correct any Spelling and Grammar mistakes in PURPLE PEN.

2. Can you explain why/how?
How many ducks will pass the red dashed line in both cases in one second?
Can you explain why/how?
Speed = 5m/s 1m
Speed = 1m/s

3. You may draw a diagram to help with your answer.
Lesson link
The diagram shows water waves approaching a boundary between deep water and shallow water. The arrow shows the direction of travel of the water waves.
The wave speed in the shallow water is less than the wave speed in the deep water.
The frequency of the waves in the shallow water is the same as their frequency in the deep water.
Explain what happens to the direction and the wavelength of these waves when they pass from the deep water into the shallow water.
You may draw a diagram to help with your answer.

6. Engage
When a wave reaches a boundary (interface) between materials it can be:
refracted, reflected, transmitted, absorbed.
Which of these are happening in this scene and where?

7. Learning Objectives By the end of this lesson you will be able to…
…recall what happens when waves are reflected or refracted.
…describe what happens when waves are transmitted or absorbed.
…explain how changes in velocity, frequency and wavelength are related.

8. Waves Crossing Boundaries
Draw a line under last lesson’s work and write today’s title in your book...
12/11/2018
c/w
Waves Crossing Boundaries

9. How can you tell that the prism is transmitting and refracting light?
Explore
Light from a light bulb or the Sun is called white light and is made up of a mixture of different frequencies of light.
How can you tell that the prism is transmitting and refracting light?
How does the photo show that different frequencies are refracted different amounts?

10. Explain
Suggest how well the material of the walls reflects and absorbs sound waves.
Explain your answer.
This is an anechoic chamber.
What do you think anechoic means?

11. Compare and contrast reflection and refraction at a boundary
Explain
Acoustic mirrors
Exam style question:
Compare and contrast reflection and refraction at a boundary

12. Extend

13. Extend How the cochlea works
Human ears can detect sounds from 20Hz to Hz.
What does this statement mean?

14. Bone conduction headphones
Extend
Bone conduction headphones

15. Evaluate Learning Journal
In the back of your book complete your reflection on your learning today.
Learning Journal
12/11/2018