1. What links these two?

2. Ultrasound and echoes Success Criteria Today you will:
State what ultrasound is
Describe some uses for echoes
Explain how animals use echolocation

3. How is this picture taken?

4. What is ultrasound?
Ultrasound are sound waves that are too high pitched for humans to hear. Ultrasound waves reflect differently off different surfaces. How do you think this creates an image?

5. Ultrasound and echoes Success Criteria Today you will:
State what ultrasound is
Describe some uses for echoes
Explain how animals use echolocation

6. What are echoes?
Echoes are reflections of sound waves. They can be used to find objects. What examples can you think of where this could be useful?

7. Ultrasound and echoes Success Criteria Today you will:
State what ultrasound is
Describe some uses for echoes
Explain how animals use echolocation

8. Echolocation

9. Echolocation
Describe the next stages of echolocation after the animal sends out a signal.
Why is echolocation more effective in water than in air?
Why do many animals use ultrasound rather than audible sound for echolocation?

10. Ultrasound and echoes Success Criteria Today you will:
State what ultrasound is
Describe some uses for echoes
Explain how animals use echolocation

11. Ultrasound vs. echoes
Which of these use ultrasound and which use echoes? Sonar on boats Echolocation by bats Scanning for unborn babies Communication in dolphins

12. Ultrasound-upsidedown
Think about the uses for ultrasound and echoes that we have discussed today. Write a newspaper article to describe the impact it would have if suddenly we could hear ultrasound!!