d. A thermistor is a device whose when it is heated. It can be used .
e. A defibrillator is a device that transmits a large
muscle. This kick-starts the heart into a normal
again.
f. MRI scanners use a very strong field to see inside the body. This is created by
.
g. A particle accelerator is a device that uses large
to accelerate
charged particles to very high speeds. These particles are then collided with specially designed surfaces or with each other, converting their different forms.
energy into
h. When electrons strike a tungsten metal target, they produce
be used to take images of .
i. When particles collide in the , their energy is converted into in the form of
new particles. This is providing answers about what matter is made up of and how it is made.
. These can across the chest and heart B Infrared C Ultraviolet D Gamma ray
3. Describe the analogue and digital exchanges that take place when you make a video call over the internet. Use a diagram to support your answer and mention the components involved that convert the analogue signal.
4. ‘The internet has made our lives better.’ Write an evidence-based argument either defending or rejecting this statement.
5. Create a poster detailing the similarities and differences between a cathode ray tube, an X-ray tube, an MRI scanner and the Large Hadron Collider.
6. Describe, with the aid of diagrams, how an endoscope allows us to see an image of the inside of the body.
7. Make a list of three items that you use in everyday life that involve the conversion of analogue to digital signals. In each case, state the input and output of the device.
8. Compare radio waves and X-rays in terms of speed, energy and uses.
2. Identify waves A–D on the electromagnetic spectrum.
