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Uses of Light and Sound in Technology — Free MYP1 Sciences Practice Questions
1QuestionApplications of Light in Everyday LifeConcept Practice
3 marks~5 minCriterion A
The diagram shows a torch with five parts labelled A to E.
A = bulb, B = reflector, C = lens, D = switch, E = battery.
A = bulb, B = reflector, C = lens, D = switch, E = battery.
a
Name the part that produces the light. [1]
b
Describe what the reflector (B) does to the light inside the torch. [1]
c
The torch can be powered by a battery or plugged into a wall socket. Describe one way these two energy sources are different. [1]
Solutions
2QuestionUltrasound in Medicine and IndustryConcept Practice
6 marks~9 minCriterion D
A doctor uses an ultrasound machine to check a patient's liver. The low setting gives a blurry image but is very safe. The high setting gives a clear image but slightly heats the body tissues it passes through.
a
Name one benefit of using the low setting for the patient. [1]
b
Describe what happens to the patient's body tissues when the high setting is used. [2]
c
A doctor must choose between the low setting and the high setting. Describe one reason to choose each setting, and state which setting you think the doctor should try first. [3]
Solutions
3QuestionApplications of Light in Everyday LifeConcept Practice
3 marks~5 minCriterion B
A student shines a flashlight at a wall and measures the brightness at different distances.
| Distance (cm) | 10 | 20 | 30 | 40 |
|---|---|---|---|---|
| Brightness (lux) | 800 | 200 | 90 | 50 |
a
Identify what happens to the brightness as the distance increases. [1]
b
Describe the pattern using two values from the table. [1]
c
Compare how quickly the brightness changes when the flashlight is close to the wall with how quickly it changes when the flashlight is far from the wall. [1]
Solutions
4QuestionLight and Sound in Entertainment SystemsConcept Practice
4 marks~6 minCriterion C
A student claps near a flat wall and hears the echo. The table shows how long the echo takes to return at different distances.
| Distance (m) | 10 | 20 | 30 | 40 |
|---|---|---|---|---|
| Echo delay (s) | 0.06 | 0.12 | 0.18 | 0.24 |
a
Identify the echo delay when the distance is 20 m. [1]
b
Describe what happens to the echo delay as the distance increases. [1]
c
A friend says: "Standing twice as far from the wall means you wait twice as long for the echo." State whether you agree or disagree, and give one reason using the data. [2]
Solutions
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