Starter quiz
- Starting with red light, sort the colours of light into the order they appear on the visible spectrum.
- 1⇔red
- 2⇔orange
- 3⇔yellow
- 4⇔green
- 5⇔blue
- 6⇔indigo
- 7⇔violet
- What is the bending of light called when it moves from one transparent medium into another?
- diffraction
- dispersion
- reflection
- refraction ✓
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- Starting with starting with the highest frequency, sort the colours of light into order of decreasing frequency.
- 1⇔violet
- 2⇔indigo
- 3⇔bue
- 4⇔green
- 5⇔yellow
- 6⇔orange
- 7⇔red
- Which of the following types of EM radiation, emitted by the Sun, can be absorbed by the skin, causing it to become darker?
- infrared
- visible light
- ultraviolet ✓
- X-rays
-
- Which of the following types of electromagnetic radiation causes the skin to detect feelings of warmth?
- infrared ✓
- ultraviolet
- X-rays
- gamma rays
-
- Which of the following oscillate to produce electromagnetic waves?
- electric fields ✓
- gravitational fields
- magnetic fields ✓
- wave medium
-
Exit quiz
- Which of following terms explain what is meant by 'absorbing'?
- attracting
- soaking up ✓
- sucking in
-
- Which of the following statements about the appearance of infrared radiation is correct?
- It always appears red.
- It sometimes appears red and is sometimes invisible.
- It appears both red and invisible at the same time.
- It is always invisible. ✓
-
- Starting with the one with the lowest frequency, put these types of electromagnetic radiation into order of increasing frequency.
- 1⇔infrared radiation
- 2⇔red light
- 3⇔violet light
- 4⇔ultraviolet radiation
- The higher the temperature of an object, the more infrared radiation it emits and the ______ the frequency of the most intense radiation emitted.
- 'higher' ✓
- Which of the following type of variable is shoe size in an investigation to find out if shoe size affects the distance you can kick a football?
- categoric variable ✓
- continuous variable
- control viriable
- dependent variable
-
- Which of the following does infrared radiation transfer to an object when it is absorbed?
- energy ✓
- heat
- radiation
-
Worksheet
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Lesson Details
Key learning points
- In a fair test, only the (independent) variable being investigated is changed
- The dependent variable is measured to investigate the effect of changing the independent variable
- Control variables are other factors that could be changed, but are kept the same in order not to affect the results
- The greater the intensity of black ink, the more easily a surface absorbs infrared
Common misconception
Infrared radiation is visible and is seen when objects glow.
Distinguish clearly between light radiation and infrared radiation in terms of what is visible and what is not visible.
Keywords
Absorption - Absorption is when an electromagnetic wave is incident on a surface and transfers some or all of its energy to that surface.
Infrared radiation - Infrared radiation means electromagnetic waves with frequencies in a range just lower than for red light.
Electromagnetic wave - Electromagnetic waves are oscillations (ripples) in electric and magnetic fields.
Frequency - The frequency of a wave is the number of oscillations that occur each second.
Control variable - Control variables are variables that must remain the same throughout an investigation.
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