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WorksheetsLight Waves Unit Review
Total questions: 49
Worksheet time: 50mins
To take in
absorb
emit
energy
light
The maximum height of a wave
amplitude
wavelength
frequency
spectrum
To give off
emit
absorb
frequency
wave
To pass through
transmit
reflect
emit
visualize
The distance from one peak of a wave to the next
amplitude
wavelength
reflect
frequency
The movement of energy can be tracked by observing...
how much light comes from a light source.
the changes the energy causes to matter/material.
the evidence of energy left behind.
the changes the light causes to energy.
When a material absorbs energy from light, the energy causes...
the material to change.
the light to reflect.
the light to change.
the material to give off energy.
Photosynthesis allows plants to make their own food by...
converting nutrients from the air into food.
converting stored energy into food.
converting light energy into food.
converting simple sugars from soil into food.
Different types of light can be identified by their...
amplitudes
frequencies
peaks
wavelengths
Light waves AND sound waves need a "medium" to travel through (air, water, etc.)
True
False
Which types of sunlight do not reach us?
gamma rays & x-rays
gamma rays & UV
UV & infrared
gammer & c-rays
Name each type of sunlight that can cause skin cancer.
UV, infrared, microwave
gamma, x-rays, UV
Ultraviolet light
UV, gamma, radio
Lighter or darker skin tones are caused by...
the amount of sunlight someone receives.
how close someone lives to the equator.
the amount of light waves someone receives.
the amount of melanin in skin cells.
CANNOT travel through empty space.
Why does this apple appear red?
The red light absorbed while other visible light is reflected.
The red light is reflected while other visible light is absorbed.
Our eyes can only see the red light even though all visible light is reflected.
Sort the types of light into the correct category.
ultraviolet (UV)
infrared (IR)
microwave
visible
radio
Melanin absorbs Ultraviolet light which protects genetic material from developing skin cancer.
True
False
Australia gets _______ ultraviolet light than other parts of the world.
more
less
a similar amount of
All light sources emit the same type of light
Yes indeed!
Absolutely not
Darker skin tone means the person has less melanin in their skin.
True
False
Draw what happens to energy when light is transmitted. Use yellow arrows to represent energy.
What happens to energy when light changes a material?
If light changes a material, the energy was absorbed.
If light changes a material, the energy becomes warm.
If light changes a material, the energy is removed.
Light cannot change a material.
Can light cause a plant to increase kinetic energy?
Yes. The plant can take in energy from the light.
Yes. The light pulled out energy from the plant.
No. Light can only heat up materials.
No. Light is not a physical thing so it cannot change physical things.
Can light cause a solar panel to get warm?
Yes. The solar panel can take in energy from the light.
Yes. The light pulled out energy from the solar panel
No. Light can only damage materials.
No. Light is not a physical thing so it cannot change physical things.
Why does light from the sun give us cancer when light from our flashlight does not?
Because our genetic material can take in energy from the sun, but not the flashlight.
Because sunlight pulls energy out from our genetic materials and the flashlight does not.
Because the sun gives off a type of light that carries energy, and light from the flashlight does not.
Because light from the sun carries heating molecules, and light for the flashlight does not.
Glue reflects ultraviolet. Glue transmits X-ray light. Which type of light is more likely to harden the glue?
Neither type of light is likely to harden the glue because the glue does not take in energy from UV or X-ray light.
There is no way to know because they are two different types of light, and different types of light can change a material in different ways.
The X-ray light is more likely to harden the glue because the X-ray light can pull energy out when it passes through.
The ultraviolet is more likely to harden the glue because the UV light can pull energy out when it bounces off.
When a material absorbs light, energy is (a) .
When a material transmits light, energy is (b) .
When a material reflects light, energy is (c) .
Reflect
Absorb
Transmit
Which statement best describes this image?
Different types of waves have different wavelengths.
Different types of waves have different amplitude.
All waves have the same amplitude and wavelength.
No energy was absorbed. Light was reflected or transmitted.
The material absorbed light. Light carries energy that can change a material.
When light is reflected, energy is reflected.
Draw what happens to energy when light is reflected. Use yellow arrows to represent energy.
Draw what happens to energy when light is absorbed. Use yellow arrows to represent energy.
Solar panels reflect microwave light. Solar panels transmit radio light. Solar panels absorb visible light. Which type of light is more likely to increase the electrical energy of the solar panel?
The visible light can cause the solar panel to increase electrical energy.
The microwave light can cause the solar panel to increase electrical energy.
The radio light can cause the solar panel to increase electrical energy.
Any of these types of light can increase the electrical energy because all light carries energy that can cause materials to change.
Which claim(s) does this piece of evidence from the "What is Melanin?" article support? (check all that apply)
The genetic material in skin cells with more melanin absorbs less UV light from the sun.
The genetic material in skin cells with less melanin absorbs more UV light from the sun.
Melanin absorbs UV light from the sun, which can keep some UV light from reaching genetic material.
UV light is attracted to skin cells.
The genetic material in skin cells with more melanin absorbs more UV light from the sun.
In order to see an object, light must be
transmitted into your skin
reflected off the object and into your eyes
reflected off the object then off the ground then into your eyes
absorbed by your genetic material
Earlier in this unit, you observed that a solar-powered toy moved when you shined a flashlight on it. Select all of the statements below that accurately explain how this happened.
Light from the flashlight carried energy.
There was energy in the toy that was activated by the light.
Energy from the flashlight was absorbed by the toy.
The flashlight absorbed energy from the toy.
In order for light to change an object, that object must _______ the light and its energy.
reflect
transmit
increase
absorb
When a material allows light to pass through it,
the material reflects the light and changes
the material absorbs the light and doesn't change
the material transmits the light and doesn't change
material transmits the light and changes
What does the evidence in these bar graphs show? (select all that apply)
There is not much difference in melanin level in people from both countries.
There is about twice as many people in Brazil with high levels of melanin compared to Australia.
There are more people in Australia with a low level of melanin compared to Brazil.
Both countries have a lot of people with a high level of melanin.
Different types of light can affect the same material or object in different ways.
True, for example radio waves are transmitted through plant cells while visible light is absorbed.
False, because all light is the same.
False, if an object can absorb light then it will be able to absorb it regardless of what type of light it is.
Can the paint on your house be damaged by the sun since it is exposed to the sunlight every day?
Yes, the paint can take in energy from the light, causing it to be damaged.
No, light can only damage things by warming them up, so it dannot damage the house's paint .
No, light is not a physical thing, so it cannot change physical things like house paint.
Yes, light can pull energy out of the paint, causing it to be damage.
Choose the diagrams below that represent the SAME type of light.
Which diagram shows a type of light that is DIFFERENT from the rest?
The sun's light is shining on aluminum foil. All of the wavelengths of light are being reflected or transmitted. Will the aluminum foil change?
Yes, light always changes materials.
No, materials only change when light is absorbed.
Yes, materials change when light is transmitted.
No, light cannot cause changes to materials.
Sunlight is shining on a solar panel. Which type(s) of light are likely causing changes to the solar panel? (choose all that apply)
microwave
radio wave
gamma ray
x-ray
ultraviolet
Sunlight is shining on a piece of glass. Which type(s) of light are causing the glass to change? (choose all that apply)
ultraviolet
gamma ray
infrared
visible light
microwave
