Technologies for Information Transfer Quick Check - Science - Lesson 7
1 -
A child holds a red ball. Why does the ball look red?(1 point)
A - Only red light waves reach the surface of the ball.
B - All visible light waves except red are absorbed by the ball.
C - All visible light waves except red are reflected by the ball.
D - Only red light waves are absorbed by the ball.
2 -
Why do sound engineers use spongy materials on walls?(1 point)
A - to transmit sound waves more clearly
B - to reflect sound waves better
C - to increase the frequency of sound waves
D - to absorb sound waves
3 -
What happens when a wave is absorbed by a material?(1 point)
A - The wave bounces off the surface of the material.
B - The wave supports the formation of an echo.
C - The wave transfers its energy to the material.
D - The wave passes through the material.
4 -
How does sunscreen work?(1 point)
A - It helps prevent the skin from absorbing UV waves.
B - It helps prevent the skin from reflecting UV waves.
C - It helps UV waves be able to pass through the skin.
D - It helps UV waves be able to pass through the air.
All answers are not to be used for cheating (unless that is what your purpose here is lol) they are only for me to check my already answers! If you have any questions please do ask me and any other people who might know will do the best of our abilities to answer. Also if you have answers please answer with "A B C D" This is just so we can keep things quick and easy to find! That is all thank you!
Correct Answers -
1 - B - All visible light waves except red are absorbed by the ball
2 - D - To absorb sound waves
3 - C - The wave transfers its energy to the material
4 - A - It helps prevent the skin from absorbing UV waves
its true, Sid_the_science_kid was 100% correct
Sid_the_science_kid is right i got 100%
Great to hear that! Sid_the_science_kid did a good job.
1 - C
2 - D
3 - C
4 - A
1 - The correct answer is A - Only red light waves reach the surface of the ball.
To explain why the ball looks red, we need to understand how light interacts with objects. When light hits an object, it can either be absorbed, transmitted, or reflected. In the case of the red ball, all visible light waves except red are absorbed by the ball, while red light waves are reflected. As a result, when we look at the ball, only the red light waves reach our eyes, making the ball appear red.
2 - The correct answer is D - to absorb sound waves.
Sound engineers use spongy materials on walls to absorb sound waves. When sound waves hit a surface, they can either be reflected, transmitted, or absorbed. By using spongy materials, the sound waves are absorbed, reducing the chances of reflections and echoes. This helps in improving the acoustics of a room or a recording space.
3 - The correct answer is C - The wave transfers its energy to the material.
When a wave is absorbed by a material, it transfers its energy to the material. This means that the material absorbs the energy carried by the wave, causing its particles to vibrate. This energy transfer can lead to heating of the material, as the absorbed wave energy is converted into heat energy.
4 - The correct answer is A - It helps prevent the skin from absorbing UV waves.
Sunscreen works by preventing the skin from absorbing UV waves. UV waves from the sun can be harmful to our skin, causing sunburns and increasing the risk of skin cancer. Sunscreen contains ingredients that act as a barrier, reflecting or scattering the UV waves before they can be absorbed by the skin. This helps protect our skin from the damaging effects of UV radiation.
Remember, these explanations are provided to enhance your understanding of the concepts and how to arrive at the correct answers.
1 - C
2 - D
3 - C
4 - A