Radiation Answers

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Andre listed some properties of electromagnetic waves.1) transfer thermal energy by radiation2) can transfer energy over great distances3) need matter to transfer energy through4) are disturbances that carry energy

A
Electromagnetic waves transfer thermal energy by conduction.
B
Electromagnetic waves can only transfer energy over short distances.
C
Electromagnetic waves can transfer energy through empty space.
D
Electromagnetic waves are not considered disturbances.
3

Which best explains how radiation is helpful in the plastics industry?

A
It makes plastics easier to shape.
B
It adds a protective layer to plastic.
C
It decreases the melting point of plastic.
D
It improves the strength and durability of plastic.
4

A farmer places unhatched chicken eggs under a heat lamp. How does the radiation help the eggs?

A
It keeps the area around the eggs cool until the eggs hatch.
B
It makes the eggs weaker so they are easier to break open.
C
It makes the eggs stronger so they do not break.
D
It keeps the eggs warm until they hatch.
6

Which best explains how thermal energy is transferred when someone holds a hand above a fire?

A
It is transferred by conduction and radiation.
B
It is transferred by only convection.
C
It is transferred by only conduction.
D
It is transferred by radiation and convection.
7

Which is an example of radiation?

A
Troy’s hand is burned when he touches hot wax.
B
Earth is heated by energy from the Sun.
C
A hot dog is held over a fire and gets warm.
D
Water is boiled in a pot on a stove burner.
8

Anya recorded the temperatures of four different smooth materials after they were placed under a heat lamp for thirty minutes.

Question illustration
A
Material W is less absorbent than material Z.
B
Material Y is the least reflective.
C
Material X is more reflective than material W.
D
Material Z is the least absorbent.
9

How does radiation help treat cancer?

A
It cools down the cancer cells and weakens them.
B
It cools down the non-cancerous cells and strengthens them.
C
It heats up the cancer cells and weakens them.
D
It heats up the non-cancerous cells and strengthens them.

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