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Fourth Form Quiz

Authored by Kevin Ralley

Physics

4th Grade

Used 4+ times

Fourth Form Quiz
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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

X-rays are used to image broken bones because...

Bones absorb X-rays while X-rays are transmitted through soft tissue.

Soft tissues absorb X-rays while X-rays are transmitted through bone.

X-rays have a relatively high frequency and they turn photographic film black.

X-rays are not harmful and so ideal for medical imaging.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Radio-waves are used for long-range communication because....

They have a relatively long wavelength which means they are less susceptible interference.

They reflect off the the upper-atmosphere (ionosphere) making them ideal for long range communication.

They travel at the speed of light and this speeds up communication.

They have a short range of wavelengths making it easier to encode information in them.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Microwaves are used for satellite communication because...

They have a very high frequency and are therefore able to transmit information at a much faster rate.

They are relatively long wavelength and so less susceptible to interference.

They are relatively long wavelength and travel at the speed of light.

They can penetrate the Earth's upper atmosphere (ionosphere)

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Gamma rays are used to sterilize medical equipment because...

They have a low frequency and so less likely to cause damage to the equipment.

They have a very high frequency and able to destroy bacterial cells and viruses.

They cause metal instruments to heat up thereby sterilizing the metal surfaces.

They are relatively straightforward to produce.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Ultraviolet light is used for detecting forgeries because...

It is invisible to the human eye.

It causes certain inks to fluoresce and produce visible light when UV is shone upon them.

UV is not harmful to humans.

UV (or so called black light) has lower frequency than microwaves and so less likely to cause damage to any artifact being examined.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of these is not a vector?

Weight

Upthrust

Speed

Velocity

Acceleration

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of these is not a scalar?

Mass

Temperature

Density

Light intensity

Upthrust

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