# SCIENCE 10_PRE-TEST Second Quarter

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30 questions
• Q1

Which electromagnetic wave has the highest energy?

Gamma rays

Visible light

Ultraviolet wave

45s
• Q2

What happens to the frequency and wavelength if the energy of the wave decreases?

wavelength increases, frequency increases

wavelength increases, frequency decreases

wavelength decreases, frequency decreases

wavelength decreases, frequency increases

45s
• Q3

Radio waves, X-ray waves, and microwaves are detected to be travelling in a vacuum. If the waves have a wavelength of 2 x 103 m, 2 x 10-9 m, 2 x 10-1 m respectively, which of the three travels the fastest?

X-ray waves

Microwaves

They all travel at the same speed.

60s
• Q4

An FM radio station broadcasts at 90.5 MHz (9.05 x 107 Hz). The radio wave travels at the speed of light, what is its wavelength?

3.31 m

0.04 m

2. 72 x 1016

2. 72 x1010 m

60s
• Q5

A gamma ray with a frequency of 6.2 x 1019Hz is fired on an unknown object in space. The value of Planck’s constant is 6.626 x 10-34 Js. How much energy does the wave carry?

4.11 x 1014 J·s

4.11 x 10-14 J

4.11 x 1014 J

4.11 x 10-14 J·s

30s
• Q6

What will happen if the antenna of the analog television is placed inside the house?

Pictures and sound transmitted are strong due to its enclosed location.

Pictures are clear, but the sound is intermittent due to its enclosed location

Pictures and sound transmitted are weak due to the location of the transmitter

Pictures are blurred, but the sound is good due to the transmitter’s location

45s
• Q7

Which is NOT included in the group for radio communication?

Oscillator

Amplifier

Antennas

WIFI Router

45s
• Q8

Which causes sugar, water, and fat to vibrate at extremely high frequencies?

Kinetic energy

Microwave energy

Cavity magnetron

45s
• Q9

Which item must NOT be placed inside the microwave oven?

Foil

Styrofoam

Pyrex cup

Hard-boiled eggs

45s
• Q10

Which is the center of transmitting and receiving radio waves towards television and radio communication?

Wires

Base Station Antenna

Speakers

LCD’s

45s
• Q11

What form of electromagnetic radiation has the most energy?

Gamma-rays

Microwaves

X-rays

45s
• Q12

Which is NOT a probable result of the human tissue’s exposure to ionizing radiation?

Cancer

Death

Cellular damage

Viral infection

45s
• Q13

What does ionizing radiation remove from atoms?

Nucleus

Electrons

Neutrons

Protons

45s
• Q14

What is the difference between ionizing and non-ionizing radiation?

Ionizing radiation is a naturally occurring phenomenon and non-ionizing radiation is only created artificially.

Ionizing radiation has high energy that can remove an electron from the atom, but non-ionizing does not.

Non-ionizing radiation is a naturally occurring phenomenon and ionizing radiation is only created artificially.

45s
• Q15

How can we protect ourselves from harmful electromagnetic radiation?

Spend time outdoors

Limit sun exposure

Increase cell phone use