# Science 11-PRETEST-Q2

## Quiz by JOCELLE VISTAL

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30 questions
• Q1

Which electromagnetic wave has the highest energy?

Visible light

Gamma rays

Ultravioletwave

30s
• Q2

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

wavelength increases, frequency decreases

wavelength decreases, frequency decreases

wavelength decreases, frequency increases

wavelength increases, frequency increases

30s
• Q3

Radio waves, X-ray waves, and microwaves are detected to be traveling in a vacuum. If the waves have a wavelength of 2 x 103 m, 2 x10-9 m, 2 x 10-1 m respectively, which of the three travels the fastest?

microwaves

They all travel at the same speed.

X-ray waves

30s
• Q4

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?

2. 72 x1016 m

0.04 m

3.31 m

2. 72x1010 m

30s
• 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 10-34Js. How much energy does the wave carry?

4.11 x 1014J

4.11 x10-14 J

4.11 x1014 J·s

4.11 x10-14 J·s

30s
• Q6

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

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

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

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

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

30s
• Q7

Which is NOT included in the group for radio communication?

WIFI Router

Oscillator

Amplifier

Antennas

30s
• Q8

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

Microwave energy

Cavity magnetron

Kinetic energy

30s
• Q9

Which item must NOT be placed inside the microwave oven?

Styrofoam

Foil

Hard-boiled eggs

Pyrex cup

30s
• Q10

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

Wires

LCD’s

Base Station Antenna

Speakers

30s
• Q11

What form of electromagnetic radiation has the most energy?

Gamma-rays

X-rays

Microwaves

30s
• Q12

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

Viral infection

Death

Cellular damage

Cancer

30s
• Q13

What does ionizing radiation remove from atoms?

Neutrons

Protons

Nucleus

Electrons

30s
• 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.

30s
• Q15

How can we protect ourselves from harmful electromagnetic radiation?

A.    Limitsun exposure

A.    Increasecell phone use

A.    Spend time outdoors

A.    Put your wireless smartphone near

30s

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