WorksheetsScience 8 - Unit 3 Review B
Total questions: 30
Worksheet time: 10mins
Cellular phones transmit and receive signals using infrared radiation.
True
False
Electromagnetic radiation is a form of energy.
True
False
When an object is twice its original distance from a light source, it will receive one half of the light.
True
False
High frequency waves have a short wavelength.
True
False
The photoelectric effect occurs with blue light, but not red light.
True
False
The particle model of light states that light travels in packets of energy called photons.
True
False
A very smooth surface reflection produces a clear image of an object.
True
False
Light energy is easily absorbed by snow and ice.
True
False
A blue coat is blue because only blue light waves are being absorbed by the material.
True
False
If light can travel through a material, the material is called a medium.
True
False
If you move 20 cm closer to a plane mirror, your image is 40 cm closer to you.
True
False
Images seen on the overhead screen are considered to be real images.
True
False
Satellite dishes have a convex shape in order to focus radio signals onto one point.
True
False
When light travels from air into a diamond, it is bent away from the normal.
True
False
A human eye lens has the same shape as a concave lens.
True
False
Refraction is caused by different wave speeds.
True
False
Real images are ones that can be put onto a screen or “touched.”
True
False
Which of the following is not a form of electromagnetic radiation?
gamma rays
visible light
X-rays
sound
What type of electromagnetic radiation is emitted when an object gets hotter?
X-rays
radio waves
infrared radiation
gamma radiation
Which of the following colours has the longest wavelength?
red
blue
indigo
orange
What happens to the frequency of light as the wavelength increases?
The frequency increases.
The frequency decreases.
The frequency does not change.
The frequency is not related to the wavelength.
What do all photons have in common when in a vacuum?
speed
energy
frequency
wavelength
You can read a book because the white paper (a) light while the black print (b) light.
reflects
absorbs
light
Refraction is the process where light energy (a) when it travels from one medium to another.
bounces off something
is completely stopped
changes its direction
is partially absorbed
Which of the following will absorb the most light energy?
a. a clear plastic water bottle
b. a metal coffee mug
c. a black bowling ball
d. a pepperoni pizza
Which of the following objects transmit light?
river water
cedar trees
salmon
horses
Which of the lines on the diagram represents the incident ray?
Camera
Light
Object
Dashed line
How would the letter “R” appear in a mirror placed on the left side of the letter?
R
ᴚ
Я
Ꞁ
If a concave mirror produces no image, where is the object?
between the apex and focus
at F
between F and C
at C
What is the angle of reflection if the angle of incidence is 21°?
79°
121°
159°
21°
