Forces & Motion
______ is the force that attracts metals
Magnetic
_____ is the force that pulls objects toward the earth.
Gravity
Light travels in a ______ line.
It travels in a straight line.
11. Which device protects against hearing damage? a) Glasses b) Earrings c) Earplugs d) Amplifiers
C - Earplugs
Sound is made when objects:
A) Melt
B) Vibrate
C) Shine
D) Float
B - Vibrate
List three things that can protect you from the impact of forces
Which example is considered muscular force?
A rock falling, clothing sticking together, a push-up, a landslide
List three examples of natural light.
Sun, fire, fireflies, etc
List three examples of artificial light.
Screens, light bulbs, flashlight etc
Which object makes its own light?
A) The Moon
B) A mirror
C) The Sun
D) A book
C - the sun
Which option is the best example of high friction?
a) Sliding down a slide
b) Car tires on a road
c) Walking in socks on a tile floor
d) Sledding down a snowy hill
B - Car tires on a road
Out of the following, what would not attract a magnet? Iron nail, steel pin, nickel coin or a gold ring
Gold ring
What is light?
Light is is a form of electromagnetic energy that our eyes can detect.
What is sound?
Sound is created when something vibrates and sends waves of energy or vibration into our ears.
_______ force is applied using parts of the body like arms or legs.
Muscular
Give 3 examples of natural forces
Gravity, Magnetic force, Electrostatic force
Lightning is an example of _________ force.
(Electrostatic, Muscular force, Friction, Gravity)
Electrostatic
______ is when light stops at an object and doesn’t reflect
Absorption
______is when light bounces off the surface of a material
Reflection
A soccer ball is sitting still on the grass. What must happen to make the ball move?
A) It gets colder
B) A force pushes or pulls it
C) The grass grows
D) The wind stops
B) A force pushes or pulls it
Which of these is an example of a pull force?
A) Kicking a ball
B) Opening a drawer
C) Pushing a shopping cart
D) Hitting a hockey puck
B) Opening a drawer
Friction is a force that:
A) Makes objects glow
B) Pulls objects toward Earth
C) Slows moving objects down
D) Makes objects lighter
C) Slows moving objects down
Which of the following is a translucent object?
a) A clear glass b) A frosted glass c) A tiny mouse d) A piece of wood
B - Frosted Glass
What is the speed of light? a) 3 kilometres per second b) 3000 kilometres per second c) 30 000 centimetres per second d) 300 000 kilometres per second
D - 300, 000 kilometres per second
What happens when light hits a mirror?
A) It disappears
B) It bends
C) It reflects
D) It makes sound
C - it reflects