Transcript Science Unit 1 Test Study Guide

Physical Science

This test covers what you learned in Unit 1
including:
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Contact and Non-Contact Forces
How to measure motion (speed and velocity)
Balanced and unbalanced forces
Newton’s Laws of Motion
Quiz yourself by going through the slides. To check
your answer or get to the next question, click on the
balloon car. Good Luck!
The amount of matter in an
object is called?
a. Weight
b. Mass
c. stuff
What do you call a force that
gravity exerts on an object’s
mass?
a.
b.
c.
Magnetism
Friction
Weight
What is a force that acts to
pull pairs of objects
together?
a.
b.
c.
Gravity
Magnetism
electricity
The tendency for an object
to stay in motion or to stay
at rest is called?
a.
b.
c.
acceleration
friction
inertia
Which picture shows magnetic attraction?
a.
b.
Click on the picture that
shows magnetic repulsion.
Is magnetism a contact or
non-contact force?
Pushes and pulls that result
from direct touching of
objects are called?
a. contact forces
b. non-contact forces
A push, pull or turn is
called?
a. a force
b. friction
c. a new dance move
What is the formula for speed and what do you
call speed in a certain direction?
a.
b.
c.
Time ÷ distance /
Distance ÷ time /
Distance ÷ time /
velocity
newtons
velocity
Friction caused by molecules
in the air is called?
a.
b.
c.
sliding friction
rolling friction
air resistance
A force that resists
movement of one surface
past another surface is
called?
a.
b.
c.
gravity
friction
magnetism
What do you call a change in
velocity?
a.
b.
c.
speed
acceleration
melocity
The greater the mass, the greater the
force needed to accelerate the object.
This is Newton’s
a.
b.
c.
First Law
Second Law
Third Law
An object in motion stays in motion, an
object at rest stays at rest unless acted
upon by an outside force.
This is Newton’s
a. First Law
b. Second Law
c. Third Law
For every action, there is an
opposite and equal reaction.
This is Newton’s
a.
b.
c.
First Law
Second Law
Third Law
Forces are measured in…..
a.
b.
c.
Meters
Grams
Newtons
 B.
Mass
 C.
Weight
A.
gravity

B.
Opposite poles attract
inertia
This is Newton’s First Law of
Motion
C.
Oops! Wrong Answer
Try again!
You got it!
Like poles repel each other.
Non-contact
Contact Forces
Example:
A force (of course!)
c. Distance ÷time = speed
velocity is speed in a certain direction
Air resistance
Important uses of friction:
a.
b.
c.
Walking – you
couldn’t walk without
friction between your
shoes and the
ground.
Writing – you couldn’t
hold a pencil without
friction.
Driving a car – you
couldn’t move
without friction
between the tires and
the road.
Problems from friction:
a.
b.
c.
Makes movement
difficult.
Wastes energy – in a
vehicle - excess friction
means extra fuel is
needed.
Wears things out –
machines with moving
parts can wear out due
to friction. Lubrication
such as oil can reduce
friction.
Newton’s Second Law of Motion
Force = mass x acceleration
Newton’s First Law of Motion
Also known as the Law of Inertia
Newton’s Third Law of Motion
Newtons
Acceleration