Opposites ________________.
attract
A child pushes a box around the room. (This is an example of ______________.)
Unbalanced forces
Balanced forces
Potential energy
Chemical energy
the ability of an object to push or pull on another object that has the magnetic property.
magnet
pole
magnetism
magnetic field
Cooper designs and builds a toy car and is about to test the speed of the car bay pushing it down a ramp. What tools should he use to measure the speed of the toy car?
A measuring cup and a scale
A scale and a stopwatch
A stopwatch and a ruler
A ruler and a scale
Objects can only move on a straight line.
False
True
Which pair of balloons will repel each other?
A
B
C
All matter is made up _________________.
big particles everyone can see
small particles with positive, negative, or neutral charge.
Electricity is an ______________ force.
invisible
visible
One of two ends of a magnet.
pole
magnetism
magnetic field
magnet
Which causes a shock when a person touches a doorknob?
insulated wires
static electricity
electric current
a broken circuit
A force that happens when an object rubs another object is called ____________
Magnetism
Friction
Gravity
A force is a ___________________.
Pushing
Push or a pull
The amount of gravity between two objects
A pull between two objects
Two children are holding one end of a rope each. They pull on the rope in opposite directions. The rope is not moving. What conclusion can be made about the forces that the children apply on the rope?
Forces are balanced. Children have same amount of strength.
Motion is the process of change in an objects ______________.
Movement
Position
Speed
Distance
An object will have a change in motion when the forces acting on it are __________________.
Equal
Not equal
A positive charge will attract _____________________charge.
a neutral charge
a negative charge
another positive charge
Hitting a nail with a hammer is a _____________.
Strike
Pull
Crash
Push
Some kids played racing three toy cars. Each one started at the same time. The following drawing shows the end of the race.
Car A
Car C
Car B
All had same speed.
Electricity can ___________ trough a wire and make things work.
fly
flow
stand
An object with a force that can attract or repel certain materials.
pole
magnetism
magnetic field
magnet
A magnet _________________ paper clips.
repels
attracks
__________________ is necessary to move a car compared with a bicycle.
Less force
More force
No force
The same force
A magnet _________________ plastic bag.
does nothing to a
repels
atracks
_________________ forces act on an unmoving object.
Balanced
Unbalanced
A north pole will attract another magnet's _______________ pole.
north
south
The forces that make an object move are called __________________ forces.
Unbalanced
Balanced
A material that is often affected by the push and pull of magnets.
magnetism
metal
magnet
pole
Balanced forces cancel each other out when acting on an object.
True
False
Same charges _________________.
repel
attract
Which would be attracted to a magnet?
an ice cube
a wax crayon
an iron nail
a copper penny
Jacob is walking a small dog and a big dog. Suddenly, both dogs pull on opposite directions. Which direction will Jacob be pulled?
Towards the smaller dog
Towards the dog that applies more force
Towards the bigger dog
In the opposite direction of the dog that applies more force
_____________ have a neutral charge.
electrons
protons
neutrons
Which of the following are ways to measure movement?
Direction, time, prediction
Prediction, time, speed
Distance, time, speed
Direction, distance, speed
_____________ have a negative charge.
neutrons
electrons
protons
_____________ have a positive charge.
electrons
neutrons
protons
Which is an example of static electricity in nature?
rain
waterfall
volcano
lightning
A region of magnetic force around a magnet
magnet
magnetism
pole
magnetic field