Forces
What force pulls objects toward the Earth?
Gravity
What are the two poles of a magnet called?
North and South
What type of motion does a swing make?
Back and forth motion (or pendulum motion)
What force helps you ride a bicycle up a hill?
Push force (from pedaling)
What happens if you push a toy car with more force?
It goes faster/farther
When forces are equal on both sides, they are called ____?
Balanced Forces
When you put two magnets together and they push apart, this is called ___?
Repulsion
When a ball bounces, it shows what type of pattern?
Up and down pattern (or repeating pattern)
Why do ice skaters glide so easily on ice?
There is very little friction
What happens when you try to push two north poles of magnets together?
They push apart/repel
Name one force that can slow down a moving object
Friction
Name two metals that magnets attract
Iron, steel, nickel, cobalt (any two)
What makes a toy car roll farther on a steeper ramp?
Gravity pulls it with more force
How do magnetic compasses help people?
They help find direction/navigate
If you roll two balls of different weights down a ramp, which reaches the bottom first?
They reach the bottom at the same time (if they're the same size)
True or False: Unbalanced forces cause objects to change speed or direction
True
What happens to magnetic force when you move magnets farther apart?
It gets weaker
Name two ways to measure motion
Distance and time (or speed and direction)
Why do astronauts float in space?
There is very little gravity
What happens to the speed of a toy car rolling from a higher ramp compared to a lower ramp?
The car on the higher ramp goes faster
What happens to a bike's speed when riding down a hill without pedaling?
It speeds up/increases (due to gravity)
If you cut a magnet in half, what happens to the poles?
Each piece becomes a new magnet with both poles
Why do wheels help objects move more easily?
They reduce friction
Name two machines that use magnets to work
Refrigerator magnets, electric motors, speakers, MRI machines (any two)
What would happen if you removed all friction from a rolling ball?
It would keep rolling forever (never stop)