States of Matter
What is anything that has mass and takes up space?
Matter
Is cutting paper a physical or a chemical change?
Physical Change
Does heating usually cause materials to expand or contract?
Expand
What is a push or pull called?
Force
What force pulls objects toward Earth?
Gravity
What state of matter has a definite shape and volume?
Solid
What type of change creates a new substance?
Chemical change
What happens to most materials they cool?
Contract
What is a change in an object's position called?
Motion
What force opposes motion between two surfaces that are touching?
Friction
What state of matter takes the shape of its container but has a definite volume?
Liquid
Is melting ice a physical or chemical change?
physical
What do we call a material that slows the transfer of thermal energy?
Insulator
What happens when balanced forces act on an object that is not moving?
The object stays still.
Which surface usually produces more friction: carpet or smooth tile?
What tool measures of the mass of an object?
A balance
Name 2 signs that a chemical change may have occurred.
Gas formation, unexpected color change, temperature change, or formation of a solid.
Why is a metal spoon considered a good conductor of heat?
Metal allows thermal energy to transfer easily.
What can an unbalanced force do to an objects motion?
It can change an object's speed or direction.
Why does a ball thrown upward eventually fall back toward the ground?
Gravity pulls the ball back toward Earth.
A sealed container holds two objects weighing 25 grams and 35 grams. What is their total mass?
60 grams
When baking soda and vinegar are mixed, bubbles form. What evidence suggests a new substance has formed?
The formation of gas (bubbles).
Why are oven mitts made from insulating materials?
Oven mitts slow the transfer of thermal energy and protect our hands from the hear.
Two students push a box in opposite directions. One pushes with 10 newtons of force and the other pushes with 6 newtons. What is the net force acting on the box?
4 newtons
How does friction help the brakes on a bicycle stop the bicycle?
Friction pushes against the wheels that are in motion and slows the bike down.