Density and New Substances
Particles move fastest in which state of matter?
Gas
Most elements are what—metals or nonmetals?
Metals
If equal forces are acting in opposite directions, are they balanced or unbalanced?
Balanced
Energy in motion is called what?
Kinetic Energy
What law says that for every action, there is an equal and opposite reaction?
Newton's Third Law
Matter with definite volume but no definite shape is a…
Liquid
Elements like silicon that have characteristics of both metals & nonmetals are called what?
Metalloids
If 10 N right and 5 N left act on an object, what is the net force?
5 N to the right
Energy stored due to height is what kind of potential energy?
Gravitational Potential Energy
When you push on a wall, what force does the wall apply back to you?
Equal but opposite
Matter with definite shape & volume is a…
Solid
Elements used in technology like phones and batteries are often what group?
Rare Earth Metals
If 6 N up and 6 N down act on an object, what is the net force?
0 N
A stretched rubber band stores what kind of energy?
Elastic potential Energy
If a gas from a rocket pushes downward, what happens to the rocket?
It moves forward
Salt water is what type of mixture?
Homogeneous Mixture (solution)
Metals are good conductors of what two things?
Heat and Electricity
If forces are unbalanced, what happens to motion?
It changes/moves
Energy stored in food or fuel is called what?
Chemical Potential Energy
When a swimmer pushes water backward, what is the reaction force?
The swimmer moves forward
A salad is what type of mixture?
Heterogeneous Mixture
Nonmetals usually appear as what type of matter at room temperature?
Gases or brittle solids
12 N right and 15 N left—net force and direction?
3 N to the left
Which has more kinetic energy—a small object or big object (same speed)?
Bigger object
Name one pair of action–reaction forces during a basketball bounce.
Ball pushes the ground, the ground pushes back on the ball