What are the three most common states of matter?

Solid, gas, and plasma Solid, liquid, and gas Liquid, vapor, and air Gas, vapor, and solid

What causes matter to change from one state to another?

Gravity Changes in temperature or pressure Friction Electric charge

Which state of matter has a definite volume but no definite shape?

Gas Liquid Solid Plasma

What force pulls all objects toward Earth's center?

Friction Magnetism Gravity Air resistance

What type of energy is stored in an object because of its position?

Kinetic energy Thermal energy Potential energy Sound energy

What type of energy is associated with moving objects?

Light energy Thermal energy Kinetic energy Elastic energy

Friction always acts in what direction relative to motion?

In the same direction Opposite the direction of motion Perpendicular to motion Upward

What is the measure of how much matter an object contains?

Weight Density Mass Volume

Which of these is an example of potential energy?

A rolling ball A stretched rubber band A burning candle A moving car

Which form of energy travels in waves and can be seen by the human eye?

Sound energy Light energy Thermal energy Chemical energy

Which form of energy is caused by vibrating particles?

Thermal energy Light energy Sound energy Nuclear energy

Which material property measures how much mass is packed into a certain volume?

Elasticity Density Hardness Conductivity

What is the upward force that acts against gravity on an object in a fluid?

Friction Buoyant force Magnetism Pressure

What kind of energy do hot objects emit?

Kinetic energy Thermal energy Mechanical energy Chemical energy

When a ball falls to the ground, what energy transformation occurs?

Kinetic to potential Potential to kinetic Thermal to chemical Light to thermal

Which of these is an example of a contact force?

Gravity Magnetism Friction Electrostatic force

What form of energy is released when wood burns?

Nuclear energy Mechanical energy Chemical energy changes to heat and light Sound energy

What happens to particle motion as temperature increases?

Particles move slower Particles stop moving Particles move faster Particles become heavier

What is the force that resists the motion of two surfaces sliding against each other?

Gravity Friction Magnetism Elastic force

What form of energy travels fastest through space?

Sound energy Thermal energy Light energy Mechanical energy