Fill in the blank: ________ is the change of state from a gas to a solid.

Fill in the blank: ________ is the process in which a gas changes to a liquid.

Fill in the blank: ________ is the change in a substance from a liquid to a gas by addition of energy.

In order for matter to change from a solid to a liquid or from a liquid to a gas, particles of matter must absorb energy.

In order for matter to change from a gas to a liquid or from a liquid to solid, particles of matter must lose energy.

Fill in the blank: ________ occurs when a liquid cools to a point at which its particles no longer have enough energy to overcome the force of attraction between them.

The temperature at which a substance freezes is known as its ________.

The temperature at which a substance melts is known as its ________.

Underground rock in this state is called ________.

After magma erupts, it is called ________.

Water vapor is water in the ________ state.

Vaporization is the process in which a ________ is converted to a gas.

The temperature at which a substance boils and changes to a gas is called the ________.

Evaporation is the change in a substance from a liquid to a gas by the ________ of energy.

Which of the following is NOT a factor that affects the rate of evaporation?

Gas forms bubbles that rise to the surface of the liquid because gas is ________ dense than liquid.

Condensation is the process in which water vapor—or another gas—changes to a ________.

The temperature at which condensation occurs is called the ________ point.

Sublimation is the process in which a solid changes directly to a ________.

When air temperature reaches the dew point, water vapor starts condensing. It may form ________, clouds, or fog.

Without condensation, the water cycle would be ________ and Earth's water could not recycle.

Force - ________ acting on an object. (Fill in the blank)

Friction - ________ that opposes motion between two surfaces that are touching. (Fill in the blank)

Applied force - ________ is force that a person or thing applies to an object. (Fill in the blank)

Speed - how fast or slow ________ moves.

Acceleration - measure of the change in ________ of a moving object. (Fill in the blank)

Vector - a quantity possessing both ________ and ________.

Elasticity - ability of a material to return to its original shape after being ________ or ________.

Elastic force - a counter force in the ________ direction. (Fill in the blank)

Weight - a measure of the force acting on an object by ________. (Fill in the blank)

Energy - the ability to do ________. (Fill in the blank)

Everytime the motion of an object changes, it's because a force has been applied to it.

The farther the material is stretched or compressed, the greater the elastic force becomes.

The farther you stretch the band, the greater the resistance is.

Rougher surfaces have more friction between them than smoother surfaces.

What is gravity?

What does weight measure?

Fill in the blank: A scientific law is a statement describing what always happens under certain _______ in nature.

Anything that has mass, no matter how small, exerts gravity on other matter.

True or False: The farther two objects are from each other, the stronger the force of gravity between them.

On the moon, which has less gravity, the same mass would weigh less. Weight is measured with a _____

Gravity applies to everything in the universe that has _____

Who was the first to suggest that gravity is universal and affects all objects in the universe?

Newton’s law was the first scientific law that applied to the entire _____

Objects with greater mass have a ______ force of gravity between them.

What is a theory?

What is Einstein’s theory of general relativity?

A law in science is a description of what always occurs in _______.

Who came up with a theory of gravity that actually explains gravity rather than simply describing its effects?

Energy is the ability to move matter or change matter in some other way. Energy can also be defined as the ability to do work, which means using force to move an object over a _______.

Energy can take different _______.

Anything that is moving has _______ energy.

Kinetic Energy is the energy of _______ matter.

What is the SI unit of work or energy?

The amount of kinetic energy in a moving object depends directly on its _______ and velocity.

An object with greater mass or greater velocity has more _______ energy.

Potential Energy is energy that is _______ in a person or object.

What is the SI unit for energy in the context of potential energy?

Mechanical Energy - The form of energy that involves _______.

Chemical Energy is stored in the bonds between the atoms of _______.

Anything that is raised up above Earth’s surface has the potential to fall because of _______.

The farther the object is stretched or compressed, the greater its _______ energy is.

Electrical Energy - the work done by an _______ circuit.

Chemical Energy - energy that is stored in the chemical bonds in _______.

Thermal Energy - the total energy of a substance due to the movement or _______ of particles.

Energy Conversion - the process in which one type of energy changes into _______.

Law of conservation of energy - law stating that energy cannot be _______ or _______ in chemical reactions.

Sound Energy - energy that travels in waves through matter from a _______ object.

Energy isn’t used up or lost when it changes form.

Any of these forms of energy can change into any other form.

One form of energy can change into two or more different forms.

Fill in the blank: A ________ is a natural resource that is consumed or used up faster than it can be made by nature; includes fossil fuels.

Fill in the blank: ________ are anything people can use that comes from nature.

Fill in the blank: ________ are a mixture of hydrocarbons that formed over millions of years from the remains of dead organisms.

Fill in the blank: ________ is the work done by an electrical circuit.

Fill in the blank: ________ is the process where energy in sunlight is changed to stored chemical energy in food.

Energy resources are some of the most important natural resources because everything we do requires energy.

Fossil fuels provide most of the energy used in the world today.

The burning of fossil fuels also releases many pollutants into the air.

Natural gas releases the least pollution; coal releases the most.

Nuclear energy is a nonrenewable resource.

Nuclear energy doesn’t produce air pollution or carbon dioxide that contributes to global climate change.

Fill in the blank: ________ are any natural resource that exists in limitless amounts or can be remade or recycled quickly enough to keep up with human use.

Fill in the blank: ________ is the mechanical energy of rapidly flowing water that can turn a turbine and generate electricity.

Fill in the blank: ________ is the stored chemical energy in organic matter or wastes.

Fill in the blank: ________ is thermal ("heat") energy from below Earth's surface. It can be used to heat homes or generate electricity.

In addition to wind, renewable energy resources include sunlight, moving water, biomass, and geothermal energy.

The sunlight that reaches Earth is the planet’s most important source of energy.

Burning biomass releases air pollution and contributes to global climate change.