Objects made of glass or plastic found in cameras, hand lens and glasses that refract light.

Objects or materials that do not allow any light to go through them. You cannot see anything through these objects or materials.

Objects or materials that allow some light to go through them. You cannot see clearly through these objects or materials.

Objects or materials that allow all the light to go through them. You can see clearly through these objects or materials.

The transfer of heat by direct contact with the heat source.

The transfer of heat by gases or liquids.

The transfer of heat by rays, waves or particles by the sun, fire and other heat sources.

The energy of movement by an object or substance.

The energy that is stored in an object or substance that could be in possible motion.

A form of energy that we can see and that travels in straight line through empty space.

The bouncing back of light rays.

The bending of light rays as they travel from one medium into another type of medium.

A form of energy produced by the vibrations of an object or substance.

A form of energy produced by the movement of charged electrons as they travel from one place to another through conductors.

When a substance is completely and evenly mixed in another substance. The particles become too small to be seen and forms a solution.

A combination of 2 or more substances that do not create something new, can see the individual parts and can be separated easily.

The process that changes water vapor (gas) back into water (liquid) water by taking away heat.

A property of matter that determines whether an object or substance will sink or float in water.

A push or a pull in a certain direction.

The process that changes (liquid) water into water vapor (gas) by adding heat.

When a force is applied to move an object a certain distance.

What you THINK may have ALREADY happened based on observations or evidence.

A prediction about what you THINK is going to happen at the END of an investigation or experiment.

What you THINK is going to happen in the FUTURE.

A closed pathway through which electricity can flow.

An open pathway through which electricity cannot flow.

A measure of how hot or cold an object or substance is.

A form of energy that is produced by the movement of electrons as they move from one place to another through conductors.

Materials that ALLOW electricity to flow through them easily.

A pathway of conductors through which electricity can flow.

Materials that DO NOT ALLOW electricity to flow through them.

A science tool that produces a magnetic field and is used to determine if certain metals are magnetic.

A force of attraction between certain metals like nickel, iron, cobalt or steel (NICs).

An electric circuit that has 2 or more pathways for electricity to flow through. If one bulb does not work, the other bulbs will continue to work.

An electrical circuit that only has 1 pathway for electricity to flow through. If one bulb is not working, the other bulbs will not work either.

A form of energy that involves the movement (kinetic energy) or the possible movement (potential energy) of objects or substances.

The energy produced by the movement of atoms and molecules of objects or substances. The more the atoms or molecules move, the more heat is produced.

A form of energy produced by the movement of electrons.

When two surfaces rub against each other. A force that works against motion.

The ONLY thing that is different or that changes DURING an investigation or experiment.

A force that pulls objects towards each other. A force that pulls all things towards the center of the Earth.

The amount of the force of gravity pulling down on an object or substance. It is measured in Newtons and it can change depending on the size of the planet.

Objects or substances that allow some light to go through.

A form of energy that we can see and that travels in a straight line through empty space.

When light travels straight through an object or substance.

When light is taken in by an object or substance.

The three things that light will do when it strikes and object or substance (RAT).

A form of energy that is produced by the movement of atoms and molecules in an object or substance.

The sum of kinetic energy (movement) and potential energy (possible movement) in an object that is used to do work.

A form of energy that we can see and that travels in a straight line form its source.

A state of matter that has its own shape and volume. Molecules are tightly packed but still vibrate.

A state of matter that does not have its own shape but does have its own volume. Molecules are loosely packed and move around back and forth.

A state of matter that does not have its own shape and does not have its own volume. Molecules move freely and rapidly in all directions as heat is added.

When a solid changes into a liquid with the addition of heat.

When water vapor (gas) changes back into liquid water by taking heat away.

When liquid water changes into water vapor (gas) by adding heat.

When liquid water changes into a solid (ice).

When liquid water changes into a gas by raising the temperature of the water to 100 degrees Celsius.

The amount of matter, stuff, particles or molecules in an object or substance that can be measured by a pan balance or a triple beam balance,

The amount of space that an object or substance takes up.

Objects and situations that are dangerous.

When you use your hands and fingers to find out how something feels.

The ability to do work or the ability to cause a change in matter.