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Phases of Matter
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The point where a liquid becomes a solid is known as its' ______ _____.
freezing point
The point where a liquid evaporates into a gas is known as the _____ ______.
boiling point
The point at which a solid becomes a liquid is called the _____ _____.
melting point
Some ________ properties include: hardness, texture, density, flexibility, color.
physical
A ___________ property describes an element’s ability to change into a new substance.
chemical
A ________ is formed when 2 or more elements are chemically bonded together. (H2O and CO2)
compound
A _________ is the smallest possible part of a compound and often contains atoms of the same element bonded together. (O2 and H2)
molecule
In every _____, the atoms are packed tightly together and vibrate in place.
solid
In __________, the atoms have more energy and move around more than they would in a solid object, but less energy than in a gas.
liquids
In ______, the atoms have SO MUCH ENERGY, that they all travel super fast and are impossible to see.
gasses
When the air gets cooler, water droplets on grass can turn into frost. This is an example of
freezing
One of the most common ways for a phase change to occur is by a change in __________.
temperature
In science, energy refers to the ability to do ____.
work
When the temperature gets really low, gas particles can skip the liquid phase and instantly turn into solid. Snow forms this way in the cloud. This is the phase change called ________.
deposition
In order for a liquid to turn into a gas, ______ (less/more) heat is needed.
more
Heat is a form of _______.
energy
Sometimes, a solid can turn into a gas by skipping the liquid phase. Dry Ice is an example of this process, known as __________.
sublimation
The Sun helps to _________ water and turn into from a liquid to a gas.
evaporate
When the temperature decreases, water vapor (gas) slows down and will turn back into liquid water. What is this phase change?
Condensation
When more heat is added, the particles in a solid move around more. When there is enough heat, the solid will ___ into a liquid
Melt
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