As a matter of fact
Everything that has mass and takes up space.
What is Matter?
Does ice float on water? Why?
It is less dense. Less mass per volume unit.
The unit or scale used to measure temperature based on the state changes of water.
What is Celsius?
When a solid turns into a liquid.
What is melting?
When the temperature of a liquid increases, its particles....
Move farther apart (bonds between particles weaken), move faster.
Expansion is the typical response materials have to....
Heating
How tightly packed together particles are in an object or substance.
or
Mass per unit of volume.
What is Density?
If we melt a cube of ice in a cup, what happens to its mass and volume?
Its mass stays the same. Its volume decreases.
The temperature in Celsius that water melts and freezes at.
What is Zero?
A state of matter that can flow and take the shape of its container.
What is a liquid?
Compared to liquid particles, gas particles....
move faster, and are further apart.
What is contraction?
Particles of a substance moving closer together; volume decreases.
The amount of space something takes up.
What is Volume?
When water changes from liquid to ice (freezing) its volume.....
Increases
The temperature in Celsius at which water boils.
What is 100 C?
A state of matter that has no fixed shape or size and will expand to fill a container.
What is a gas?
When water begins to freeze, its particle bonds become...
Stronger
Why do we put gaps in between sidewalk slabs?
To allow them to expand and contract without being damaged.
Heating matter causes its particles to....
Move faster, and further apart
(Cooling matter causes its particles to move more slowly and closer together).
Which would be more dense; water that is 10 degrees celsius, or water that is 80 degrees celsius? why?
The particles in the 80 degree water would be less dense (more space between their particles). More heat energy causes them to move faster, weaken their bonds, and move further apart.
A measure of how fast particles are moving on average.
What is temperature?
When particles move faster, their bonds or the attractive forces between them...
Weaken
As a gas turns into a liquid, its particle bonds....
Become stronger
When it is hot outside, are roads more likely to expand or contract? Explain what happens to the particles of the road.
Expand. Particles move further apart, the volume of the road increases.
What is the Particle Model of Matter?
All matter is made of small particles that move and have spaces between them.
Describe what happens to water particles as they freeze into ice? Must include 3 things!
The spaces between the particles become larger; the particles slow down; the bonds between the particles strengthen.
Energy that moves from hotter to colder objects or substances.
What is heat?
When particles slow down the bonds or attractive forces between them....
get stronger (and they typically move closer together)
As heat is removed from a liquid, its particles....
slow down, move closer together, form stronger bonds.
On a cold winter day, would a bridge made of concrete, expand or contract? Explain what would happen to the concrete particles?
Contract. The particles would move closer together, move more slowly, and have stronger bonds.