States of Matter
What are all molecules always in a constant state of?
Motion
What type of change is a melted popsicle?
Physical Change
The smallest, most basic, unit of an element that stands alone.
Atom
Matter cannot be ___________ or _______________.
created or destroyed
Insulation is a kind of heat transfer.
False
When heat is added to a liquid and becomes a gas.
Evaporation
Type of change where a new substance is created.
Chemical Change
The negatively charged particle found in an atom.
Electron
50 grams of magnesium reacts with oxygen. How many grams of manesium will be present after the reaction occurs.
50 grams
That type of heat transfer is roasting marshmallows on an open fire?
Radiation
As a solid turns to a liquid, what happens to the thermal energy?
Increases
Alka-Seltzer in water is example of what type of change? How?
Chemical, because gas (CO2) bubbles form.
Two or more atoms bonded together.
Molecule
You cannot add or remove atoms from a chemical reaction, you can only ______________ them.
Rearrange
An object that allows heat to move through it easily.
Conductor
What happens when an object's kinetic energy increases?
The particles move faster
Name two indicators of a chemical change.
Color Change, Gas Bubbles, Temperature Change, Light Emission, Odor, Forming Precipitate (Solid), Formation of a New Substance
Matter is anythin that has ___________ and __________.
What do the reactants and products of a chemical reaction have in common?
They have the same amount of matter
Movement from one place to another.
Transfer
What must happen for matter to change states?
It must gain/lose energy
Explain how water could be an example of physical change.
Solid - Liquid: freezing & melting
Solid - Gas: sublimation & deposition
Liquid - Gas: condensation & evaporation
Where are atoms located?
In matter or all around us
What is a chemical equation that has the same number of atoms in the products and reactants?
Balanced
The basement of a school being colder than the third floor is an example of what?
Convection