Solids, Liquids, Gases
Physical/Chemical Changes
Mixtures, Compounds, etc.
Elements and Periodic Table
Miscellaneous
100
A kind of matter that keeps its shape and volume
A solid
100
Results in a new substance being formed
Chemical change
100
The parts of a mixture (cannot be seperated, are easily seperated, have new properties after they are mixed)
Are easily seperated
100
An atom (makes up elements, is made up of a compound, is the largest piece of matter)
Makes up elements
100
_______keep their shape and volume, ______do not keep their shape and volume, and ______keep their volume but take the shape of their container.
Solids, gases, liquids
200
Explain how the particles in a gas are arranged.
Can spread far apart, not tightly packed
200
Give an example of a chemical change and why it would be considered a chemical change.
Examples: Burning wood, fizzing, gas being released, rusting. Creates new substance.
200
Has different properties from the elements it is made of
A compound
200
The force that holds atoms together
Chemical bond
200
Why do scientists use a model to study atoms?
Atoms are so small
300
When the particles in a gas lose thermal energy, they move (faster, slower, same speed)
Slower
300
Explain what a physical change is and give an example.
A change that involves a change in physical properties that does not change the substance or chemical composition of that substance. Examples: Changes of state, bending, folding, color change
300
A mixture in which the separate parts are very evenly mixed together is called a_____
Solution
300
Which particles are found in the nucleus of an atom?
Protons and Neutrons
300
The direct change from a solid to a gas is called______
Sublimation
400
We use this term to define a phase transition from the liquid phase to gas phase
Vaporization. Example?
400
Every chemical or physical change in matter includes a change in _____
Energy
400
Saltwater is a (Mixture, Compound, Element). Why?
Mixture (Also a homogeneous mixture and solution)- Salt and water can still be seperated by evaporation or boiling. A compound cannot be easily seperated like this. Has same concentration throughout.
400
______ in an atom have a positive charge, _______ in an atom have a negative charge, and ______ in an atom have no charge.
Protons, Electrons, Neutrons
400
Explain how to calculate the Density of an object.
Density= Mass divided by Volume.
500
At high pressure, gas particles push against the walls of the container (hard and often, very gently, rarely)
Hard and often
500
Explain the Law of Conservation of Mass and give an example.
States that mass is neither created or destroyed in chemical and physical changes. Examples: Cutting a piece of paper (mass is still the same), burning a piece of wood (mass of wood = mass of ashes + water vapor, heat, other gases)
500
Elements of the same group in the periodic table have properties that are ______.
The same.
500
The number of protons in an atom is the element’s______
Atomic Number
500
The dimensions of a brick are 10cm, 5cm, and 2cm. It has a mass of 800g. What is it's density? (Show correct units!)
Density=8g/cm3. (Volume=10cmx5cmx2cm=100cm3. Density=Mass/volume, so 800g/100cm3=8g/cm3)
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