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PS 1 - Scientific Inquiry
PS 2 - 3rd Period Brown
PS 2 - 4th Period Brown
PS 2 - 5th Period Brown
PS 2 - 6th Period Brown
PS 2 - Structure and Properties of Atoms
PS 3 - 3rd Period Brown
PS 3 - 4th Period Brown
PS 3 - 5th period Brown
PS 3 - 6th Period Brown
PS 3 - Properties and Classification of Matter
PS 3 - Tony
PS 4 - 3rd Period Brown
PS 4 - 4th Period Brown
PS 4 - 4th Period Joe
PS 4 - 5th Period Brown
PS 4 - 6th Period Brown
PS 4 -Chemical Reactions and Compounds
PS 5 - 3rd Period Brown
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PS 3 - 6th Period Brown
physical properties distinguished
substance- element or compound that cannot be broken down into simpler components and maintain the properties of the original substance.
element- substance with atoms that are all alike.
compound- substance formed from two or more elements in which the exact combination and proportion of element of elements in which the exact combination and proportion of elements is always the same.
mixture- is a material made up of two or more substance that cam be easily seperated by physical means.
heterogenous- a mixture in which different materials can be distinguished easily.
homogenous- contains two or more gaseous, liquid, or solid substances blended evenly throughout.
colloid- is a type of mixture with particles that are larger than those in solutions but not heavy enough to settle out.
suspension- heterogenous mixture containing a liquid in which visible particle settle.
physical property- any characteristic of a material, such as size or shape, that you can observe or attempt to observe without changing the identity of the material.
chemical prperty- any characteristic of a substance, such flammability, that indicates whether it can undergo a certain chemical change.
chemical change- change of one substance into a new substance.
rust- when iron combines with oxygen to form it and the reaction taken place slowly.
Law of conservaition of mass- states that the mass of all substance present before a chemiscal change equal the mass of all the substances remaining after the change.
kinetic theory- is an explanaiton of how pariecles immatter behave.
solids- are particles that are closely packed together.
liqiuds- the particles are moving more freely, and can slip out of the ordered arrangement.
gases- the qaricles are far apart and spread out to fill empty spots
plasma- is matter consisting of paritvely and negatively changed qarticles.
distrabution of particles- solids are very close together and have low energy. Liquids are medium far apart and have low energy. Gas is very sqread out and has high energy. Plasma has very high energy.
Kinetic energy- energy moving object has because of its motion, depends on the mass and sqee of the object.
Boiling point- the temperature at which the pressure of vapor in the liquid is epual to the external qressure acting on the surface of the liquid.
All phase changes are?
When a water changes to steam the energy?
The energy speeds up
The energy slows down
The energy stays the same
Which of the following is an example of a physical change?
Formation of silver sulfide when silver reacts with sulfur in the air
Burning of methane gas, producing water and carbon dioxide
Condensation of water vapor on the outside of a cold can of soda
Vinegar and baking soda combining and forming a salt and water
When copper reacts with oxygen in the air, a color change takes place and the copper becomes green.
This green color is called patina.
What type of chemical change occurs to produce patina?
3. What is a physical combination of two or more substances called?
a. an element
b. a compound
c. a mixture
4. Which of the following is a heterogeneous mixture?
a. salt water
b. carbon dioxide
5. The kinetic energy of a substance is greatest in which state?
6. What state of matter can expand or contract depending on the volume of its container?
d. b and c
7. What state of matter has a definite volume but no definite shape?
8. Which of the following states of matter would be least likely to respond to a change in pressure?
d. All of these will respond to a change in pressure
9. What phase change occurs when a solid changes to a gas?
10. Which state of matter is characterized by particles that take the shape and fill the volume of the container in which they are placed?
11. Which of the following is evidence that a chemical change has taken place?
b. change from a solid to a liquid
c. breaking into many small pieces
d. drawing into a thin wire
12. What is the most common state of matter in the universe?
13. Everything on Earth can be explained in terms of
a. solid, liquid, gas, and plasma
b. thermal energy
14. The ___ of a quantity of liquid is fixed by its temperature and pressure.
15. What is NOT an example of suspension?
a. mud in water
b. dust in the air
c. Milk of Magnesia
d. notebook paper
Flour in water is an example of suspension
Examples of colloids
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