States Of Matter
Properties Of Matter
Mixtures & Solutions
Physical & Chemical Changes
Pictures
1000
Name the three states of matter.
Solids
Liquids
Gases
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Mass is never ____________, it just changes ________________.
Mass is never lost, it just changes form.
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Give three examples of mixtures.
Answers will vary.
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Give three examples of a chemical change.
Answers will vary
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Physical Change, Chemical Change, or Both?
Both:
The wick burning is a chemical change, but the wax melting is a physical change.
2000
Why does an ice cube melt at room temperature?
The temperature of the ice increases.
2000
Explain the difference between weight and mass on the moon.
If you go to the moon, your weight will change because the pull of gravity also changes. Your mass will remain the same.
2000
What is it called when one substance completely dissolves in another substance?
A solution
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Describe the difference between a physical change and a chemical change.
In a physical change, the chemical properties of a substance do not change and it can be returned to its original state. In a chemical change, the chemical properties of a substance changes and it can not be reversed.
2000
Describe the type of matter seen in this picture:
This matter is a solid form of water.
3000
At an object’s boiling point, a ___________ changes to a ____________
At an object’s freezing point, a ___________ changes to a ____________
Plug these words in: Solid, Liquid, or Gas
At an object’s boiling point, a liquid changes to a gas.
At an object’s freezing point, a liquid changes to a solid.
3000
Your science teacher crushes a can of soda.
What has changed about the can?
A) Its shape
B) Its mass
c) Its weight
D) Its shape and weight
A) Its shape
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Why is a solution like saltwater considered a physical change and not a chemical change?
The chemical properties of the salt and the water do not change when they are mixed together. The solution can also be separated.
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Name three clues that point to the fact that a chemical change has occurred.
Change in color
Change in texture
Bubbles and gas are released
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Describe the two types of matter seen in this picture:
The balloons are a solid form of matter, and the helium inside is a gas.
4000
Explain how matter moves from a solid, to a liquid, to a gas.
In order to move from a solid to a liquid, the temperature of matter needs to increase. To move from a liquid to a gas, the temperature needs to increase even more. This causes the particles to move faster.
4000
Name two ways to measure volume.
Length x Width x Height
Water Displacement
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Describe how to separate a solution of Kool-Aid and water.
You can boil the solution. When the water evaporates, the Kool-Aid crystals will be left behind.
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Describe how you can cause both a physical change and a chemical change to this sandwich:
Physical Change: you can remove parts of the sandwich that you do not like to eat.
Chemical Change: you can toast the sandwich
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Describe a physical change in this picture.
The physical change is the graham crackers mixed with the marshmallow.
5000
Explain how condensation occurs.
When the temperature drops (like on a glass with ice), gas particles in the air slow down and turn back into a liquid.
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Using your knowledge of density, explain the following picture:
In this picture, the lamp oil has fewer particles than the rubbing alcohol; therefore, it floats because it has less density. The honey is the most dense liquid; therefore, it is on the bottom.
5000
Describe the steps that you would take to separate a mixture of:
Water
Salt
Iron filings
Rocks
Sand
Pick out the rocks with your hand
Use a magnet to take out the iron filings
Use a filter to remove the sand
Boil the water in order to turn it into a gas
The salt will be left behind
5000
Explain why dying your hair is a chemical change and not a physical change.
When you dye your hair, you are using chemicals to alter the color of your hair. The only way to reverse it is to allow your hair to grow back.
5000
Describe a chemical change in this picture and the sign that shows it is a chemical change.
The chemical change in this picture is the burnt marshmallow. That is a new type of matter.