Why do ice cubes float? (Hint: think about the video from week 3)
It's density is less than water
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lifesaver
Give 25 points!
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seesaw
Swap points!
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shark
Other team loses 25 points!
Okay!
baam
Lose 10 points!
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10
What does boil mean?
to change from a liquid to a gas at a certain temperature that causes bubbles
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10
What is a mixture?
different kinds of matter mixed together, that can be separated again
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10
What is a solution?
a mixture in which one or more kinds of matter are mixed evenly in another kind of matter and is normally dissolved in a liquidÂ
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15
What is the difference between a solution and mixture?
In a mixture, substances are generally just mixed and are not completely dissolved. In a solution, substances are dissolved completely and they cannot be filter
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15
What is a chemical change?
a change that causes different kinds of matter to form, you can not go back to the original object
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10
What does it mean to evaporate something?
to change from a liquid to a gas
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15
In a beaker, I mix together yeast, hydrogen peroxide, water, food coloring, and dish soap. Out comes a foamy substance and my beaker becomes hot! What is this an example of?
a chemical change
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15
What is a physical change?
a change in the way matter looks, you can go back to the original object and no new substance is formed
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seesaw
Swap points!
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rocket
Go to first place!
Okay!
fairy
Take points!
5
10
15
20
25
baam
Lose 25 points!
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lifesaver
Give 20 points!
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rocket
Go to first place!
Okay!
shark
Other team loses 10 points!
Okay!
thief
Give points!
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25
10
What does it mean to freeze something?
to change form a liquid to a solid
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15
My teacher cuts a piece of paper and says that this is a chemical change! Is the teacher correct?
No, this is a physical change!
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10
What does condense mean?
to change from a gas to a liquid
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15
Explain how matter can change into three different states? (Hint: use your vocabulary words)
Solids can melt to turn to liquids, liquids can evaporate to turn into gas, and gas can condense to turn into liquid, Liquids can freeze to turn into solids