Mass Matters
PC or CC
Obviously?
Name that State
What's this Word?
100
5 grams of orange drink mix is added to 100 grams of water. How much will the solution weigh?
105 grams
100
You leave a candy bar in your car on July 21st and it melts.
PC-Physical Change. It's still a chocolate, and it will even change back into a solid if you cool it down.
100
You mix vinegar with bromophenol blue, and the resulting liquid is yellow. How do you know a chemical change has taken place?
There was an unexpected color change.
100
Your desk
Solid
100
Anything that takes up space and has mass is called ____________.
Matter!
200
A man made of unifix cubes is weighed. He somehow falls apart, and all of his different parts are weighed separately. If the weights of all those parts are added together, what will they equal? A. More than unifix man's original weight B. Less than unifix man's original weight C. The same as unifix man's original weight
C. The same as unifix man's original weight
200
You put some bread in the toaster, and when it comes out it's a perfect golden-brown piece of toast.
CC-Chemical Change. When you make toast, you're burning the bread. Burning always involves a chemical change. Toasting a marshmallow is another delicious example of a chemical change.
200
You put a bar of Ivory soap in the microwave for a few minutes and it got bigger. How do you know this was a physical change and not a chemical reaction?
It's still soap. No new substance was formed, and there was no unexpected change in heat/light, color, or state. (As long as you have one of these answers, you get the points.)
200
The air we breathe
Gas
200
Name three PROPERTIES of snow.
It's cold. It's wet. It's white. It's a solid. Etc. Properties are just words you would use to describe the substance.
300
5 grams of baking soda is added to 20 grams of vinegar. A bubbling reaction starts. When it's over, the solution weighs 24 grams. Why did the weight change?
A gas has formed and left the mixture.
300
Your dad adds a few drops of green food coloring to some white frosting, so that you can use it to frost some shamrock sugar cookies.
PC-Physical Change. It's still frosting. You've just changed its appearance a little bit.
300
You add baking soda to vinegar and it causes it to bubble and fizz. How do you know that this is a chemical reaction?
A new substance, carbon dioxide gas, is produced and released.
300
Matter that has a definite volume and takes the shape of its container
Liquid
300
The measure of how much space something takes up, or how much something can hold is called _____________.
Volume
400
Two pieces of paper were balanced on two sides of a scale. One was taken off, folded into a paper airplane, and placed back on the scale. Though the papers now looked different, the scale was again balanced. What does this prove?
It proves that the weight does not change when an object undergoes a physical change.
400
You haven't ridden your bike in a long time, and when you pull it out the pedals won't go because the chain is all rusted.
CC-Chemical Change. Rust is a new substance that forms over time when you combine water, oxygen, and metal.
400
You burn a piece of wood until all that's left is a pile of ash. How do you know this was a chemical change?
It's irreversible. It produced new substances--smoke and ash.
400
Matter that has a definite volume and a definite shape
Solid
400
The substance that you combine in a chemical reaction can also be called _____________.
Reactants
500
You add 29 grams of salt to some water, and the result weights 129 grams. After a few days, the water has all evaporated, but the salt is still there. How much would you expect the salt to weigh now? A. Less than 29 grams B. 29 grams C. More than 29 grams
B. 29 grams (as long as all of the water has really evaporated)
500
You're painting a beautiful picture and decide that you want the unicorn to be purple, but you don't have any purple paint! To solve the problem, you mix together some of your blue paint with some of your red paint.
PC-Physical Change. Getting purple when you mix red and blue is an expected color change.
500
You combine two liquids, vinegar and milk, and when you look more closely see that the result isn't just another liquid. It's all lumpy. How do you know that this is a chemical change?
It's an unexpected change of state. You'd expect two liquids to make another liquid, not a solid.
500
Matter that has no definite shape and no definite volume.
Gas
500
The amount of matter in an object is called its __________. (This is related to weight.)
Mass
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