Unit 4 Changing Matter Test Review
Interactive Video
•
Science
•
8th Grade
•
Practice Problem
•
Medium
+5
Standards-aligned
David Burdrick
Used 15+ times
FREE Resource
Standards-aligned
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Researchers studied a typical hardwood forest containing a variety of trees, other plant species, fungi, and animals. The atmospheric carbon dioxide concentrations around the forest were measured in the middle of the day. The carbon dioxide concentration was lowest right next to the forest and steadily increased as the researcher measured farther away from the forest. Explain how this observation supports the Law of Conservation of Mass.
The carbon released by animals through cellular respiration is used by the trees to create food necessary for growth and maintenance
The carbon released in the atmosphere by decaying organic matter increases as you move further away from the forest
The carbon released by plants through photosynthesis is quickly cycled through the cellular respiration of animals
The amount of carbon burned by fossil fuels decreases further away from the forest
Tags
NGSS.MS-LS1-6
NGSS.MS-LS2-3
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A chemical reaction is taking place in a sealed container. What will happen to the mass of the materials in this sealed container?
The mass will increase
The mass will decrease
The mass will stay the same
It will depend on which chemical reaction occurs
Tags
NGSS.MS-PS1-5
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Suppose a candle is burned in a closed system where matter cannot enter or leave. Given this situation, what is equal to the mass of the original candle?
The mass of the burned candle
The mass of all gases in the closed system
The mass of all gases released while the candle is burned
The mass of the burned candle plus the mass of the gases released while the candle is burned
Tags
NGSS.MS-PS1-5
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Shanti mixes 39 g of potassium with 39 g of chlorine. She obtains 74 g of potassium chloride and recovers 4 g of unreacted chlorine. Do Shanti’s result confirm the law of conservation of mass?
No, because no potassium is left over
Yes, because all of the potassium reacted with the chlorine
Yes, because the mass of all the reactants is accounted for
No, because the mass of the potassium chloride is greater than the amount of potassium used
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
When paper is burned, the mass of the remaining ash is less than the mass of the original paper. Which statement best describes this result?
The ash is denser than the paper
Some of the mass is lost as it escapes in smoke
The mass of the ash cannot be accurately determined
Some of the paper’s matter is destroyed during the reaction
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
A chemical change of matter takes place when one or more substances change into entirely new substances with different properties. Although physical changes affect the appearance of a substance, chemical changes affect its composition. Which process is an example of a chemical change?
Bath water cooling while you take a bath
Dough rising while bread bakes in the oven
A piece of metal being heated until it expands
A glass window breaking when hit with a baseball
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Austin is given a mixture of iron filings, sand, and salt. To separate the mixture, Austin uses a magnet, boiling water, and a filter. Which statement is TRUE about the process Austin uses to separate this mixture?
Austin uses only physical changes to separate the mixture’s components
Austin uses only chemical changes to separate the mixture’s components
Austin uses both physical and chemical changes to separate the mixture’s components
Austin uses neither physical nor chemical changes to separate the mixture’s components
Access all questions and much more by creating a free account
Create resources
Host any resource
Get auto-graded reports
Continue with Google
Continue with Email
Continue with Microsoft
or continue with
%20(1).png)
Apple
Others
By signing up, you agree to our Terms of Service & Privacy Policy
Already have an account?
