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Science
6th -
8thgrade
7-100 IQWST - How Can I Make New Stuff From Old Stuff?: Beginning / End Test
15 questions
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- 1. Multiple Choice
A scientist has two containers. Inside each container is a blue liquid. The liquids are substances. What can the scientist do to help find out whether these two liquids are both the same substance?
(Scientific Principal #1)
Measure the density of the two liquids and compare the densities.
Weigh each liquid and compare the weights.
Measure the volume of each liquid and compare the volumes.
Measure the temperature of each liquid and compare the temperatures.
- 2. Multiple Choice
Which one of the following is a substance?
(Scientific Principle #2)
- 3. Multiple Choice
Which one of the following cereals is NOT a mixture?
(Scientific Principle #3)
- 4. Multiple Choice
Soda contains a large amount of sugar. Why can't it be seen in the liquid?
(Scientific Principle #4)
The sugar has a chemical reaction with the soda.
The sugar dissolves in the soda.
The sugar is taken out of the soda.
The sugar was invisible before it was added to the soda.
- 5. Multiple Choice
You find a clear gem that is made of one substance. What could you do to identify whether the gem is a diamond?
(Scientific Principle #5)
Measure its length and compare it to the length of other gems, including diamonds.
Determine its shape and compare it to the shape of other gems, including diamonds.
Determine its melting point and compare it to the melting point of other gems, including diamonds.
Measure its mass and compare it to the mass of other gems, including diamonds.
- 6. Multiple Choice
Which one of the following characteristics will not help you tell whether two solids are the same or different substances?
(Scientific Principle #6)
Color
Hardness
Shape
Melting Point
- 7. Multiple Choice
Which is the least dense material?
(Scientific Principle #7)
grape
syrup
oil
cork
- 8. Multiple Choice
Which one of the following is a chemical reaction?
(Scientific Principle #8)
New atoms are formed when substances are mixed together
A solid material melts and becomes a liquid
Atoms of the reactants rearrange to form a new substance
- 9. Multiple Choice
Which one change will produce a new substance?
(Scientific Principle #9)
dissolving cocoa mix in water
burning a piece of bread in a toaster
heating water until it evaporates
cooling water until if freezes
- 10. Multiple Choice
aluminum + copper chloride ---> copper + aluminum chloride
Name the reactant(s) in the reaction.
(Scientific Principle #11)
Copper
copper chloride
Aluminum + copper chloride
copper + aluminum chloride
- 11. Multiple Choice
aluminum + copper chloride ----> copper + aluminum chloride
Name the product(s) in the reaction.
(Scientific Principle #10)
Copper + aluminum chloride
Copper
aluminum chloride
copper chloride
- 12. Multiple Choice
Rusting on a car is an example of...
(Scientific Principle #12)
melting
a mixture
a phase change
a chemical reaction
- 13. Multiple Choice
A puddle that dries up in the street is an example of which of the following?
(Scientific Principle #13)
a chemical reaction
a physical change
dissolving
- 14. Multiple Choice
Unlike a chemical reaction, the parts of a mixture...
(Scientific Principle #14)
can be separated.
can not be separated.
change into new substances
are the same.
- 15. Multiple Choice
Ari dissolves 1 gram of sugar in 10 grams of water. What will be the mass of the dissolved sugar and water?
(Scientific Principle #15)
less than 11 grams
more than 11 grams
11 grams
It is not possible to tell from the data
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