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Describing Matter
Test Description: Describing physical and chemical changes, physical and chemical properties and chemical reactions.
Instructions: Answer all questions to get your test result.
1) Melting ice is an example of a(n)
A
ionic bond
B
physical change
C
release of covalent molecules
D
chemical change
2) You calculate the density of pure water to be 1 g/ml. You have just found
A
a physical property of water
B
the number of valence electrons in water
C
the kinetic energy of the molecules of water
D
a chemical property of water
3) You put a beaker of ice on a hot plate and turn it on high. For 5 minutes the temperature of the ice remains the same. Why ?
A
The energy going into the beaker is being used to separate the molecules of water.
B
The thermometer is broken.
C
The energy going into the beaker is being used to increase the speed of the molecules if water,
D
The hot plate is not working properly.
4) When you add energy to a substance, what two things can occur to the molecules of the substance?
A
They can either speed up or move farther apart.
B
They can either increase in number or change phase.
C
They can either break apart or form new compounds.
D
They can either slow down or move closer together.
5) In the chemical equation Na + Cl - NaCl, what is (are) the reactant(s)?
A
Both Na and Cl
B
NaCl
C
Na
D
Cl
6) In the chemical equation Na + Cl - NaCl, what is (are) the product(s)?
A
Cl
B
Both Na and Cl
C
Na
D
NaCl
7) Matter is anything that has
A
mass and volume
B
mass and weight
C
energy
D
None of these are correct
8) The study of matter and how matter changes is called
A
Chemistry
B
Biology
C
Geology
D
Physics
9) Which below is a chemical property?
A
The freezing temperature of water is 0 degrees Celsius.
B
Wood can burn.
C
Paper is white.
D
Ice is a solid.
10) Which below is a physical property.
A
Baking soda will react with vinegar.
B
Iron can rust.
C
The boiling point of water is 100 degrees Celsius.
D
Wood can rot.
11) When you combine two substances chemically and create a new substance, you have created a(n)
A
element
B
solution
C
compound
D
mixture
12) What is the difference between a compound and a mixture.
A
A compound can only be separated chemically while a mixture can be separated physically.
B
A mixture is physically combined while a compound is chemically combined.
C
All of these.
D
In a compound, the substances have to be in a set ratio, while in a mixture they do not.
13) A mixture in which you can see the individual particles is a(n)
A
heterogeneous mixture
B
homogeneous mixture
C
compound
D
solution
14) Salt is made of sodium, an explosive solid, and chlorine a poisonus gas. Why can we eat salt?
A
Because the properties of a compound are different from the properties of the substances which they are made of.
B
Because the sodium can cancel out the effects of the chlorine.
C
Because they are a mixture, and mixtures can't hurt you.
D
Because our bodies can change the substances.
15) Is the chemical equation on the board balanced?
A
No, there are 2 hydrogen atoms on the product side and only 1 on the product side.
B
No, there are 2 oxygen atoms on the reactant side and only 1 on the product side.
C
Yes, it is balanced.
D
No, there are 2 hydrogen atoms on the reactants side and 4 on the product side.
16) In the chemical equation Na + Cl - NaCl, if I have 10 grams of Na and 20 grams of Cl, how much NaCl should I have?
A
15 grams
B
10 grams
C
None, they will cancel each other out.
D
30 grams
17) A single kind of matter that always has a specific makeup and a specific set of properties.
A
pure substance
B
heterogeneous mixture
C
homogeneous mixture
D
solution
18) A pure substance made of two or more elements chemically combined in a set ratio.
A
element
B
mixture
C
solution
D
compound
19) A characteristic of a substance which can be observed without changing it into another substance.
A
physical property
B
relative property
C
chemical property
D
solution
20) A characteristic of a pure substance that describes its ability to change into different substances.
A
relative property
B
physical property
C
solution
D
chemical property
*select an answer for all questions
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