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Unit 4 Review: Elements/Compounds And Physical/Chemical Properties And Changes
Test Description: Review of elements and compounds and physical and chemical changes and properties.
Instructions: Answer all questions to get your test result.
1) Add vinegar to baking soda, and it begins to bubble. This is evidence that --
A
a physical change is happening
B
vinegar is an element that is being broken down
C
baking soda is a compound and cannot be broken down
D
a chemical change is happening and a new substance is being formed.
2) A precipitate (solid formed by mixing two liquids) is formed during a--
A
chemical change which formed a new substance.
B
chemical change in which a new substance was not formed.
C
physical change in which a new substance was not formed.
D
physical change which formed a new substance.
3) Which of the following is an example of what might occur during a chemical change?
A
melting
B
bubbling
C
dissolving
D
breaking
4) Blowing bubbles into your milk through a straw causes a ____________________ change.
A
physical
B
organic
C
chemical
D
elemental
5) Bubbles formed as a result of mixing two chemicals is an example of _________________change.
A
physical
B
elemental
C
chemical
D
organic
6) A precipitate, a type of chemical change, is a solid formed by mixing--
A
a liquid and a solid.
B
a solid and a liquid.
C
two liquids.
D
two solids.
7) A compound can have different physical and chemical properties than the elements that make it up.
A
true
B
false
8) Which of the following is an element?
A
Ca
B
CuCO3
C
CO
D
H2O
9) Which of the following is a compound?
A
H2
B
Hydrogen
C
H2O
D
Ca
10) Which of the following is evidence of a physical change?
A
light
B
heat
C
sound
D
breaking
11) An element --
A
can be broken down into a simpler form.
B
is the same as a compound.
C
cannot be broken down into a simpler form.
D
is made of two or more atoms.
12) How many elements are in CuCO3?
A
4
B
3
C
2
D
1
13) A compound --
A
can be broken down into a simpler form.
B
cannot be broken down to a simpler form.
C
is made of one element.
D
is the same as an element.
14) H-O-H --
A
is made of 3 elements (hydrogen, oxygen, and hydrogen) and is an element.
B
is made of 2 elements (hydrogen and oxygen) and is a compound.
C
is made of 3 elements (hydrogen, oxygen, and hydrogen) and is a compound.
D
is made of 2 elements (hydrogen and oxygen) and is an element.
15) All of the following are chemical reactions EXCEPT--
A
dissolving.
B
baking cupcakes.
C
burning a log.
D
iron rusting.
16) All of the following are physical changes EXCEPT--
A
boiling.
B
freezing.
C
breaking.
D
frying an egg.
*select an answer for all questions
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