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Chemical Vs Physical Changes
Test Description: Chemical vs Physical Changes
Instructions: Answer all questions to get your test result.
1) Dissolving salt in water is a ______________
A
None of the above
B
Chemical Change
C
Physical Change
2) A straight piece of wire is coiled to form a spring. What type of change?
A
*
B
Physical Change
C
None of the above
D
Chemical Change
3) Chewing food to break it down into smaller particles represents a _________ change, but the changing of starch into sugars by enzymes in the digestive system represents a ___________change.
A
none of the above
B
physical, chemical
C
*
D
chemical, physical
4) In a fireworks show, the fireworks explode giving off heat and light. What type of change?
A
None of the above
B
*
C
Chemical Change
D
Physical Change
5) True or False. Changing the size and shapes of pieces of wood would be a chemical change.
A
*
B
*
C
False
D
True
6) True or False. When ice cream melts, a chemical change occurs.
A
*
B
True
C
False
D
*
7) Liquid water particles boiling and turning into a gas (water vapor). Physical or Chemical?
A
*
B
Physical
C
Chemical
D
None of the above
8) You blow dry your wet hair. What type of change?
A
Chemical change
B
*
C
*
D
Physical change
9) You forgot to dry the bread knife when you washed it and reddish brown spots appeared on it. (Rust)
A
Chemical Change
B
Physical change
C
*
D
*
10) _______________ changes happen when atomic bonds are broken or created during chemical reactions.
A
Chemical
B
Physical
C
No
D
None of the above
11) You step on a soda can and crush it. Why is this a physical change?
A
the molecules in the can are still the same
B
you only changed the shape of the can
C
all of the above
D
no chemical bonds were created or destroyed
12) Which of the following is evidence of a chemical change?
A
Bubbles
B
Heat forming
C
Color change
D
all of the above
13) baking soda + vinegar → gas + white solid Which of the following is a reactant in the equation?
A
Gas
B
baking soda
C
none of the above
D
white solid
14) Which of the following is NOT a chemical change?
A
antacid that neutralizes stomach acid
B
salt being mixed with water
C
juice the ferments
D
silver tarnishing in open air
15) Scientists study the characteristics of substances to better understand the natural world. Which of the following is not a chemical or physical characteristic of a substance?
A
odor
B
cost
C
color
D
density
16) What kind of chemical change might be observed in cars driven in coastal areas or in areas that use salt to treat icy roads?
A
precipitation
B
dents and dings
C
formation of salt crystals
D
corrosion
17) Which of the following is an example of a chemical change?
A
the addition of food coloring to a glass of water
B
defrosting food in a microwave oven
C
wood burning in a fireplace
D
ice melting in a glass
18) In a chemical equations, the compounds or elements on the left side of the arrow are called the _________________________.
A
Products
B
Reactants
C
Result
D
Sum
19) Which of the following is a physical change?
A
Baking a Cake
B
burning wood
C
MIxing Cookie Dough
D
Frying Eggs
20) Which of the following is NOT a physical change?
A
breaking an egg
B
nailing together boards of wood
C
adding food coloring to water
D
dying your hair
*select an answer for all questions
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