WorksheetsGeneral Chemistry Review
Total questions: 40
Worksheet time: 26mins
Saltwater Evaporating
Physical Change
Chemical Change
Ice Melting
Physical Change
Chemical Change
Glass Breaking
Physical Change
Chemical Change
Whipping Eggs
Physical Change
Chemical Change
Melting Butter
Physical Change
Chemical Change
Sour Milk
Physical Change
Chemical Change
Rusted Tack
Physical Change
Chemical Change
Plants Decaying
Physical Change
Chemical Change
Apple Turning Brown
Physical Change
Chemical Change
Cooking Eggs
Physical Change
Chemical Change
Toast Turning Brown
Physical Change
Chemical Change
Dying Hair with Purple Permanent Haircolor
Physical Change
Chemical Change
If a door was left open between the bedroom (74 degrees) and the living room (68 degrees), what would likely happen to the temperatures after several hours?
both rooms would become hotter
both room would become colder
the bedroom temp. would lower and the living room temp. would rise
nothing - the temperatures would stay the same
After holding an ice pack against his skin for 20 minutes, the man notices the ice pack is melting. Why is this happening?
exothermic - heat is leaving the ice pack via conduction(direct contact)
endothermic - heat is entering the ice pack via conduction(direct contact)
Hot things have ____________ thermal energy than cold things
more
less
same
potato
As temperature increases, molecules _____________
move slower
move the same
move faster
stop moving
When thermal energy is added to molecules,...
the molecules get bigger.
the molecules move father apart from one another.
the number of molecules increases.
the heat of the molecules increases.
How many different types of molecules are pictured?
2
3
4
8
What type of substance is pictured?
element
compound
mixture
solution
What type of substance is pictured?
element
compound
mixture
solution
Which is a mixture of compounds?
Which is a pure substance?
Four students performed four different investigations by combining different substances. Which of the observations is MOST likely a chemical reaction?
investigation 1
investigation 2
investigation 3
investigation 4
Changes the form or appearance of a substance. Does not change the substance into anything new.
Chemical Change
Physical Change
During a lab experiment, a scientist numbers three beakers.
Next, she pours 150 mL of liquid into each beaker. Each liquid is different.
Then, the scientist adds 5 g of white solid baking soda (NaHCO3) to each beaker and stirs. She observes the results.
In which of the beakers does the scientist observe clear evidence of a chemical reaction?
beaker 1 only
beaker 2 only
beaker 3 only
beakers 1,2, and 3
Select ALL of the following that are indicators of a chemical reaction.
the production of heat or light
a color change
the production of gas bubbles
the dissolving of one substance in another
Which of the following process is exothermic?
Water freezing to form ice
A puddle evaporating
Which compounds are the PRODUCTS of this reaction?
CO2 + H2O
C6H12O6 + O2
C6H12O6 + CO2
H2O + O2
