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15
×
Based on the law of _____________, during physical and chemical changes, mass is not changed.
conservation of mass
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15
×
Which method can be used to separate a mixture of iron fillings, sand and sugar?
magnet, dissolve sugar in water, filtration, evaporation
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15
×
______ is the change from a gas directly to a solid.
Deposition
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seesaw
Swap points!
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magnet
Take 5 points!
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gift
Win 10 points!
Okay!
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baam
Lose 10 points!
Oops!
15
×
The amount of matter in an object is called the _______.
mass
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15
×
What happens to the motion of particles when you remove thermal energy?
The particles will move more slowly.
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10
×
________ ________ is the temperature at which a solid turns to liquid.
Melting point
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15
×
The number of __________ in an atom determines the identity of the element.
protons
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10
×
What kind of mixture is the air in Hanoi?
heterogeneous mixture
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15
×
The type of substance with atoms of two or more different elements chemically bonded together is called a(n) __________.
compound
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5
×
A matter's temperature will stay the same during a change of state. (True or False)
True
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banana
Go to last place!
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rocket
Go to first place!
Okay!
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shark
Other team loses 15 points!
Okay!
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baam
Lose 20 points!
Oops!
15
×
Balance this equation.
1,2,1,2
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15
×
List three factors that affect the rate of a chemical reaction.
Temperature, concentration, surface area, pressure, catalyst
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thief
Give points!
5
10
15
20
25
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seesaw
Swap points!
Okay!
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shark
Other team loses 25 points!
Okay!
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thief
Give points!
5
10
15
20
25
10
×
New substances formed during a chemical reaction are called _________.
products
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