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15
×
What is a concentrated solution?
A gas mixed in a liquid
A solution with a lot of solute
A frozen solution
One with no solute
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15
×
What makes each element unique?
Its temperature
Its atomic structure
Its color
Its weight
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15
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In the word equation "Iron + Sulfur → Iron sulfide", what are the reactants?
Iron and sulfur
Oxygen
Magnesium
Iron sulfide
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boom
Lose 50 points!
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star
Double points!
Okay!
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gift
Win 25 points!
Okay!
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banana
Go to last place!
Oops!
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thief
Give points!
5
10
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20
25
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magnet
Take 25 points!
Okay!
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rocket
Go to first place!
Okay!
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lifesaver
Give 20 points!
Oops!
15
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What happens to the sugar particles in a sugar solution?
They float to the top
They turn into gas
They spread evenly in the water
They change color
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15
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Why is iron still magnetic in an iron and sulfur mixture?
No chemical reaction has occurred
It lost its electrons
Sulfur enhances magnetism
It turned into a compound
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15
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Which substance forms when iron reacts with sulfur?
Iron sulfide
Magnesium sulfide
Sulfuric acid
Iron oxide
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15
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Why does sugar seem to disappear in water?
It forms bubbles
It turns into steam
The particles are too small to see
It reacts with air
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15
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Which of these is a common solvent in solutions?
Water
Oil
Sugar
Salt
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15
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What does a saturated solution mean?
It only contains gas
The solute is missing
It’s unsafe to drink
No more solute can dissolve
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lifesaver
Give 25 points!
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rocket
Go to first place!
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fairy
Take points!
5
10
15
20
25
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banana
Go to last place!
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15
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What makes a solution different from a mixture?
The solute spreads out evenly
You can see each part
It's a compound
It’s always a solid
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15
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X-ray fluorescence helps scientists:
Detect hidden objects
Identify elements in materials
Measure radiation
Predict chemical reactions
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15
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The process of elements combining chemically is called:
Mixing
Evaporation
Compound formation
Dissolving
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15
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An element cannot be:
Seen under a microscope
Heated
Measured
Broken down by ordinary means
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