Ch. 3 Chemistry Review
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Transcript of Ch. 3 Chemistry Review
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Ch. 3 Chemistry Review
7th Grade Science
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Question 1
A pure substance made of two or more elements
that are chemically combined.
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Answer 1
Compound
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Question 2
When iced tea mix is combined with water,
this is the solvent.
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Answer 2
water
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Question 3
Choose the correct example of a physical property.(density, flammability,
reactivity)
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Answer 3
Density
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Question 4
How is a mixture different from a compound?
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Answer 4
Each substance in a mixture keeps its chemical properties,
while each substance in a compound form together to create a new substance with
new chemical properties.
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Question 5
A metal dissolved in a metal is known as
_________________. Steel is an example.
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Answer 5
alloy
CO2CO2
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Question 6
A salad would be referred to as a : (solution,
mixture, or compound)
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Answer 6
Mixture
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Question 7
An object that has properties of both
solutions and suspensions is know as a
……….
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Answer 7
Colloid
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Question 8
List two elements.
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Answer 8
118 possible answers…use your periodic table
to ensure you are correct.
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Question 9
Give an example of a solute that can be
dissolved into water.
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Answer 9
Iced tea mix, lemonade mix, salt, sugar, etc.
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Question 10
NaCl is classified as a ________________.
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Answer 10
Compound
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Question 11
What is formed when particles of two or more
substances are distributed evenly among
each other?
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Answer 11
Solution
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Question 12
What are three ways to dissolve a solute more quickly in a solvent?
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Answer 12
Mix it more, crush it, heat the solute.
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Question 13
This compound is used by plants during
photosynthesis.
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Answer 13
CO2
CO2CO2
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Question 14
List one element that is classified as a nonmetal.
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Answer 14
Use your periodic table to check your answer. (You
will need this for the test!)
CO2CO2
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Question 15
A smoothie is a great example of this type of
mixture: _______________.
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Answer 15
suspension
CO2CO2
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Question 16
Sand, Soil, and Dirt are all examples of
________________.
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Answer 16
A mixture of solids.
CO2CO2
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Question 17
What is a pure substance?
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Answer 17
A single element or compound that has definite chemical or physical properties.
CO2CO2
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Question 18
Give an example of a pure substance.
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Answer 18
Any compound or element would be a
correct answer.
CO2CO2
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Question 19
What ways can be used to separate a mixture?
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Answer 19
A magnetA centrifugeDistillation
A Filter
CO2CO2
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Question 20: Is the item shown below:A. ElementB. Compound and MoleculeC. Element and MoleculeD. None of the above
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Answer 20: Element
Explain Why.
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Question 21: Is the item shown below:A. ElementB. Compound and MoleculeC. Element and MoleculeD. None of the above
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Answer 21: Element and Molecule
Explain Why.
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Question 22: Is the item shown below:A. ElementB. Compound and MoleculeC. Element and MoleculeD. None of the above
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Answer 22:
Compound and Molecule
Explain “Why.”
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Question 23: Element, Compound or Mixture ?
Answer: Element
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Question 24: Element, Compound or Mixture ?
Answer: Element
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Question 25: Element, Compound or Mixture ?
Answer: Mixture of different elements
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Question 26: Element, Compound or Mixture ?
Answer: Mixture of different elements
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Question 27: Element, Compound or Mixture ?
Answer: Compound
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Question 28: Element, Compound or Mixture ?
Answer: Compound
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Question 29: Element, Compound or Mixture ?
Answer: A mixture of a compound and an element
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Question 30:
How do you think you did on this review?
Answers will vary