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