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Ch. 3 Chemistry Review 7 th Grade Science

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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 Presentation

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Page 1: Ch. 3 Chemistry Review

Ch. 3 Chemistry Review

7th Grade Science

Page 2: Ch. 3 Chemistry Review

Question 1

A pure substance made of two or more elements

that are chemically combined.

Page 3: Ch. 3 Chemistry Review

Answer 1

Compound

Page 4: Ch. 3 Chemistry Review

Question 2

When iced tea mix is combined with water,

this is the solvent.

Page 5: Ch. 3 Chemistry Review

Answer 2

water

Page 6: Ch. 3 Chemistry Review

Question 3

Choose the correct example of a physical property.(density, flammability,

reactivity)

Page 7: Ch. 3 Chemistry Review

Answer 3

Density

Page 8: Ch. 3 Chemistry Review

Question 4

How is a mixture different from a compound?

Page 9: Ch. 3 Chemistry Review

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.

Page 10: Ch. 3 Chemistry Review

Question 5

A metal dissolved in a metal is known as

_________________. Steel is an example.

Page 11: Ch. 3 Chemistry Review

Answer 5

alloy

CO2CO2

Page 12: Ch. 3 Chemistry Review

Question 6

A salad would be referred to as a : (solution,

mixture, or compound)

Page 13: Ch. 3 Chemistry Review

Answer 6

Mixture

Page 14: Ch. 3 Chemistry Review

Question 7

An object that has properties of both

solutions and suspensions is know as a

……….

Page 15: Ch. 3 Chemistry Review

Answer 7

Colloid

Page 16: Ch. 3 Chemistry Review

Question 8

List two elements.

Page 17: Ch. 3 Chemistry Review

Answer 8

118 possible answers…use your periodic table

to ensure you are correct.

Page 18: Ch. 3 Chemistry Review

Question 9

Give an example of a solute that can be

dissolved into water.

Page 19: Ch. 3 Chemistry Review

Answer 9

Iced tea mix, lemonade mix, salt, sugar, etc.

Page 20: Ch. 3 Chemistry Review

Question 10

NaCl is classified as a ________________.

Page 21: Ch. 3 Chemistry Review

Answer 10

Compound

Page 22: Ch. 3 Chemistry Review

Question 11

What is formed when particles of two or more

substances are distributed evenly among

each other?

Page 23: Ch. 3 Chemistry Review

Answer 11

Solution

Page 24: Ch. 3 Chemistry Review

Question 12

What are three ways to dissolve a solute more quickly in a solvent?

Page 25: Ch. 3 Chemistry Review

Answer 12

Mix it more, crush it, heat the solute.

Page 26: Ch. 3 Chemistry Review

Question 13

This compound is used by plants during

photosynthesis.

Page 27: Ch. 3 Chemistry Review

Answer 13

CO2

CO2CO2

Page 28: Ch. 3 Chemistry Review

Question 14

List one element that is classified as a nonmetal.

Page 29: Ch. 3 Chemistry Review

Answer 14

Use your periodic table to check your answer. (You

will need this for the test!)

CO2CO2

Page 30: Ch. 3 Chemistry Review

Question 15

A smoothie is a great example of this type of

mixture: _______________.

Page 31: Ch. 3 Chemistry Review

Answer 15

suspension

CO2CO2

Page 32: Ch. 3 Chemistry Review

Question 16

Sand, Soil, and Dirt are all examples of

________________.

Page 33: Ch. 3 Chemistry Review

Answer 16

A mixture of solids.

CO2CO2

Page 34: Ch. 3 Chemistry Review

Question 17

What is a pure substance?

Page 35: Ch. 3 Chemistry Review

Answer 17

A single element or compound that has definite chemical or physical properties.

CO2CO2

Page 36: Ch. 3 Chemistry Review

Question 18

Give an example of a pure substance.

Page 37: Ch. 3 Chemistry Review

Answer 18

Any compound or element would be a

correct answer.

CO2CO2

Page 38: Ch. 3 Chemistry Review

Question 19

What ways can be used to separate a mixture?

Page 39: Ch. 3 Chemistry Review

Answer 19

A magnetA centrifugeDistillation

A Filter

CO2CO2

Page 40: Ch. 3 Chemistry Review

Question 20: Is the item shown below:A. ElementB. Compound and MoleculeC. Element and MoleculeD. None of the above

Page 41: Ch. 3 Chemistry Review

Answer 20: Element

Explain Why.

Page 42: Ch. 3 Chemistry Review

Question 21: Is the item shown below:A. ElementB. Compound and MoleculeC. Element and MoleculeD. None of the above

Page 43: Ch. 3 Chemistry Review

Answer 21: Element and Molecule

Explain Why.

Page 44: Ch. 3 Chemistry Review

Question 22: Is the item shown below:A. ElementB. Compound and MoleculeC. Element and MoleculeD. None of the above

Page 45: Ch. 3 Chemistry Review

Answer 22:

Compound and Molecule

Explain “Why.”

Page 46: Ch. 3 Chemistry Review

Question 23: Element, Compound or Mixture ?

Answer: Element

Page 47: Ch. 3 Chemistry Review

Question 24: Element, Compound or Mixture ?

Answer: Element

Page 48: Ch. 3 Chemistry Review

Question 25: Element, Compound or Mixture ?

Answer: Mixture of different elements

Page 49: Ch. 3 Chemistry Review

Question 26: Element, Compound or Mixture ?

Answer: Mixture of different elements

Page 50: Ch. 3 Chemistry Review

Question 27: Element, Compound or Mixture ?

Answer: Compound

Page 51: Ch. 3 Chemistry Review

Question 28: Element, Compound or Mixture ?

Answer: Compound

Page 52: Ch. 3 Chemistry Review

Question 29: Element, Compound or Mixture ?

Answer: A mixture of a compound and an element

Page 53: Ch. 3 Chemistry Review

Question 30:

How do you think you did on this review?

Answers will vary