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Pure Substances and Mixtures Content Quiz_24.25 _2

Last updated 2 days ago

10 questions

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1

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Question 1

1.

Question 2

2.

This graph shows the effect of temperature on the time it takes salt to dissolve in water.

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Question 5

5.

Question 6

6.

This is calcium carbonate.

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This is kachumbari.  People eat it in East Africa.

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How are homogeneous mixtures and heterogeneous mixtures similar?

They both have different properties throughout the mixture.

They both are made of two or more substances that can be separated physically.

How are pure substances and mixtures different?

Pure substances are very big, but mixtures are very small.

Pure substances are always made of the same elements, but mixtures are two or more substances that can be separated physically.

Question 3

3.

Question 4

4.

Salt water is a homogenous mixture.  Can it be separated physically?

Yes.

No.

Gold is an element.  What is true about gold?

It can be separated physically.

It is made of two or more substances combined together.

It is made of one kind of atom and cannot be divided.

Question 7

7.

Question 8

8.

Question 9

9.

Question 10

10.

How many minutes did it take for the salt to dissolve in cold water?

6

3

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In what temperature of water does salt dissolve the fastest?

Icy

Hot

What is calcium carbonate?

Element

Compound

Homogeneous mixture (solution)

Heterogeneous mixture

How do you know what calcium carbonate is?

Because it can be separated physically.

Because it is made of two or more elements that cannot be separated physically.

What is kachumbari?

Element

Compound

Homogeneous mixture

Heterogeneous mixture

How do you know what kachumbari is?

Because it has the same properties throughout the whole mixture.

Because it does not have the same properties throughout the whole mixture.