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Pure Substances and Mixtures Content Quiz_24.25
By Newcomer International Center
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Last updated 2 days ago
9 questions
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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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1
Question 5
5.
Question 6
6.
This is calcium carbonate.
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1
This is kachumbari. People eat it in East Africa.
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Question 9
9.
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.
They both are made of only one substance.
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.
Pure substances are made of three different substances with different parts that you can see, but mixtures are only made of one substance.
Question 3
3.
Question 4
4.
Salt water is a homogenous mixture. Can it be separated physically?
Yes.
No.
We don't know.
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.
Is kachumbari an element, compound, homogeneous mixture (solution), or heterogeneous mixture? Why?
Kachumbari is a _____________________ because _________________________________.
How many minutes did it take for the salt to dissolve in
cold
water?
6
3
2
1
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 does not have the same properties throughout.
Because it can be separated physically.
Because it is made of two or more elements that cannot be separated physically.