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Elements Compounds And Mixtures
Test Description: 8th grade review of elements compounds and mixtures
Instructions: Answer all questions to get your test result.
1) What is a pure substance made of two or more elements that are chemically combined?
A
mixture
B
element
C
compound
D
solutions
2) Which of the following describes a mixture?
A
can be separated only by chemical means
B
formed from two or more substances chemically combine
C
made up of two or more substances that keep their identities
D
made up of two or more substances joined in a specific ratio
3) Which of the following substances can be separated into simpler substances only by chemical means?
A
gold
B
salt water
C
water
D
sodium
4) Which of these is NOT considered a pure substance
A
an element
B
a mixture
C
an atom
D
a compound
5) Because zinc can combine with other substances but cannot be changed into a simpler substance by an ordinary chemical process, zinc is classified as
A
an element
B
a solution
C
a compound
D
a mixture
6) Which of the following sentences best describes table salt?
A
Salt is a pure substance made from two compounds
B
salt is an element made from two mixtures
C
salt is a mixture made from two elements
D
Salt is a compound made from two elements
7) Which of the following does NOT describe elements?
A
can be broken down into simpler substances and retain the characteristics of the element
B
all the particles are alike
C
can join together to form compounds
D
have unique sets of properties
8) Air is
A
a compound
B
a pure substance
C
a mixture
D
an element
9) Italian dressing is
A
a element
B
a compound
C
a heterogeneous mixture
D
a homogeneous mixture
10) Which of the following is a compound
A
Carbon Monoxide (CO)
B
Carbon (C)
C
Copper (Cu)
D
club soda
11) How is a mixture different from a compound?
A
Mixtures are commonly found in nature.
B
Each substance in a mixture keeps its identity.
C
Mixtures have two or more components
D
Solids, liquids and gases can form mixtures.
12) A material is only a mixture if
A
all of the above
B
it develops its own set of characteristic properties.
C
you can always see all the components.
D
you can physically separate the different components.
13) . A dish is given to you, which contains a blackish-yellow powder. When you move a magnet over it, you are amazed to see black particles, (which you find out are iron) fly upwards and get stuck to the magnet, and all that's left in the dish is a yel
A
compound
B
mixture
C
pure substance
D
element
14) What type of mixture is salad
A
heterogeneous
B
salad is not a mixture
C
homogeneous
D
solutions
15) A solution is always a
A
liquid
B
heterogeneous mixture
C
pure substance
D
homogeneous mixture
*select an answer for all questions
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