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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
element
B
solutions
C
compound
D
mixture
2) Which of the following describes a mixture?
A
made up of two or more substances that keep their identities
B
made up of two or more substances joined in a specific ratio
C
can be separated only by chemical means
D
formed from two or more substances chemically combine
3) Which of the following substances can be separated into simpler substances only by chemical means?
A
gold
B
sodium
C
water
D
salt water
4) Which of these is NOT considered a pure substance
A
an atom
B
a mixture
C
an element
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 mixture
D
a compound
6) Which of the following sentences best describes table salt?
A
Salt is a compound made from two elements
B
salt is an element made from two mixtures
C
Salt is a pure substance made from two compounds
D
salt is a mixture 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
have unique sets of properties
C
all the particles are alike
D
can join together to form compounds
8) Air is
A
an element
B
a mixture
C
a compound
D
a pure substance
9) Italian dressing is
A
a compound
B
a element
C
a heterogeneous mixture
D
a homogeneous mixture
10) Which of the following is a compound
A
Carbon Monoxide (CO)
B
Copper (Cu)
C
club soda
D
Carbon (C)
11) How is a mixture different from a compound?
A
Mixtures are commonly found in nature.
B
Solids, liquids and gases can form mixtures.
C
Mixtures have two or more components
D
Each substance in a mixture keeps its identity.
12) A material is only a mixture if
A
you can always see all the components.
B
all of the above
C
you can physically separate the different components.
D
it develops its own set of characteristic properties.
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
pure substance
C
mixture
D
element
14) What type of mixture is salad
A
solutions
B
homogeneous
C
salad is not a mixture
D
heterogeneous
15) A solution is always a
A
pure substance
B
liquid
C
heterogeneous mixture
D
homogeneous mixture
*select an answer for all questions
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