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Compound And Molecules
Test Description: Grades 6-8 Physical Science
Instructions: Answer all questions to get your test result.
1) ___ are substances that CANNOT be broken down or separated into simpler substances.
A
mixtures
B
compounds
C
elements
D
minerals
2) An ___ is the smallest piece of an element that can exist.
A
proton
B
subatomic particle
C
atom
D
molecule
3) There are ___ (#) different types of elements.
A
3
B
millions of
C
92
D
118
4) A ___ is 2+ elements chemically combined together.
A
compound
B
element
C
mixture
D
mineral
5) A ___ is a group of atoms chemically bonded together.
A
superatomic particle
B
subatomic particle
C
molecule
D
atom
6) A ___ is the smallest piece of a compound that can exist.
A
atom
B
subatomic particle
C
molecule
D
proton
7) Water, salt, carbon dioxide, and sugar are examples of ___.
A
minerals
B
elements
C
compounds
D
mixtures
8) Iron, carbon, hydrogen and oxygen are examples of ___.
A
mixtures
B
minerals
C
elements
D
compounds
9) There are ___ (#) different types of compounds.
A
3
B
118
C
92
D
millions of
10) A chemical ___ is the force that hold the atoms in molecules together.
A
tie
B
bond
C
link
D
chain
11) ___ describes how something looks, feels, smells, tastes, or behaves.
A
propery
B
chemical change
C
composition
D
physical change
12) ___ describes the stuff that something is made from.
A
property
B
physical change
C
composition
D
chemical change
13) A ___ is a short, abbreviation for a compound - uses chemical symbols subscript numbers
A
chemical symbol
B
chemical formula
C
chemical equation
D
atomic number
14) Compounds have ___ the elements they are made from.
A
the exact same properties as
B
a combination of the properties of
C
only the most important properties from
D
different properties from
15) A ___ substance is made of only one type of particle.
A
mixed
B
chemical
C
molecular
D
pure
16) ___ is the chemical formula for water.
A
NaCl
B
CO2
C
H2O2
D
H2O
17) ___ is the chemical formula for carbon dioxide.
A
CO2
B
CO
C
C2O
D
C6H12O6
18) Compounds often form during ___.
A
physical reactions
B
accidents
C
physical changes
D
chemical reactions
19) Compounds are ___.
A
physically mixed
B
physically blended
C
the simplest substances
D
chemically combines
*select an answer for all questions
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