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Mid-Term Review 8th Grade Physical Science 4
Test Description: Use this to help you study for the test.
Instructions: Answer all questions to get your test result.
1) A scientist manipulates the light 3 plants receive, and then measures their growth. Light is
A
hypothesis
B
dependent variable
C
independent variable
D
control
2) Which of the following statements does not apply to a compound?
A
it has components that are joined in fixed proportions
B
it can be separated into components by physical methods
C
it can be chemically broken down into elements or compounds
D
it is made of two or more elements
3) One of the most influential factors in determining an element's reactivity is _______________.
A
the size of its nucleus.
B
how much of it is present during a reaction.
C
how many valence electrons it has.
D
whether or not it is flammable.
4) All of the following are clues that a chemical change has occurred except for ________________
A
solid precipitate formed
B
new substances formed
C
mass changes
D
color changes
5) In a covalently bonded molecule, the electrons between elements are
A
destroyed
B
not involved with the bonding process.
C
shared between the atoms.
D
transferred from one element to the other.
6) Which of the following represents a chemical change?
A
wood splitting in two
B
nail rusting
C
salt being added to water
D
ice melting
7) A scientist waters plants different amounts and measures their growth. The growth is the
A
hypothesis
B
independent variable
C
dependent variable
D
control
8) Which of these substances is a compound?
A
water
B
copper
C
air
D
oxygen
9) The two sides of a chemical equation are called
A
coefficients and subscripts
B
reactants and products
C
variables and controls
D
ingredients and outcomes
10) True or False: Phase Change is a CHEMICAL change.
A
False
B
True
C
N/A
D
N/A
*select an answer for all questions
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