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