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Mid-Term Review 8th Grade Physical Science 2
Test Description: Use this to help you study for the Mid Term Exam.
Instructions: Answer all questions to get your test result.
1) Whole numbers that come before a substance in a chemical formula (such as 3CO or 4KCl) indicate
A
the order of the compounds in the formula
B
the mass number of the compound
C
the number of atoms in the compound
D
the number of molecules of the compound
2) How many centimeters are in a meter?
A
100
B
1000
C
10
D
.01
3) Which of the following can be separated into its components with a filter?
A
elements
B
solutions
C
compounds
D
suspensions
4) Which of these groups of letters could be used as a symbol for a single element?
A
Car
B
Cm
C
HF
D
fe
5) What is the main purpose of the scientific method?
A
To prove that the scientist's ideas are right
B
To make a scientific law
C
To follow a set of rules so scientists do the same thing
D
To solve a problem or better understand an observation
6) The distance between the Earth and the Sun is about 1.5 x 1011 m. In standard notation?
A
-150,000,000
B
150,000,000,000
C
150,000,000
D
0.000000000150
7) If you measured 2,300 grams, how many kilograms did you measure?
A
23 kg
B
2.3 kg
C
.23 kg
D
230 kg
8) Combining 2.5kg of A with 1.5kg of B creates new substances with different properties.
A
Only new compounds will result, not single elements.
B
This will release heat when it occurs.
C
Mass of new substances equals mass of original materials.
D
The mass of material created depends on the compounds used.
9) Which of the following is not a physical property?
A
boiling point
B
density
C
flammability
D
conductivity
10) Atoms of elements whose atomic mass is shown as a decimal in the periodic table
A
have different numbers of protons
B
have different numbers of electrons
C
have different isotopes
D
are counting the mass of electrons
*select an answer for all questions
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