Download Name: Date: Block:______ GRADE 8 SCIENCE SOL QUESTIONS

Name:______________________________________________________ Date:________________________ Block:_______
GRADE 8 SCIENCE SOL QUESTIONS: 2003, 2004, 2005
1. Which process is a physical change?
a. Rusting iron
b. Burning coal
c. Tarnishing silver
d. Melting ice _
2. When a base is mixed with an acidic solution,
neutralization occurs because the —
a. base reaches absolute zero
b. acid evaporates
c. base chemically reacts with the acid
d. mass of the solution increases
3. 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. a compound
b. a mixture
c. an element
d. an acid
4. In the chemical formula for ammonia, NH3,
what does the subscript 3 represent?
a. The number of nitrogen and hydrogen atoms
in each molecule of ammonia
b. The number of hydrogen atoms in each
molecule of ammonia
c. The number of ammonia molecules that will
bond together
d. The number of nitrogen atoms in each
molecule of ammonia
5. Which instrument would most accurately and
precisely determine the mass of a toy car?
a. An electronic light meter
b. A spring scale
c. A triple-beam balance
d. A graduated cylinder
6. The diagram above shows a block from the
periodic table. The number six represents the
a. atomic mass of the element carbon
b. atomic number of the element carbon
c. number of neutrons in the element carbon
d. number of valence electrons in the element
carbon
7. A mixture of iron filings and sulfur can easily
be separated by —
a. placing the mixture in water
b. performing a chemical reaction
c. heating the mixture
d. using a magnet
8. Of the states of matter, gas is the only state
that —
a. is fluid
b. has mass
c. is highly compressible
d. has a definite shape
9. Which of these is best classified as a
mixture?
a. Carbon dioxide
b. Water
c. Soil
d. Iron
10. Which of these belongs in the outermost shell
(energy level) of an atom? _
a. Electrons
b. Protons
c. Neutrons
d. Photons
11. A substance made up of two or more
elements that have been chemically
combined is called —
a. an atom
b. a compound
c. an element
d. a mixture
12. A proton has which of the following charges?
a. Negative
b. Neutral
c. Positive
d. Magnetic
13. Which of the following lists the elements in
order, from those having the least protons to
those having the most protons in the atoms?
a. O, N, B, Li
b. Na, S, Al, Cl
c. O, S, Se, Te
d. Rb, K, Na, Li
14. Calcium metal (Ca) can be produced by
passing an electric current through molten
calcium chloride (CaCl2). Chlorine gas (Cl2) is
also formed. What is the balanced equation
for this reaction?
a. 2CaCl  Ca + 2Cl
b. CaCl2 + H2O  Ca + ClH + O2
c. CaCl2 + Cl  Ca + Cl3
d. CaCl2  Ca + Cl2
Name:______________________________________________________ Date:________________________ Block:_______
15. The density of an object is dependent upon
the object’s mass and —
a. height
b. area
c. volume
d. weight
22. Which of these is a change in chemical
composition?
a. A lake freezes solid.
b. Gravel, sand, and water are mixed.
c. A copper bar is rolled into a flat sheet.
d. Vinegar bubbles when baking soda is added.
16. Which of these will cause water to change to
ice?
a. Removing heat from the water
b. Stirring the water
c. Adding salt to the water
d. Putting the water in the sunlight
23. Which of these elements has an atomic
number of 14?
a. N
b. Al
c. Si
d. P
17. Which of the following elements belongs to
the family indicated?
a. Nitrogen belongs to the halogen family.
b. Helium belongs to the noble gas family.
c. Calcium belongs to the alkali family.
d. Sodium belongs to the alkaline earth family
24. Tearing paper is an example of a —_
a. physical change
b. chemical change
c. chemical reaction
d. solution
18. The atom is composed of electrons, protons,
and neutrons. What is the electric charge on
the neutron?
a. -1
b. 1
c. 0
d. -2
19. Several centuries ago, men called alchemists
tried to transform common metals into gold.
Even though they tried many different
chemical and physical methods, they never
succeeded because —
a. they could not heat common metals to
extremely high temperatures
b. the common metals they worked with were
not pure
c. they did not add the correct material to the
common metal
d. elements cannot be changed to other
elements by physical or chemical means
20. Mercury is a liquid metal that is used in many
thermometers. The mercury in the
thermometer rises because it —
a. is sucked upward by vacuum
b. expands when heated
c. is compressed by air pressure
d. increases in density when heated
21. Which of the following is a physical property
of copper?
a. Ductile, can be drawn into a wire
b. Liquid at room temperature
c. Readily reacts with water to form an acid
d. Readily reacts with oxygen