Monday, 10-23-17 Quarterly Review Homework
Directions:
 Choose the best possible answers for the questions found below.
 HIGHLIGHT your answer choice.
1.
A.
B.
C.
D.
A.
B.
C.
D.
A.
B.
C.
D.
A researcher uses several procedures to separate a
rock sample into different chemicals. A mass of 50
grams of one chemical is produced. If this chemical
cannot be separated into other chemicals, then it is
BEST described as (8.P.1.1)
A compound
A mixture
A solution
An element
2. Which is the best example of a heterogeneous mixture?
(8.P.1.1)
Sugar
Brass
Salad
Salt water
3. When potassium and bromine atoms form chemical
bonds, which of these is produced? (8.P.1.1)
An element
A mixture
A compound
a new form of matter
4.
A.
B.
C.
D.
Which best describes a heterogeneous mixture?
(8.P.1.1)
It contains only one type of atom.
It is composed of two or more elements in a fixed pattern.
It contains two or more types of particles which are easily
distinguished.
It is composed of two or more substances in which particles are
evenly blended.
5.
A.
B.
C.
An element, X, contains 14 protons, 15 neutrons, and 14
electrons. Which is most likely the same element as X?
(8.P.1.1)
Element A: 13 protons, 15 neutrons, 14 electrons
Element B: 14 protons, 14 neutrons, 14 electrons
Element C: 15 protons, 14 neutrons, 15 electrons
6.
A.
B.
C.
D.
Where would a new highly reactive metal most likely be
placed on the periodic table? (8.P.1.2)
right side
left side
middle
top
7.
A.
B.
C.
D.
Which element is a member of the halogen family?
(8.P.1.2)
helium (He)
oxygen (O)
sodium (Na)
chlorine (Cl)
11. What do bubbles most likely indicate in a chemical reaction?
(8.P.1.3)
A. Phase change
B. Gas formation
C. temperature change
D. precipitate formation
12. What is the best description of what has happened to flowers
when they change color as they mature? (8.P.1.3)
A. a formation of a mixture
B. a chemical reaction
C. a physical reaction
13. Liquid gasoline burns in a car’s engine and undergoes a
chemical change. Which provides evidence of the chemical
change? (8.P.1.3)
A. The liquid is converted into a solid state, and heat is absorbed.
B. The liquid is converted into a gaseous state, and heat is
produced.
C. The liquid is converted into a solid state, and a precipitate is
formed.
D. The liquid is converted into a gaseous state, and a precipitate is
formed
14. Some power plants produce energy by burning coal. In these
power plants, the heat from burning coal is used to boil water.
Which statement BEST describes the changes that occur when
burning coal and boiling water? (8.P.1.3)
A. Burning coal and boiling water are both physical changes.
B. Burning coal and boiling water are both chemical changes.
C. Burning coal is a chemical change, and boiling water is a physical
change.
D. Burning coal is a physical change, and boiling water is a chemical
change.
15. Which best explains why the total mass of the product(s) would
be less than the total weight of the reactant(s) after a chemical
reaction? (8.P.1.4)
A physical change occurred
Atoms involved in the reaction lost mass.
Precipitates were created in the new solution.
Gases were released to the atmosphere.
16. A student mixed 10 grams of a powdery substance with 200
grams of an acid solution. A bubbly solution weighing 205 grams
was formed. Which best explains why the mass of the new solution
does not equal the mass of the reactants? (8.P.1.4)
A. The other 5 grams changed color.
B. The other 5 grams created a precipitate.
C. The other 5 grams were released as a gas.
D. The other 5 grams weighed less in the acid.
17. What is the total number of oxygen atoms on the reactant side
of the equation shown below? (8.P.1.4)
A.
B.
2
3
CH3COOH + NaHCO3 → CH3COONa + H2O + CO2
8.
A.
B.
C.
Which elements are the least reactive on the periodic
table? (8.P.1.2)
Halogens
Noble gases
alkali metals
9.
A.
B.
C.
D.
A.
B.
C.
Which characteristic of an element determines its
placement in the periodic table? (8.P.1.2
Mass
Size
number of neutrons
number of protons
10. How are elements on the periodic table organized by
their properties? (8.P.1.2
In groups
By masses
In periods
C. 5
D. 7
18. Which are conserved during a chemical reaction? (8.P.1.4)
THINK ABOUT THE LAW OF CONSERVATIONS OF MASS/MATTER
A. mass and atoms
B. volume and mass
C. atoms and molecules
D. molecules and volume
19. Which best represents a balanced equation? (8.P.1.4)
A.
Mg(s) + 2O2(g)
B.
Mg(s) + O2(g)
C.
2Mg(s) + O2(g)
2MgO(s)
2MgO(s)
2MgO(s)
20.When looking at the 3 different states of matter (solid, liquid
& gas), which of the following places them in order from the
MOST molecular (the fastest) to the LEAST molecular (the
slowest) motion?
A. Solid, liquid, gas
b. Solid, gas, liquid
c. Liquid, solid, gas
d. Gas, liquid, solid