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WorksheetsDay 2 -- 8th Grade Science STAAR Review THMS
Total questions: 14
Worksheet time: 7mins
Name
Class
Date
1.
All living things require oxygen to survive. Where on the periodic table above would you find gases like oxygen?
a)
section A
b)
section B
c)
section C
d)
section D
2.
Henry is investigating the properties of elements in section A. What are the general characteristics of elements from section A?
a)
conducts heat and electricity, shiny, and solid
b)
mostly gases and are very reactive
c)
share properties of metals and nonmetals
d)
liquids that are stable in pure form
3.
Some elements have properties of metals and nonmetals, which make them useful in electronic devices. Where can these elements be found?
a)
section A
b)
section B
c)
section C
d)
section D
4.
Transition metals are malleable and are found in section B. What is another property of metals in section B?
a)
conducts heat
b)
liquid state of matter
c)
highly reactive and never found as a pure element
d)
poor conductors of electricity
5.
Which two sections of elements are mostly likely to react and form chemical bonds with one another?
a)
section A and section B
b)
section B and section C
c)
section C and section D
d)
section D and section A
6.
CH4 +2O2 → CO2 +2H2O
How many different elements are involved in this reaction?
How many different elements are involved in this reaction?
a)
two
b)
three
c)
four
d)
five
7.
CH4 +2O2 → CO2 +2H2O
How many atoms are there on the left side of the equation compared to the right side?
How many atoms are there on the left side of the equation compared to the right side?
a)
The left side has more atoms than the right side.
b)
The right side has more atoms than the left side.
c)
The left and right side have the same number of atoms.
d)
It is impossible to know because it depends on the reaction speed.
8.
CH4 +2O2 → CO2 +2H2O
How many atoms of hydrogen are involved in this reaction? Record you answer below.
How many atoms of hydrogen are involved in this reaction? Record you answer below.
a)
6
b)
10
c)
4
d)
2
9.
CH4 +2O2 → CO2 +2H2O
Which of the following lab equipment is necessary when conducting this reaction?
Which of the following lab equipment is necessary when conducting this reaction?
a)
A filter to safeguard against contaminants in the water used to initiate the reaction.
b)
A glass beaker to hold the methane gas.
c)
A magnet to ensure the oxygen is free of iron filings.
d)
A fire extinguisher as a safety precaution since the methane gas is flammable.
10.
In the hypothetical chemical reaction below, which element will be recombined into two separate atoms of one single element following the reaction?
2AB + C2 → 2CB + 2A
2AB + C2 → 2CB + 2A
a)
element A
b)
element B
c)
element C
d)
All of the reactants will recombine into two separate atoms of a single element.
11.
Consider the following reaction between iron and oxygen to form iron oxide.
2Fe + O2 → 2FeO
Iron oxide is a (an):
2Fe + O2 → 2FeO
Iron oxide is a (an):
a)
element
b)
compound
c)
product
d)
both B and C
12.
In the table above, what would be an appropriate title for column C?
a)
Metals
b)
Nonmetals
c)
Metalloids
d)
Solid Compounds
13.
The chart below shows the densities of various substances. Which of the answer choices indicate the mass of 6 cm3 of salt?
a)
0.06 grams
b)
6.0 grams
c)
12.6 grams
d)
81.0 grams
14.
When comparing two elements on the periodic table, elements in the same ___________ are most likely to have similar chemical and physical properties.
a)
group
b)
period
c)
area
d)
section
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