REVIEW: Matter & Energy
Quiz
•
Science
•
8th Grade
•
Practice Problem
•
Medium
Standards-aligned
Jennifer Hees
Used 23+ times
FREE Resource
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The best description for a compound is-
two or more elements that are mixed together
two or more elements that are chemically bonded
a substance that contains only one type of atom
a substance that is represented by a symbol
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A student observed that sulfur (S) and bromine (Br) do not conduct electricity. He also observed that oxygen (O) and krypton (Kr) are gases at standard room conditions.
Which correct conclusion did the student reach about the elements?
All four elements are metals.
All four elements are nonmetals.
Sulfur and bromine are metals, and oxygen and krypton are nonmetals.
Sulfur and bromine are nonmetals, and oxygen and krypton are metals.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A neutral atom of sodium (Na) has an atomic number of 11 and a mass of about 23 amu.
Which of the four lists below shows the number of protons, neutrons, and electrons in the atom?
p=12, n=11, e=12
p=11, n=12, e=12
p=23, n=11, e=23
p=11, n=12, e=11
Tags
NGSS.MS-PS1-1
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nitrogen gas (N2) reacts with hydrogen gas (H2) to form ammonia (NH3).
Which is a balanced equation that correctly represents this reaction?
N2 + H2 --> NH3
N2 + H2 --> 2 NH3
N2 + 2 H2 --> 2 NH2
N2 + 3 H2 --> 2 NH3
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which chemical equation correctly demonstrates the law of conservation of mass?
CH4 + 2 O2 --> CO2 + H2O
H2O2 --> 2 H2O + O2
2 Na + Cl2 --> 2 NaCl
2 NH4OH --> 2 NH3 + H2O
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A student mixes two substances together in a flask. Which observation could indicate that a chemical reaction is taking place in the flask?
The flask heats up.
Bubbles of gas form in the flask.
The contents change color.
All of these
Tags
NGSS.MS-PS1-2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The shaded regions in the periodic table show four groupings of elements (A-D).
Which grouping includes mostly elements that do not react readily?
Grouping A
Grouping B
Grouping C
Grouping D
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