1.4
Authored by Lisa Thompson
Science
8th Grade
NGSS covered
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15 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The compound ammonia is composed of nitrogen and hydrogen atoms. If two atoms of nitrogen completely react with six atoms of hydrogen to form two molecules of ammonia, which best describes the number of hydrogen atoms present in the two molecules of ammonia?
two hydrogen atoms
four hydrogen atoms
six hydrogen atoms
Tags
NGSS.MS-PS1-1
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
In the equation below, suppose 11 grams of zinc react with 12 grams of hydrogen chloride to form 16 grams of zinc chloride and an unknown amount of hydrogen gas. Based on the Law of Conservation of Mass, how many grams of hydrogen gas will form?
1 gram
7 grams
19 grams
Tags
NGSS.MS-PS1-5
NGSS.MS-PS1-2
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
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?
A physical change occurred.
Atoms involved in the reaction lost mass.
Precipitates were created in the new solution.
Gases were released to the atmosphere.
Tags
NGSS.MS-PS1-5
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Two neurons connect at a place called a _______.
synapse
stimulus
cerebrum
cell body
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
After seeing a moth, a frog uses its tongue to catch it. This is an example of:
gathering information
responding to a stimulus
maintaining homeostasis
collecting waste
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which is NOT a function of the nervous system?
gathering information
responding to a stimulus
maintaining homeostasis
collecting waste
Tags
NGSS.MS-LS1-3
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A reflex signal must travel to the brain before a response to the stimulus can occur.
True
False
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