Chemical/Phys. Reaction + Signs + Atom Counting
Authored by Paige Gartner
Science, Chemistry
6th - 8th Grade
NGSS covered
Used 267+ times
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18 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
When a physical change happens, the form changes, but the ______ doesn't.
size
shape
molecular structure
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
When a chemical reaction happens, _______ .
the size of the sample changes
new molecules are made
sample melts, freezes, or evaporates
Tags
NGSS.MS-PS1-2
3.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Which 2 are examples of a physical changes? (check 2 )
ice melting
sodium and chlorine combining to make sodium chloride (salt)
paper being cut into smaller pieces
wood burning
4.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Which 2 are examples of a chemical changes? (check 2 )
ice melting
sodium and chlorine combining to make sodium chloride (salt)
paper being cut into smaller pieces
wood burning
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
5.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Which are 2 signs that a chemical reaction has happened? (check 2)
color changes
temperature changes (up or down)
form changes (freezing, melting, evaporating)
Tags
NGSS.MS-PS1-2
6.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Which are 2 signs that a chemical reaction has happened? (check 2)
a powdery precipitate forms
the pieces get smaller
fire is created
Tags
NGSS.MS-PS1-2
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
This picture shows which sign that a chemical reaction happened?
a powdery precipitate formed
the temperature dropped
energy changed (light and flames are produced)
Tags
NGSS.MS-PS1-2
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