
Evidence of Chemical Changes
Authored by Morgan Cook
Science
10th - 12th Grade
NGSS covered
Used 7+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
0 sec • 1 pt
A student mixes two clear liquids together. After a few minutes, a white powdery solid can be seen settling on the bottom of the test tube. Which of the following is a conclusion that the student can draw based on these observations? The two clear liquids-
were pure substances before they were mixed
are toxic and should be handled with extreme caution
have gone through a chemical change in which a new substance called a precipitate was produced
have been stored too long and are no longer good
Tags
NGSS.MS-PS1-2
2.
MULTIPLE CHOICE QUESTION
0 sec • 1 pt
A student added white crystals to a clear liquid. The crystals dissolved in the liquid. After a few seconds, the liquid became quite warm and then turned bright red in color. Indications that a chemical change was taking place could be observed when –
the white crystals were added to the clear liquid.
the crystals dissolved in the liquid leaving only the liquid visible
There are no indications of chemical change
the temperature of the liquid increased and an unexpected color change occurred.
Tags
NGSS.MS-PS1-2
3.
MULTIPLE CHOICE QUESTION
0 sec • 1 pt
What piece of evidence can be seen in the chemical equation below:
SiCl4(l) + H2O(l) → SiO2(s) + HCl(aq)
Change in energy (temperature, smell, or light)
Change in color
Formation (creation) of a gas
Formation (creation) of a precipitate
Formation (creation) of water
Tags
NGSS.MS-PS1-2
4.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
What are three pieces of evidence that a chemical change is occurring?
color change
gas production
ice formation
light or heat is produced
formation of a precipitate
Tags
NGSS.MS-PS1-2
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
What piece of evidence is show in the written equation,
CaCO3(s) → CaO(s) + CO2(g)?
formation (creation) of a precipitate
formation (creation) of a gas
formation (creation) of water
change in color
change in energy (temperature, light, smell)
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-5
6.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
what pieces of evidence can be seen in the equation below? (Pick 2)
formation (creation) of a gas
formation (creation) of a precipitate
change in energy (temperature, light, smell)
formation (creation) of water
change in color
Tags
NGSS.MS-PS1-2
NGSS.MS-PS1-4
7.
MULTIPLE SELECT QUESTION
0 sec • 1 pt
What pieces of evidence are written into the chemical equation below?
8 CO(g) + 17 H2(g) → 1 C8H18(l) + 8 H2O(g)
formation (creation) of a gas
formation (creation) of a precipitate
formation (creation) of water
change in colorf
change in energy (temperature, light, smell)
Tags
NGSS.MS-PS1-2
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