Chemistry Competition 2021
Authored by Srikiran Sripada
Chemistry
KG - 8th Grade
Used 2+ times
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35 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following phases of matter as the highest kinetic energy (besides plasma)?
Gas
Liquid
Solid
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Which of the following states of matter has the highest potential energy?
Gas
Liquid
Solid
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
A physical substance that has mass and occupies space is called what?
Radiation
Matter
Darkmatter
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Which type of chemical formula always matches its structural formula (diagram)?
Molecular
Empirical
5.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Which of the following are characteristics of the ball-and-stick model?
Proportional atom sizes
Equal atom sizes
Bonds shown as cylindrical connections
Atoms are spherical
6.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
What is true of physical changes?
They are reversible
They are chemical reactions
They change a substance's composition
They change a substance's phase
7.
MULTIPLE SELECT QUESTION
20 sec • 1 pt
Select all that are physical changes
Water boiling
Food digesting
Wood cutting
Fuel burning
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