Yr9 Chemistry
Authored by Daniel McCaul
Chemistry
9th Grade
NGSS covered
Used 53+ times
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24 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
An electron is
positively charged
neutral
negatively charged
cannot be determined
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Conservation of mass means
all the atoms present before a chemical reaction are not present after
atoms present before chemical reactions are present after
new substances and new elements are formed in a chemical reaction
students should not add anything to the test tube during the experiment
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
A molecule is
a singular particle of a particular element
another name for an element
2 or more atoms that are combined
a small piece of DNA
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
The type of reaction that releases energy as heat is called
endothermic
exothermic
respiration
photosynthesis
Tags
NGSS.HS-PS1-4
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
What is a charged atom known as?
an ion
an isotope
an electron cloud
a quark
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
The pH scale is a range from:
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
A(n) ______ is a substance with a pH less than 7
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