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WorksheetsPhysical and Chemical Changes/Law of Conservation of Matter
Total questions: 20
Worksheet time: 10mins
Which of the following is not a clue a chemical change has occurred?
change in temperature
change in color
change in shape
odor
Is adding sugar to a cup of tea to create a solution a chemical or physical change?
chemical
physical
both
When a nail begins to rust because it has been outside too long this is an example of a _____________ change.
chemical
physical
both
Burning and melting a candle is a _______________ change.
chemical
physical
both
Eating and digesting a hamburger is an ______________ change?
physical
chemical
both
Using an eraser is a ____________________ change.
chemical
physical
both
Burning a log in a fire place is a ______________ change.
chemical
physical
both
When you blow bubbles into milk this is a ____________ change?
chemical
physical
both
This picture is an example of which chemical clue?
temperature change
precipitate
smell/odor
bubbles
Which of the following is not a phase change of matter?
condensing
freezing
burning
boiling
How many elements are in NH4OH?
4
3
2
7
How many atoms of Carbon (C) are in 6C6H12O6
6
12
36
3
How many total atoms are in Co(NO2)3?
3
7
10
12
How many molecules are in 6CO2?
6
3
18
12
Does this equation follow the Law of Conservation of Matter?
Yes
No
Not enough information
Which equation below follows the Law of Conservation of Mass/Matter?
Na + Cl2 → NaCl
C + O2 → CO2
H + F → 3HF
N + 3H → 2NH
CuSO4 is a __________________.
chemical equation
chemical formula
molecule
element
compound
What are the reactants in this chemical equation?
sunlight and chloroplast
water and carbon dioxide
sugar and oxygen
sugar and carbon dioxide
What are the products of cellular respiration?
sunlight and chloroplast
water and carbon dioxide
sugar and oxygen
there are none
NaCl is a
covalent bond
ionic bond
compound
molecule
salt
