WorksheetsKnowledge Check -- Chemical Properties and Changes
Total questions: 13
Worksheet time: 12mins
(a) can be observed without changing the object or matter.
Chemical Properties
Chemical Changes
Physical Changes
Which of the following is an example of a physical property?
Reactivity with other chemicals
Flammability
Toxicity
Color
What is a physical change?
A change in color, odor, or temperature
A change in the molecular composition of a substance
A change in state from solid to liquid
A change in reactivity with other chemicals
(a) Physical Changes are reversible
(a) cannot be determined by touching or viewing a sample, they can only be observed by
changing the substance.
Chemical Changes
Physical Changes
Which of the following is a chemical property?
Density
Brittleness
Oxidation
Solubility
What is a chemical reaction?
A change in color, odor, or temperature
A change in state from solid to liquid
A process where new substances are formed
A process where physical properties are altered
What are the signs that a chemical reaction has occurred?
(Select all that apply)
Change in color, odor, or temperature
Formation of bubbles or gas
Production of light
Volume
Are all chemical reactions violent and explosive?
Yes, all chemical reactions are violent and explosive
No, chemical reactions can be slow and nonexplosive
Only reactions involving gases are violent and explosive
Chemical reactions are always unpredictable
There are 3 signs that indicate a chemical reaction occuring (a) , (b) , and (c)
When a gas escapes from a chemical reaction it can be often seen as (a) .
What best describes the law of conservation of mass?
Matter can be created or destroyed
Matter cannot be created or destroyed
Matter can be destroyed but not created
Matter can change form and be destroyed
Match the following images to the correct vocabulary
Physical Change
Chemical change
Chemical Property
Physical Property
