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WorksheetsMod J Unit 3 Lesson 1 Quiz - Chemical Reactions
Total questions: 10
Worksheet time: 50mins
Which process is an example of a chemical change?
cooking a steak
chopping a tree
heating a cup of tea
drying clothes in the dryer
Which property could be used to identify a substance?
mass
weight
density
volume
Austin has a mixture of iron filings, sand, and salt. To separate them he uses a magnet, boiling, and a filter. Which is true?
Austin uses only physical changes to separate the components.
Austin uses only chemical changes to separate the components.
Austin uses both physical and chemical changes to separate the components.
Austin uses neither physical nor chemical changes to separate the mixture.
Which indicates that a chemical reaction has taken place?
A loud noise produced when crushing a can.
A puddle produced by melting an ice cube.
An odor produced by burning a sugar cube.
A shard of glass produced by breaking a bottle.
A chemical reaction occurs. Which is true of the reactants and the products?
Atoms in the products are regrouped into different molecules to form reactants.
Atoms in the reactants are regrouped into different molecules to form the products.
Atoms in the products were destroyed and new molecules appeared to form the reactants.
A student observed a precipitate form during a chemical reaction. Which did the student most likely observe?
Bubbles of gas floated to the top of a solution.
The color of the liquid changed when a solid was added.
Steam rose from a flask when powder was added to the liquid.
A solid sank to the bottom of a container when two liquids were mixed.
Which process is an example of a chemical change?
Salt mixes with water and dissolves.
An aspirin tablet is crushed into a fine powder.
Water droplets form on the outside of as cold drink glass.
An antacid tablet is added to water and bubbles are produced.
Which is the best evidence that a chemical change has occurred?
The apple is smaller after being cut.
The apple is turning brown.
The apple has changed shape.
Two metals are placed the same liquid. What evidence indicates that a chemical reaction is happening in one of the beakers? Check all that apply.
A gas is being given off.
There is a change in color.
The solution is clear and colorless.
Bubbles are forming.
Based on what you observed in the beakers, which is true?
Chemical reactions can always be seen.
The two samples are different substances.
