WorksheetsMJU3 Lesson 1 Quiz
Total questions: 10
Worksheet time: 10mins
What process is an example of chemical change?
Cooking a steak
Chopping a tree
Heating a cup of tea
Drying clothes in the dryer
What property could be used to identify a substance?
mass
weight
density
volume
Which process is an example of a purely physical change?
burning
rusting
flattening
decomposing
Which statement indicates if a chemical reaction has taken place?
A loud noise is produced by a crushing can.
A puddle is produced by melting an ice cube.
An odor produced by burning a sugar cube.
A shard of glass is produced by breaking a bottle.
A chemical reaction occurs. Which statement is true of reactants and the products in the reaction?
The atoms in the products were regrouped into different molecules to form the reactants.
The atoms in the reactants were regrouped into different molecules to form the products.
The atoms in the product were destroyed and new molecules appeared to form the reactants.
The atoms in the reactants were destroyed and new molecules appeared to form the products.
A student observed a precipitate form during a chemical reaction. Which of the following did the student most likely observe?
Bubbles of gas floated to the top of a solution.
The color of a liquid changed when a solid was added to it.
Steam rose from a flask when a powder was added to a 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 in to a fine powder.
Water droplets form on the outside of a cold drink glass.
An antacid tablet is added to water and bubbles are produced.
Which of the following is the best evidence that a chemical change has taken place?
The apple is smaller in size after cutting.
The apple is turning brown.
The apple has changed shape.
A science class did an experiment in which two substances were mixed. After 15 minutes, everything looked the same, but the students noticed an odor coming from the experiment. What does this likely indicate?
A liquid was formed.
A temperature change occurred.
A chemical reaction occurred.
A physical change occurred.
Based off of what you observe in the beakers, which of the following statements is true?
Chemical reactions can be seen.
The two samples of metal are different substances.
Chemical reactions are unpredictable.
New substances are formed in each beaker.
