Virtual Test MJ.U3.L1.

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

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which property could be used to identify a substance?

• mass

• weight

• density

• volume

In the laboratory, Austin is given a mixture of iron filings, sand, and salt. To separate the mixture, Austin uses a magnet, boiling water, and a filter. Which statement is true about the process Austin uses to separate this mixture?

• Austin uses only physical changes to separate the mixture’s components.

• Austin uses only chemical changes to separate the mixture’s components.

• Austin uses both physical and chemical changes to separate the mixture’s components.

• Austin uses neither physical nor chemical changes to separate the mixture’s components.

Which statement indicates that a chemical reaction has taken place?

• A loud noise is produced by crushing a can.

• A puddle is produced by melting an ice cube.

• An odor is produced by burning a sugar cube.

• A shard of glass is produced by breaking a bottle.

Tags

NGSS.MS-PS1-2

A chemical reaction occurs. Which statement is true of the 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 products 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.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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.

Tags

NGSS.MS-PS1-2

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 a cold drink glass.

• An antacid tablet is added to water and bubbles are produced.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Ed made pancakes from batter, freshly squeezed orange juice, fried eggs, and a strawberry fruit salad. Identify the chemical changes that occur to the food items during breakfast preparation.

• Warming the batter

• Squeezing the oranges for juice

• Chopping the strawberries for the salad

• Frying the eggs

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5