Changes in Matter

What type of change can be easily reversed?

• chemical change

• physical change

• both chemical and physical changes

• neither physical or chemical changes

Which of the following examples is a physical change but NOT a change of state of matter?

• logs burning

• water freezing into ice cubes

• candle wax melting

• paper being cut

What is the best way to separate a mixture of sugar, sand, and water?

• Freeze the mixture, causing the water to be destroyed, then sift the sugar from the sand.

• Filter the sand from the sugar and water, then heat the mixture, causing the water to evaporate.

• Filter the mixture, causing the sugar and sand to get caught but not the water.

• Stir the mixture, causing the water to move above the sugar and sand.

A 5th grade student places baking soda in a cup. The student then adds vinegar to the cup. The student collects the data below from the experiment. Based upon the results of the experiment, which statement BEST describes whether the change is a physical or chemical change.

• The data concludes that a physical change has occurred because it had an increased change in temperature, which resulted in the liquid to start bubbling.

• The data concludes that a physical change has occurred because the color of the liquid changed when you mixed two materials.

• The data concludes that a chemical change has occurred because there was formation of bubbles when the materials reacted to each other.

• The data concludes that a chemical change has occurred because mixing two substances together will always result in a reaction.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is a correct statement about the investigations?

• All of the situations are examples of physical changes because all of the investigations exhibit changes to the physical properties.

• None of the situations are examples of physical changes because they all involve a color change.

• Situation 2 is a physical change because rust forming is a natural process.

• Situations 1 and 3 are physical changes because no new substances are formed.

Tags

NGSS.MS-PS1-2

Is this an example of a physical or chemical change?

• physical

• chemical

Tags

NGSS.MS-PS1-4

Is this an example of a physical or chemical change?

• physical

• chemical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is this an example of a physical or chemical change?

• physical

• chemical

Tags

NGSS.MS-PS1-2

In a chemical reaction, 4 grams of sodium must combine with how many grams of chlorine to produce 10 grams of table salt?

• 4 grams

• 6 grams

• 8 grams

• 10 grams

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

NGSS.MS-PS1-1

A 500-gram block of solid cheese is melted in a pot. Which is most likely the mass of the cheese after it is melted?

• 500 grams, because the cheese does not gain or lose mass just because it was melted
• 499 grams, because some of the cheese evaporates as it melts
• 502 grams, because the cheese absorbs heat as it melts

Tags

NGSS.MS-PS1-5