Ps1

Which of the following is the BEST clue that a chemical change has occurred?

• the substance is smaller after the change

• the substance forms bubbles when the change occurrs

• the substance looks the same as it did before the change

Tags

NGSS.MS-PS1-2

When does a physical change occur?

• when molecules combine to form a compound

• when a new element is created

• when the size, shape or state of matter changes

• when elements combine to form a molecule

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Stepping on a bag of potatoe chips would cause which type of change?

• mechanical

• chemical

• thermal

• physical

physical changes can be reversed.

• True

• False

List the steps of the scientific method

d

e

f

c

b

a

Form a hypothesis

Analyze results

Conduct experiment

Draw conclusions

Ask a question

Communicate results

Identify an example of each of the three states of matter present when the candle is burning.

• The fire/flame

• Gas

• The melting wax

• Liquid

• The hard wax of the candle

• Solid

Tags

NGSS.MS-PS1-4

The diagram shows water particles in three different phases.

On a summer day, water particles from the ocean change phase as they move into the air. Which of the following models best shows this process?

• 
• 
• 
• 

Tags

NGSS.MS-ESS2-4

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What conclusion should Veronica make from her observations?

• The masses of the water and the ice were both 43 grams, so the amount of matter did not change.

• The masses of the water and the ice were both 153 grams, so the amount of matter did not change.

• Some of the water spilled because the mass of liquid water should have been greater than the mass of solid ice.

• There was an error in weighing the ice because the mass of liquid water should have been less than the mass of solid ice.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A glass of ice water is placed on a table inside a room that is at room temperature. The ice inside the glass melts. The diagram represents the changes observed. Which piece of evidence supports the conservation of matter during the changes shown in the diagram?

• The contents of the glass are wet before and after the ice melts.

• The combined mass of the glass and its contents is the same before and after the ice melts.

• The combined mass of the glass and its contents is less after the ice melts.

• The contents of the glass are colorless before and after the ice melts.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Andrew designs an investigation to test how temperature affects the formation of a solution. He mixes the same amounts of sugar to water at different temperatures. Andrew creates the chart shown to record the results. Andrew will know that a solution has formed when what happens to the liquids?

• when the liquids give off an odor

• when the sugar in the liquids dissolves

• when the masses of the liquids are reduced

• when a solid substance appears in the liquids

Tags

NGSS.MS-PS1-2