Physical and Chemical Changes

In which of the following actions does a physical change occur to separate a mixture?

• stirring chocolate syrup into milk

• evaporating water from salt water

• freezing a solution of water and sugar

• adding sand to a beaker of water

Tags

NGSS.MS-PS1-2

In which of the following examples is a mixture separated by using physical properties?

• making freezing coffee by using heated water

• freezing juice to make flavored ice

• using a filter to get the sand out of a puddle of water

• stirring water and salt to make salt water

A mixture of sand and gravel can be separated by putting in a container with holes only the sand can pass through. This method works to separate the mixture because sand and gravel differ in which physical property?

• color

• state

• size

• weight

Which of the following means to make different without changing what the material is made of, such as cutting, folding, melting?

• change

• manipulation

• physical change

• mixture

• substances

Tags

NGSS.MS-PS1-2

Which of the following means a combination of two or more substances where each keeps its own properties and can be easily separated?

• change

• manipulation

• physical change

• mixture

• substances

Which of the following means particular types of matter with specific properties?

• change

• manipulation

• physical change

• mixture

• substances

Which of the following means moving or changing the position of an object?

• change

• manipulation

• physical change

• mixture

• substances

Tags

NGSS.MS-PS2-2

Which of the following means to make different?

• change

• manipulation

• physical change

• mixture

• substances

Students heat a white solid in a test tube over a flame. What observation would tell the students that the solid has become a new substance?

• The temperature of the solid increases from the flame.

• The color of the solid changes to amber.

• The solid begins to melt within the test tube.

• The solid is in the form of crystals.

Tags

NGSS.MS-PS1-2

A liquid and a solid are combined to form a mixture. Which procedure would most likely produce evidence that a chemical change occur?

• Observe the color both of the liquid and the solid before mixing

• Measure the volume of the mixture after the components were combined

• Determined the time it took for the liquids to combine completely

• Record the temperature of the substances before and after mixing

Tags

NGSS.MS-PS1-2