Exploring Physical and Chemical Changes in a Virtual Lab

The video tutorial demonstrates various experiments to observe physical and chemical changes. It includes heating wax, burning a candle, and paper, reacting sodium chloride with silver nitrate, magnesium with hydrochloric acid, heating copper sulfate, and mixing iron with sulfur. Each experiment involves making observations before and after the process to determine the type of change that occurred.

What happens to the wax when it is heated over a Bunsen burner?

• It sublimates

• It melts

• It changes color

• It turns into a gas

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NGSS.MS-PS1-4

NGSS.MS-PS3-5

Is the transformation of the candle wax a physical or chemical change?

• Both

• Chemical change

• Physical change

• Neither

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NGSS.MS-PS1-2

NGSS.MS-PS1-4

What type of change occurs when paper is burned?

• No change

• State change

• Chemical change

• Physical change

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is observed when sodium chloride is shaken in water?

• It precipitates

• It dissolves

• It sublimates

• It changes color

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NGSS.MS-PS1-2

What happens when silver nitrate is added to the dissolved sodium chloride?

• No reaction

• Color change to blue

• A precipitate forms

• A gas is released

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NGSS.MS-PS1-2

What is observed when magnesium ribbon reacts with hydrochloric acid?

• It explodes

• Turns black

• It dissolves

• Bubbling and heat

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NGSS.MS-PS1-2

What color change occurs when copper sulfate is heated?

• No color change

• From gray to blue

• From white to blue

• From blue to gray

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NGSS.MS-PS1-2

What happens to the color of copper sulfate when water is added after heating?

• It turns pink

• It turns blue

• It remains gray

• It turns black

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NGSS.MS-PS1-2

What is the result of heating the iron and sulfur mixture?

• It sublimates

• It explodes

• It turns black and solidifies

• No visible change

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NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What type of change is observed when iron filings are separated from sulfur using a magnet?

• Physical change

• Chemical change

• Neither

• Both