Chalk

Audrey Holland

Chemical name

Calcium carbonate

Chemical formula

CaCO3

3 uses of chalk

1. Removing grease stains

2. Keeping a closet must-free

3. Sanding surfaces evenly

3 physical or chemical properties of the chemical

1. physical- the texture is hard and dusty

2. chemical-chalk has no malleability

3. physical- usually white

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Facts about chalk

1. Chalk has been used for drawing since prehistoric times

2. Chalk was first formed into sticks for the convenience of artists

3. Chalk did not become standard in schoolrooms until the 19th century, when class sizes began to increase and teachers needed a way to convey info to more than one student at a time.