Elements, Compounds and Chemical Changes

A bicycle left out in the rain starts to rust. Is rusting considered a physical or chemical change?

• Physical

• Chemical

• Mechanical

• Thermal

What happens, when a precipitate forms?

• When a precipitate forms, it will begin to bubble and fizz.

• When a precipitate forms, the color will change.

• When a precipitate forms, the temperature will change.

• When a precipitate forms, it will produce a solid.

Is an ELEMENT or COMPOUND composed of 2 or more different kinds of elements?

• element

• compound

Which of these is a chemical change?

• a statue being eroded by the wind

• water evaporating from a cup

• frying an egg

• feeling a rough cloth

What does a chemical change ALWAYS result in?

• A color change

• Fizzing or bubbling

• A new substance

• A new odor or smell

Is an ELEMENT or COMPOUND written using a chemical formula?

• element

• compound

Which of these is NOT a chemical change?

• Change in temperature

• Change in Color

• Change in State of Matter

• Creation of an aroma or smell

What elements are in the compound NaHCO3?

Write them in order.