Chemistry

The smallest particle of an element; made of electrons, protons, and neutrons

• Atoms

• Elements

• Molecules

• Products

The process by which one or more substances change to produce one or more different substances

• Chemical Process

• Reactant

• Chemical Reaction

A substance produced during a chemical reaction

• Product

• Reactant

• Properties

A substance that takes part in and undergoes change during a reaction

• Product

• Molecule

• Reactant

A new substance with unique chemical and physical properties that is formed when two or more elements are chemically bonded during a chemical reaction

• Product

• Compound

• Molecule

• Atom

_______________ is an example of both a color change and new substance produced from a chemical change with oxygen and metal.

• shredded paper
• rust (iron oxide)
• wood chips
• melted wax

A candle wick burning is an example of a _________________________

• physical reaction
• condensation
• neutrons
• chemical reaction

Which of these is NOT a sign that a chemical change has occurred? 

• Change in shape.
• An unexpected color change
• A temperature change
• The formation of a precipitate

You know that a chemical reaction has occurred if

• there is a precipitate (new solid)

• there is a color change.

• there is a temperature change.

• All of these answers are evidence.

What indicates a chemical reaction occurred?

• Heat or Light is released
  heat or light is produced
• gas (bubbles) produced
• color change
• all of the above