8 IIPB SCIENCE STUDY GUIDE

A substance that is formed as the result of a chemical reaction is a __________________

• Product

• Reactant

• Starters

• Enders

Which of the following is an example of a chemical change?

• water freezes to form ice

• sugar dissolves in water

• gasoline burns in a car engine

• a piece of metal expands when it is heated

A change in the shape of an object is an example of _________________.

• a chemical change

• energy

• an endothermic change

• a physical change

Which of the following is an example of a chemical change?

• rusting of a bicycle
• painting a house
• washing a dog
• tearing up a newspaper

Which one shows that a chemical reaction has occurred?

• dissolving

• melting

• formation of a gas

• bending

What is the BEST definition of a chemical reaction?

• A change in matter that produces one or more NEW substances

• When two things combine and EXPLODE.

What does the number ₃ represent in 4NH₃?

• Subscript

• Superscript

• Coefficient

What does the number 4 represent in 4NH₃?

• Subscript

• Superscript

• Coefficient

How many Nitrogen (N) atoms are in 4NH₃?

• 4

• 1

• 3

• 12

How many Hydrogen (H) atoms are in 4NH₃?

• 4

• 1

• 3

• 12