Unit 2: Heating Up Change Final Review

What does the Law of Conservation of Mass say about matter?

• Matter is destroyed in chemical reactions
• Matter is created in chemical reactions
• Matter is not created or destroyed in chemical reactions
• Matter can be created and destroyed in chemical reactions

In a chemical formula what does a coefficient represent?

• How many groups there are of the molecule
• How many atoms there are in the molecule
• What type of atoms there are in the molecule
• What kind of reaction there will be

A chemical equation is a short way of writing...

• a physical change
• a chemical property
• a physical property
• a chemical reaction

When balancing an equation you are only allowed to change...

• the coefficients
• the chemical symbols
• the subscripts
• all of the above

Which part of the below chemical equation represents the reactant?

• 
• 
• 
• 

What would be a physical property of a lemon?

• It is yellow
• It reacts with baking soda
• It is flammable
• It eventually rots and breaks down

What is a chemical property of a piece of paper?

• it is thin
• It can be different colors
• It can be folded into different shapes
• It is flammable

Which of the following would be an example of a physical change?

• Roasting marshmallows
• Carving of a pumpkin
• Frying of an egg
• Rusting of a bicycle

REACTIVITY and FLAMMABILITY would both be examples of...

• Physical Properties
• Physical Changes
• Chemical Properties
• Chemical Changes

Which of the following would represent a chemical change?

• Cutting a tomato
• A rusting bicycle
• Blending fruit
• Shattering glass