Unit 4: Chemical and Physical Properties and Changes

A compound can have different physical and chemical properties than the elements that make it up.

• True
• False

Which of the following is an element?

• H2O
• CaCO3
• Ca
• CO

All of the following are physical changes EXCEPT-- 

• breaking
• frying an egg
• freezing
• boiling

H-O-H -- 

•  is made of 2 elements (hydrogen and oxygen) and is an element.
• is made of 3 elements (hydrogen, oxygen, and hydrogen) and is an element
• is made of 2 elements (hydrogen and oxygen) and is a compound.
•  is made of 3 elements (hydrogen, oxygen, and hydrogen) and is a compound.

All of the following are chemical reactions EXCEPT-- 

• dissolving
• baking cupcakes
• burning a log
• iron rusting

A compound -- 

• cannot be broken down into a simpler form.
• is the same as an element.
• is in its simplest form already
• is made of two or more elements

An element -- 

• is the same as a compound.
• cannot be broken down into a simpler form.
• can be broken down into a simpler form.
• is made of two or more atoms.

How many elements are in CuCO3? 

• 1
• 3
• 4
• 2

Which of the following is a compound? 

• hydrogen
• _H2O
• H2
• Ca

Which of the followingis not evidence of a chemical change? 

• breaking
• sound
• heat 
• light