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