Unit 4 Review: Elements/Compounds And Physical/Chemical Properties And Changes Question Preview (ID: 33292)


Review Of Elements And Compounds And Physical And Chemical Changes And Properties. TEACHERS: click here for quick copy question ID numbers.

Add vinegar to baking soda, and it begins to bubble. This is evidence that --
a) a physical change is happening
b) vinegar is an element that is being broken down
c) baking soda is a compound and cannot be broken down
d) a chemical change is happening and a new substance is being formed.

A precipitate (solid formed by mixing two liquids) is formed during a--
a) chemical change which formed a new substance.
b) physical change which formed a new substance.
c) physical change in which a new substance was not formed.
d) chemical change in which a new substance was not formed.

Which of the following is an example of what might occur during a chemical change?
a) melting
b) breaking
c) bubbling
d) dissolving

Blowing bubbles into your milk through a straw causes a ____________________ change.
a) chemical
b) physical
c) organic
d) elemental

Bubbles formed as a result of mixing two chemicals is an example of _________________change.
a) physical
b) chemical
c) organic
d) elemental

A precipitate, a type of chemical change, is a solid formed by mixing--
a) two solids.
b) a solid and a liquid.
c) two liquids.
d) a liquid and a solid.

A compound can have different physical and chemical properties than the elements that make it up.
a) true
b) false
c)
d)

Which of the following is an element?
a) Ca
b) CO
c) CuCO3
d) H2O

Which of the following is a compound?
a) H2
b) Ca
c) H2O
d) Hydrogen

Which of the following is evidence of a physical change?
a) heat
b) light
c) sound
d) breaking

An element --
a) is made of two or more atoms.
b) can be broken down into a simpler form.
c) cannot be broken down into a simpler form.
d) is the same as a compound.

How many elements are in CuCO3?
a) 3
b) 1
c) 2
d) 4

A compound --
a) is made of one element.
b) cannot be broken down to a simpler form.
c) can be broken down into a simpler form.
d) is the same as an element.

H-O-H --
a) is made of 3 elements (hydrogen, oxygen, and hydrogen) and is an element.
b) is made of 2 elements (hydrogen and oxygen) and is a compound.
c) is made of 2 elements (hydrogen and oxygen) and is an element.
d) is made of 3 elements (hydrogen, oxygen, and hydrogen) and is a compound.

All of the following are chemical reactions EXCEPT--
a) baking cupcakes.
b) burning a log.
c) iron rusting.
d) dissolving.

All of the following are physical changes EXCEPT--
a) frying an egg.
b) boiling.
c) freezing.
d) breaking.

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