WorksheetsElements, mixtures and compounds
Total questions: 22
Worksheet time: 12mins
Salt Water can be classified as:
Element
Compound
Heterogeneous Mixture
Solution
Which contains only elements?
A
B
C
D
Which contains a pure substance? (Choose all)
A
B
C
D
Which is a heterogeneous mixture? (Choose all)
1
2
3
4
Which is the best example of a pure substance?
pizza
gold
saltwater
air
Earth’s air is made up of molecules of different gases that are not joined chemically. Which term best describes air?
compound
mixture
pure substance
element
Brass is a metal that is bright red and gold. It is formed by combining, not chemically, two elements, zinc and copper. Based on the information, how would brass be classified?
an element
compound
mixture
suspension
Which is the best example of a mixture?
a brick of pure gold
the distilled water in a bottle
the salt water in the ocean
the helium in a balloon
Which term describes the substance that forms when two or more types of atoms join?
element
compound
composite
mixture
Structural differences between different chemicals can be represented in models of the particles. Which drawing BEST represents a compound?
Picture A
Picture B
Picture C
Picture D
A scientist tests a water sample that was collected from a river. The results of the test are described below:
-The water is clear
-The water contains dissolved calcium
How should this water sample be classified?
As an element
As a compound
As a homogeneous mixture
As a heterogeneous mixture
Carbon is a(n) ______
compound
element
mixture
