WorksheetsPure substances and Mixtures Questions
Total questions: 14
Worksheet time: 7mins
What are the two main categories into which matter can be classified?
Elements and Compounds
Pure substances and Mixtures
Homogeneous and Heterogeneous
Metals and Nonmetals
A pure substance is a type of matter that has a ______ composition and distinct properties.
fixed
variable
random
changing
Which of the following is an example of an element?
Water (H2O)
Table salt (NaCl)
Oxygen (O)
Carbon dioxide (CO2)
Elements are the simplest pure substances.
True
False
Compounds can be broken down into their elements only by ______ means, not by physical processes.
chemical
mechanical
physical
magnetic
Which of the following is a compound?
Iron (Fe)
Gold (Au)
Water (H2O)
Hydrogen (H)
A mixture is a combination of two or more substances that are not ______ combined.
chemically
physically
mechanically
visually
Homogeneous mixtures are also called ______.
solutions
compounds
elements
colloids
What is an example of a homogeneous mixture?
Salad
Sand and iron filings
Salt water
Trail mix
A heterogeneous mixture is one in which the composition is not uniform throughout.
True
False
Fill in the blank: Pure substances are made up of only one kind of particle, either an _______ or a _______.
element, compound
atom, molecule
mixture, solution
solid, liquid
Which of the following is NOT an example of a heterogeneous mixture?
Salad
Air
Trail mix
Muddy water
The main difference between pure substances and mixtures is:
Pure substances have a fixed composition, while mixtures consist of two or more substances physically combined.
Pure substances are always liquids, while mixtures are always solids.
Mixtures have a fixed composition, while pure substances do not.
Pure substances can be separated by physical means, while mixtures cannot.
Mixtures can be separated into their individual substances by physical methods such as filtration, distillation, or evaporation.
True
False
