WorksheetsPure Substances & Mixtures (SC.8.P.8.9 & SC.8.P.8.8)
Total questions: 20
Worksheet time: 15mins
A magnet was placed near a pile that contained both iron and sulfur. As it neared the pile, the magnet started attracting small pieces of iron from the pile. Which of these statements best describes the contents of the pile?
It is a solution of iron and sulfur that can be separated by magnetism.
It is a suspension of sulfur in iron that can be separated by magnetism.
It is a heterogeneous mixture of iron and sulfur that can be separated by magnetism.
It is a compound of iron and sulfur that can be separated by magnetism.
Which of these common substances is a homogeneous mixture?
Maple syrup
Pure water
Table salt
Liquid iron
Sodium hydroxide, a compound commonly found in drain cleaners, has a pH of 13. Which of these phrases describes sodium hydroxide?
Highly basic
Slightly basic
Slightly acidic
Highly acidic
Which of these substances is a compound?
Potassium
Helium
Trail mix
Methane
Which would you claim is the best set of tools to use for separating a mixture of water, sugar, and pebbles?
a filter and a magnet
a filter and a hot plate
a magnet and a hot plate
a setting tank and a filter
The model shows some properties of several materials. Which of the following is the most acidic?
Soap
Floor cleaner
Orange juice
Acid rain
Students mix salt and water together. After these substances are mixed, what would be the best way to separate the component parts?
Shake it through a series of mesh sieves, because the particle sizes are different.
Perform a distillation, because the water will boil off, leaving the salt behind.
Place the beaker in a bowl of ice, because cooling the solution will cause the salt to melt away.
Use a strong magnet, because the ions in the salt will be attracted to them but the water will not.
Students classify various samples into two groups as shown in the chart. Which describes how these samples were classified?
Group A is elements; Group B is mixtures
Group A is mixtures; Group B is solutions
Group A is pure substances; Group B is mixtures
Group A is compounds; Group B is mixtures
C6H12O6 is the chemical formula for glucose, a type of sugar. Which statement is true about glucose?
Glucose is a compound because it is made of more than one element
Glucose is a compound because it is made of protons, neutrons, and electrons
Glucose is an element because it can be separated into smaller components
Glucose is an element because it is made up of only one type of atom
What is the term for a substance that is made up of only one type of atom?
Pure Substance
Element
Compound
Mixture
Which of the following is NOT a compound?
Water
Neon
Ammonia
Carbon Dioxide
Which of the following is NOT a property of an acid?
Conducts electricity
Corrosive
Sour Taste
Slippery to touch
Jayne placed an eyedropper of cabbage juice in a sample of an unknown and it turned green. In another test, the sample was slippery to the touch. Is this an acid or a base?
Acid because it is slippery to the touch
Base because it is slippery to the touch
Acid because it is slippery to the touch and turned green
Base because it is slippery to the touch and turned green
Wes has an acidic solution with a pH of 4.5. What type of compound should he add to his solution to produce a solution with a pH of 7?
an acid
a base
a neutralizer
an indictator
Explain the difference between a pure substance and a mixture.
A pure substance is made of only one type of matter and a mixture has many.
A pure substance can be physically separated and a mixture cannot.
A pure substance consists of elements and a mixture consists of compounds.
A pure subtance cannot be separated physically but a mixture can.
A Dairy Queen Oreo blizzard is an example of ...
an element
a compound
a homogeneous mixture
a heterogeneous mixture
A glass of chocolate milk is an example of ...
an element
a compound
a homogeneous mixture
a heterogeneous mixture
Which one is NOT a property of a base?
Conducts electricity
Slippery to the touch
Sour taste
Corrosive
When an acid and a base cancel each other out, they form a ...
pH solution
stronger acid
a salt
a mixture
What do you call the substance that changes colors in the presence of an acid or a base?
indictator
neutralizer
acid
base
