Mixtures and Pure Substances Worksheet
Explore the fundamental concepts of mixtures and pure substances with this Grade 7 science worksheet, covering elements, compounds, homogeneous, and heterogeneous mixtures.
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Mixtures and Pure Substances
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Read each question carefully and provide your answer in the space provided. Good luck!
1. Which of the following is an example of a pure substance?
Saltwater
Air
Gold
Sand and water
2. A mixture where the components are evenly distributed and difficult to distinguish is called a:
Heterogeneous mixture
Homogeneous mixture
Compound
Element
1. All compounds are pure substances.
True
False
2. Air is a pure substance.
True
False
1. A substance that cannot be broken down into simpler substances by chemical means is called an .
2. When two or more substances are combined but not chemically bonded, they form a .
3. Water (H₂O) is an example of a .
Match each term on the left with its definition on the right.
1. Element
a. A substance made of two or more elements chemically combined.
2. Compound
b. A pure substance consisting of only one type of atom.
3. Heterogeneous Mixture
c. A mixture where components are not uniformly distributed.
4. Homogeneous Mixture
d. A mixture where components are uniformly distributed.
1. Explain the difference between a homogeneous mixture and a heterogeneous mixture, providing an example of each.
2. How can you separate the components of a mixture?