Elements, Compounds, and Mixtures
Explore the fundamental concepts of elements, compounds, and mixtures with this comprehensive Grade 7 science worksheet, covering definitions, examples, and classification.
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Elements, Compounds, and Mixtures
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Read each question carefully and answer to the best of your ability. Good luck!
1. Which of the following is a pure substance made up of only one type of atom?
Compound
Mixture
Element
Solution
2. Which of the following can be separated by physical means?
Water (H2O)
Saltwater
Carbon dioxide (CO2)
Oxygen (O2)
3. A(n) is a substance formed when two or more chemical elements are chemically bonded together.
4. The smallest unit of an element is called a(n) .
5. A heterogeneous mixture is one where the components are distributed.
6. Air is an example of a homogeneous mixture.
True
False
7. Compounds can be separated into their elements by physical methods.
True
False
8. Explain the difference between an element and a compound, providing an example for each.
9. Describe what makes a mixture homogeneous or heterogeneous.
Match each term on the left with its correct description on the right.
10. Element
a. Two or more substances physically combined
11. Compound
b. Pure substance made of one type of atom
12. Mixture
c. Two or more elements chemically bonded