Understanding Mixtures and Solutions: A Science Worksheet for 15-Year-Olds

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Instructions

Read each question carefully and provide detailed responses. Use the space provided for answers.

Warm-Up Question

What is the difference between a mixture and a pure substance?


Multiple Choice

1. Which of the following is NOT an example of a mixture?
a) Air
b) Saltwater
c) Pure oxygen
d) Soil


2. Which term describes the substance that is dissolved in a solution?
a) Solvent
b) Solute
c) Mixture
d) Suspension


Short Answer

3. Give two examples of homogeneous mixtures and two examples of heterogeneous mixtures.
Homogeneous: ___________
___________
Heterogeneous: ___________
___________

4. What is the main difference between a solution and a suspension?


Long Response

5. Explain the process of chromatography and how it is used to separate mixtures. Be sure to include its practical applications.


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