Grade 8 Science: Understanding Mixtures
This worksheet covers different types of mixtures, their properties, and methods of separation, aligned with Grade 8 science standards.
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Grade 8 Science: Understanding Mixtures
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Read each question carefully and answer to the best of your ability. Show all your work for calculations.
1. Which of the following best describes a mixture?
Two or more substances chemically combined.
Two or more substances physically combined.
A pure substance that cannot be broken down.
A substance with a fixed chemical composition.
2. Which type of mixture has components that are uniformly distributed and cannot be easily distinguished?
Heterogeneous mixture
Homogeneous mixture
Compound
Element
1. A is a heterogeneous mixture in which solute particles are large enough to settle out.
2. In a solution, the substance that dissolves is called the , and the substance that does the dissolving is called the .
3. The process of separating an insoluble solid from a liquid by passing it through a filter is called .
1. All mixtures are solutions.
True
False
2. Distillation is a method used to separate components of a solution based on differences in their boiling points.
True
False
1. Describe the main difference between a homogeneous mixture and a heterogeneous mixture, and provide an example of each.
2. Explain how you would separate a mixture of sand and iron filings. What properties of the substances allow for this separation?
Match each term on the left with its correct definition on the right.
1. Solution
a. A heterogeneous mixture with particles that settle over time.
2. Suspension
b. A homogeneous mixture of two or more substances.
3. Colloid
c. A heterogeneous mixture with particles that are dispersed but do not settle.