20 Mixtures and Solutions
👩🏫 Teacher’s Guide
Objective
Students will compare mixtures and solutions and explain how to separate them with simple methods.
Vocabulary
mixture, solution, solvent, solute, filter, evaporate
Teaching Notes
- Start with a quick demo or model to visualize the concept.
- Pre-teach key vocabulary with gestures or sketches.
- Prompt students to predict, observe, and explain in full sentences.
- Check for understanding using either/or and short-answer prompts.
🧒 Student Worksheet
Concept and Helping Material
Definition. Mixtures keep parts visible or separable; solutions are uniform and can be separated by evaporation or other methods.
Helping ideas and samples:
- Try a quick sort, draw-and-label, or compare-and-contrast.
- Name one place you see this idea at home or at school.
- Safety: follow teacher directions and handle materials carefully.
Vocabulary and Definition
- — two or more substances together without changing identities
- — a mixture where one substance dissolves in another
- — the substance that does the dissolving
- — the substance that is dissolved
- — to separate solids from liquids using a barrier
- — to remove liquid as vapor
Words to Learn
, , , , ,
Sentences to Fill In
- Salt water is a __ of salt and water.
- In salt water, water is the __.
- In salt water, salt is the __.
- Sand and water make a __ you can filter.
- You can get salt back from salt water if you __ the water.
Hands-On Experiment or Activities
What You Need: simple classroom items.
What You Do: Separate it: mix sand and salt with water; filter out sand, then evaporate water to recover salt.
Think and Talk: What changed? What stayed the same?
Reflection
- Which step proved salt water is a solution and not just a mixture?
- Why did filtration work for sand but not salt?