18 States of Matter
👩🏫 Teacher’s Guide
Objective
Students will compare solids, liquids, and gases by particle motion and shape/volume.
Vocabulary
solid, liquid, gas, particle, compress
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. Particles move least in solids, more in liquids, and freely in gases; this explains their shapes and volumes.
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
- — matter with fixed shape and volume
- — matter with fixed volume but changing shape
- — matter that changes shape and volume
- — tiny piece of matter
- — to press into a smaller space
Words to Learn
, , , ,
Sentences to Fill In
1. A rock keeps its shape because it is a __.
2. Water takes the shape of its container because it is a __.
3. Air fills a room because it is a __.
4. Matter is made of tiny __.
5. Gases can be squeezed because they can __ easily.
Hands-On Experiment or Activities
What You Need: simple classroom items.
What You Do: Balloon test: compare pressing a balloon of air (gas) vs. a sealed bag of water (liquid) and a rubber block (solid).
Think and Talk: What changed? What stayed the same?
Reflection
- Which state of matter was easiest to compress and why?
- Where do you see particles moving faster—hot tea or iced tea?