# Lesson 141: Safe uses of materials

🌱 SCIENCE (40 Lessons) • 🟡 C. Materials and Matter

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## Objective

I can name common materials like glass, metal, plastic, wood, and water. I can tell safe ways to use these materials and say what we should not do around things that are sharp, hot, or easy to break.

## Materials

- Safe classroom or home objects (plastic cup, wooden spoon, metal spoon, soft toy)
- Pictures of glass bottles, windows, scissors, hot pans, cleaning bottles
- Paper for drawing a simple safety poster
- Pencil, crayons, or markers

## Mini-lesson — Using materials safely

We are surrounded by different materials. Materials are what things are made of. Some materials are soft and safe to touch. Some can be sharp, hot, or easy to break, so we must use them carefully.

Common materials

- Glass — windows, jars, cups.
- Metal — spoons, keys, pans, scissors.
- Plastic — bottles, toys, containers.
- Wood — tables, chairs, rulers, doors.
- Water — in sinks, bottles, puddles, and tubs.

Safe and unsafe uses

- Glass can break into sharp pieces. We do not touch broken glass. We call an adult.
- Metal pans and kettles can get very hot. We do not touch them without an adult.
- Scissors are sharp metal. We only use them with adult rules and pass them handle first.
- Water is useful for washing and drinking. But we never leave small children alone near deep water.
- Cleaning liquids and sprays are for adults. We do not drink them or play with them.

Simple safety rules

- Look before you touch.
- Ask an adult if you are not sure.
- Walk slowly when carrying glass or water.
- Keep sharp or hot things away from your face and body.
- Clean up small spills quickly so people do not slip.

Safe use of materials helps us enjoy our homes and classrooms without getting hurt.

Picture strip: Safe and unsafe actions

Carrying carefully

Call an adult

## Guided Practice — Look at objects and talk about safety

You will look at real objects or pictures and talk about how to use them safely. Use simple words to say what is safe and what is not.

1. Gather objects: With an adult, choose safe objects like a plastic cup, metal spoon, wooden spoon, and soft toy. Use pictures for glass and cleaning bottles.
2. Name the material: For each object ask, "Is this glass, metal, plastic, wood, or water?"
3. Ask about safety: Say, "How do we use this safely?" For example, "We drink from the glass cup but do not run with it."
4. Talk about unsafe ideas: Think of one unsafe thing, like running with a glass bottle, then explain why it is unsafe.
5. Make a rule sentence: For each object, say one rule, such as "Walk with glass" or "Do not touch hot pans".
6. Use the tracing pad: Choose words like glass, metal, plastic, or safe from the dropdown and trace them slowly. Say the word as you write.
7. Finish with a sentence: Write one sentence such as "Glass can break, so we walk with it" or "Scissors are sharp, so we cut only paper".

Tracing Pad
Lines
Trace
Pen

## Practice 1 — Safe or unsafe?

Read or listen to each action. Decide if it sounds safe or unsafe. Explain why.

1. Running while holding a glass bottle.
2. Walking slowly with a plastic cup of water.
3. Touching a hot metal pan on the stove.
4. Putting scissors back in the pot or box after using them.
5. Drinking from a clean glass or plastic cup.
6. Playing with cleaning sprays like they are toys.

Make two columns on your paper: "Safe" and "Unsafe". Write each action in the correct column and add a few words like "could cut" or "walks slowly".

## Practice 2 — Materials in my home or classroom

Look around your home or classroom. Find a few objects and think about what they are made of and how to use them safely.

1. Choose three to five objects, such as a cup, chair, window, book, and toy.
2. For each object, write its name and what it is made of (glass, metal, plastic, wood, or mixed).
3. Next to each one, write one safety rule. For example: "Glass window — do not push or hit" or "Wooden chair — sit properly, do not stand on it".
4. Share your list with an adult and ask if they have more safety rules for those objects.

## Practice 3 — Design a safety poster

Create a simple safety poster about using materials safely.

1. At the top of your paper, write a title such as "Safe Uses of Materials" or "Stay Safe with Glass and Metal".
2. Draw two or three pictures that show safe actions, like walking with a glass or putting scissors away.
3. Under each picture, write a short rule sentence, such as "Walk with glass" or "Ask an adult for help".
4. Color your poster and hang it in a place where you will see it and remember the rules.

## Quick Check — Safe uses of materials

Answer each question about materials and safety. Think about what things are made of and how we should use them.

1) Which of these is a material?

Running. Singing. Glass.
Glass is a material that things like windows and cups are made of.

2) A spoon is usually made of…

Paper. Metal or plastic. Clouds.
Spoons are often made of metal or plastic.

3) Why can broken glass be dangerous?

It has sharp pieces that can cut us. It makes nice music. It turns into a soft pillow.
Broken glass has sharp edges that can cut skin.

4) What should you do if you see broken glass on the floor?

Pick it up with your hands. Kick it to your friend. Tell an adult right away.
Never touch broken glass. Ask an adult to clean it up safely.

5) A metal pan on the stove is often…

Very cold. Very hot. Made of paper.
Metal pans on the stove can get very hot and should only be touched by adults.

6) What is a safe rule for using scissors?

Cut only paper and walk, do not run. Run while cutting in the air. Throw them to your friend.
We cut only on the table, walk slowly, and pass scissors handle first.

7) Which material is usually used for windows?

Bread. Cloth. Glass.
Windows are usually made of glass.

8) Which is a good safety rule about water?

Play alone in deep water. Stay with an adult near deep water. Drink any water you find in a bottle.
We stay with an adult near deep water and only drink clean water given by a trusted adult.

9) Cleaning liquids and sprays are usually for…

Adults to use carefully. Children to play and drink. Making snacks.
Cleaning liquids are not for children to touch or drink. Adults use them safely.

10) Why should we clean up water spills on the floor?

To make the floor shiny. To make more puddles inside. So people do not slip and get hurt.
Wet floors can be slippery and cause falls.

11) Which action is safe with a glass cup?

Throw it in the air. Hold it with two hands and walk. Kick it like a ball.
Walking slowly and holding a glass with two hands is safer.

12) A wooden chair is made of wood. What is a good safety rule?

Sit on it properly, do not stand and jump. Climb on the back and rock it. Drag it loudly across the room.
We sit properly on chairs so they do not tip over.

13) If you are not sure if something is safe to touch, what should you do?

Touch it quickly and see. Ask an adult first. Lick it.
We always ask an adult if we are not sure something is safe.

14) Which picture would best match the words "unsafe use of materials"?

A child walking with a plastic cup. A child sitting and drawing at a table. A child running with open scissors in hand.
Running with scissors is an unsafe use of a sharp material.

15) Why do we learn about safe uses of materials?

To stay safe and not get hurt by everyday objects. So we can break more things. To make extra messes for adults.
Learning safety rules helps us enjoy materials without getting hurt.

## Assessment (parent/teacher)

Student can name common materials such as glass, metal, plastic, wood, and water. Student can describe safe ways to use or carry everyday objects made from these materials. Student can explain why broken glass, sharp scissors, or hot pans can be dangerous. Student can suggest simple safety rules for home or classroom materials. Student can answer worded questions about safe and unsafe actions with a short explanation.

## Exit ticket (student)

😀 I can explain how to use materials like glass, metal, and water safely. 🙂 I know some safety rules but still need more practice. 😅 Safety rules for materials still feel a bit tricky to remember.

#### Next time I will practise…

Naming what materials everyday objects are made of Saying safe and unsafe actions with objects Making and reading simple safety posters
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