Environmental Studies · Class 5 · Things We Make and Do · Term 3

Everyday Science Experiments

Become a young scientist by conducting simple and fun experiments with things from your kitchen to understand concepts like floating, sinking, and dissolving.

TL;DR:Turn your classroom into a science lab with just a few kitchen items! This topic lets students become scientists for a day, exploring the amazing properties of everyday materials.

• CBSE Learning Outcomes
• NCERT EVS Curriculum Framework: Class V - Things We Make and Do

About This Topic

This topic, 'Everyday Science Experiments', is designed to foster a spirit of inquiry and scientific temper in young learners, aligning perfectly with the NCF's emphasis on 'learning by doing'. By using common household items, it demystifies scientific concepts and makes them accessible and relatable for Class 5 students. The core focus is on hands-on exploration of fundamental physical properties of matter. Students will investigate concepts like buoyancy and density through floating and sinking experiments, understand solubility by mixing various substances in water, and explore magnetism by testing different materials.

The pedagogical approach should be one of guided discovery. Instead of providing answers upfront, the teacher's role is to facilitate experiments, encourage students to ask questions, make predictions, and draw conclusions based on their own observations. This topic serves as a crucial foundation for more formal science education in later years, building essential process skills such as observation, classification, and inference. It connects directly to a child's immediate environment, showing them that science is not just in textbooks but all around them, from the kitchen to the playground.

Key Questions

1. Explain why some things float in water while others sink.
2. Compare what happens when you mix salt in water versus oil in water.
3. Analyse the results of an experiment to see which materials are attracted by a magnet.

Learning Objectives

• Predict and test whether common objects will float or sink in water.
• Classify substances as soluble or insoluble in water based on observation.
• Identify materials that are attracted to a magnet through experimentation.
• Record observations systematically in a table or notebook.
• Explain the results of their experiments using simple scientific terms.

Key Vocabulary

Float	To stay on the surface of a liquid, like water.
Sink	To go down below the surface of a liquid.
Dissolve	When a solid mixes completely with a liquid and seems to disappear.
Soluble	A substance that can dissolve in a liquid (e.g., salt in water).
Insoluble	A substance that cannot dissolve in a liquid (e.g., sand in water).
Magnet	An object that can pull certain types of metal, like iron, towards itself.
Density	How much 'stuff' is packed into a certain amount of space. Things that are less dense than water will float.

Watch Out for These Misconceptions

Common Misconception

All heavy things sink and all light things float.

What to Teach Instead

Floating and sinking depend on density, not just weight. A huge wooden log floats because it is less dense than water, while a tiny iron nail sinks because it is denser than water.

Common Misconception

When salt dissolves in water, it disappears forever.

What to Teach Instead

The salt does not disappear. It breaks down into tiny particles that are too small to see and spreads throughout the water. You can prove it is still there by tasting the water (with caution) or by evaporating the water to get the salt back.

Common Misconception

All shiny, metallic objects are attracted to magnets.

What to Teach Instead

Only certain metals, like iron, nickel, and cobalt, are strongly attracted to magnets. Many common metals, such as aluminium, copper, and silver, are not magnetic.

Active Learning Ideas

Experiential Learning

The Float or Sink Challenge

Provide each group with a tub of water and a tray of assorted items like a leaf, a coin, a plastic bottle cap, a pencil, and an eraser. Students predict whether each item will float or sink before testing it and recording the result.

30 min·Small Groups

Experiential Learning

Disappearing Act

Students are given glasses of water and small amounts of salt, sugar, sand, and oil. They observe what happens when each substance is stirred into the water, learning to differentiate between soluble and insoluble materials.

25 min·Pairs

Experiential Learning

Magnet Detectives

Give students a bar magnet and a collection of objects like a paper clip, a plastic ruler, an iron nail, a rubber, and an aluminium foil piece. They test each object to see which ones are attracted to the magnet and classify them accordingly.

20 min·Individual

Real-World Connections

• Making nimbu pani or Rooh Afza, where sugar dissolves in water.
• Understanding why we use life jackets (which are filled with light material) to float in water during boating.
• Seeing how magnets are used in fridge doors to keep them shut or in junkyards to lift heavy iron scrap.
• Observing how oil floats on top of dal or curry while cooking.
• Washing clothes, where detergent dissolves in water to clean the fabric.

Assessment Ideas

Quick Check

Use a 'Predict-Observe-Explain' worksheet where students first write their prediction, then record their observation during an experiment, and finally try to explain why it happened.

Quick Check

A short, picture-based quiz. For example, show a picture of a nail and a leaf next to a bucket of water and ask students to circle what will happen to each when dropped in.

Quick Check

Provide a simple checklist for students: 'I can tell if something will float or sink', 'I know the difference between salt and sand in water', 'I can find magnetic things with a magnet'.

Frequently Asked Questions

Why does a massive ship made of iron float, but a small iron key sinks?

A ship floats because of its shape. It is mostly hollow inside, filled with air, which makes its overall density less than water. The key is a solid piece of iron, which is much denser than water, so it sinks.

Why don't oil and water mix?

Oil is less dense than water, which is why it floats on top. Also, the particles of water are more attracted to each other than to particles of oil, so they don't mix together.

Can a magnet's power go through things?

Yes, a magnet's force can pass through many materials like paper, plastic, and glass. You can test this by placing a paper clip on a piece of paper and moving a magnet underneath it.