Class 7 science simulations

Chapter 2: Exploring Substances: Acidic, Basic, and Neutral

• pH Scale: Drip acid or alkali into water and watch the colour: how much does each drop change it?

Chapter 3: Electricity: Circuits and their Components

• Simple Circuits: Close the switch. What makes the bulbs brighter: more volts, fewer bulbs, or a different wiring?

Chapter 5: Changes Around Us: Physical and Chemical

• Combustion: Put a jar over a candle. Why does the flame go out, and when?

Chapter 7: Heat Transfer in Nature

• Heat Transfer: Bridge hot water and cold with a metal bar. Which metal carries heat best?

Chapter 8: Measurement of Time and Motion

• Simple Pendulum: Time one swing. What changes it: the string, the bob, or the push?

Chapter 9: Life Processes in Animals

• Cellular Respiration: Living things get energy from food. Does it make a difference whether they have oxygen?

Chapter 10: Life Processes in Plants

• Ecosystem Balance: Can plants and animals live for weeks in a sealed jar? Where does their oxygen come from?
• Photosynthesis: Plants make their food from light, water and carbon dioxide. Can we see it happening?

Chapter 12: Earth, Moon, and the Sun

• Earth's Seasons: Carry the globe round the lamp. Why is summer long and winter short?
• Solar & Lunar Eclipses: Line up the lamp, the globe and the Moon: why is there not an eclipse every month?

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