Not every school has a science lab or budget for equipment. But science is everywhere. Experiments don't require Bunsen burners or test tubes. They require curiosity and careful observation.
- Water: Sink/float, mixing, separation, freezing, evaporation, surface tension
- Vinegar and baking soda: Chemical reactions, gas production, volcano, cleaning solutions
- Food colouring: Diffusion, absorption, colour mixing, chromatography
- Magnets: Magnetic and non-magnetic, poles, forces
- Blocks and ramps: Force, friction, motion, inclined planes
- Plants and seeds: Growth, photosynthesis, life cycles
- Ice, salt, sugar: States of matter, melting, dissolving, solutions
Safe, cheap, dramatic. Mix vinegar and baking soda. Gas production. Students observe, measure height of foam, test with different ratios. This teaches chemical reaction, variables, prediction, measurement. Cost: under $5.
Paper towel, water, food colouring. Let water absorb up paper. Colours separate. Teaches diffusion and properties of substances. Cost: paper, colouring, water.
Cardboard, books, a ball. Change the angle. Does the ball go faster? Further? Slower? Introduce variables: steepness, surface, weight. Cheap, hands-on physics.
Jar, soil, plants, water, observation over weeks. Students watch decomposition, plant growth, water cycle in miniature. Teaches biology without field trips.
Freeze water, salt water, sugar water. Which melts fastest? Why? What speeds up melting? This teaches states of matter and insulation. You need a freezer and ice.
Before any experiment: "What do you predict will happen? Why?" During: observe closely, measure if possible, draw or write what you see. After: compare prediction to result. This is the scientific method, resource-rich or poor.
