Science project ideas for class 9

Here are 50 science project ideas that apply the scientific method across different fields like biology, chemistry, physics, and environmental science.

Each project involves forming a hypothesis, conducting experiments, gathering data, and drawing conclusions.

Biology

1. Effect of Light on Plant Growth – Hypothesize how different light conditions affect plant growth rates.
2. Does Music Affect Plant Growth? – Test if plants exposed to music grow differently than those in silence.
3. Do Different Types of Water (Tap, Distilled, Saltwater) Affect Seed Germination? – Test how various water types impact plant seed germination.
4. Do Ants Prefer Sugar or Protein-Based Foods? – Experiment with different food types to see which ants prefer.
5. How Does pH Level Affect Yeast Growth? – Investigate how acidity/alkalinity impacts yeast fermentation rates.
6. Do Plants Grow Faster in Soil or Water? – Compare plant growth in hydroponics versus traditional soil.
7. Effect of Temperature on the Rate of Fruit Ripening – Test how different temperatures affect the ripening process of fr
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