Investigative World of Science Grade 8 Cheat Sheet

Key Definitions

• Observation: Using senses to gather information. ✅

• Hypothesis: A testable prediction based on observations. ✅

• Experiment: A procedure to test a hypothesis. ✅

• Variable: A factor that can change in an experiment. ✅

• Independent Variable: Changed by the experimenter. ✅

• Dependent Variable: Measured in response to changes. ✅

Important Concepts

Scientific Method

• Steps: Observation → Hypothesis → Experiment → Analysis → Conclusion ✅

• Reproducibility: Experiments should yield the same results when repeated. ✅

Types of Data

• Quantitative Data: Numerical information (e.g., measurements). ✅

• Qualitative Data: Descriptive information (e.g., colors, textures). ✅

Key Formulas

• Mass: Amount of matter in an object (grams).

• Volume: Space occupied by an object (cubic centimeters).

Speed = distance / time ✅

• Distance: How far an object travels (meters).

• Time: Duration of travel (seconds).

Common Mistakes to Avoid

Common Mistake: Confusing independent and dependent variables in experiments.

Memory Tricks

Tip: "H.O.E.A.C." — Hypothesis, Observation, Experiment, Analysis, Conclusion

Key Diagrams

      +------------------+
      |   Observation     |
      +------------------+
               |
               v
      +------------------+
      |     Hypothesis    |
      +------------------+
               |
               v
      +------------------+
      |    Experiment     |
      +------------------+
               |
               v
      +------------------+
      |     Analysis      |
      +------------------+
               |
               v
      +------------------+
      |    Conclusion     |
      +------------------+