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Show on a big screenA friend says, "The pond will dry up early this year."
How would you check that? This chapter shows how scientists think.
This is Chapter 1 of your Class 9 book, Exploration. Its name is Exploration: Entering the World of Secondary Science.
What you will learn
- A question worth asking — a prediction needs a question you can test.
- What a measurement carries — a number needs a unit.
- How close is close enough — a rough estimate can check an answer.
- A model is a tool — it keeps only the details that matter.
- One idea, many records — laws, theories and principles.
- The honest report — predictions can fail, and that helps science.
- Three strands, one method — the branches of science link up.
Quick catch-up
These help, though none is required.
- A guess you can test — it can turn out wrong.
- One agreed length — a unit means the same to everyone.
- A model that works — keep it while it explains.
One rule before this chapter
Every lab here is made up. No lab asks you to heat, mix or measure your own body.