Skip to content
Exit presentation

Track Zero: Getting Ready for Science

Living, or not?

Is a dry rajma seed alive? It does not move in your hand.

Loading lab…

The idea

Yes, a dry rajma seed is alive, but it is resting.

Living things usually show four signs.

  • They grow and become bigger.
  • They need energy. Animals eat food. Plants make food from sunlight.
  • They respond to what is around them.
  • They reproduce — they make more of their own kind.

A stone or a steel spoon shows none of these signs.

Watch out!

A seed that shows none of the signs may still be alive. Dry rajma is resting. A seed needs water to start growing. Soak it and it swells, then sprouts.

Jump to lesson

This track

  1. 0 Start here
  2. 1 Looking closely
  3. 2 Measuring fairly
  4. 3 Solid, liquid, or gas?
  5. 4 Hot, cold, or just used to it?
  6. 5 Why day turns into night
  7. 6 Living, or not?
  8. 7 The big picture
  9. 8 Track quiz

Other tracks