How do you know if something is alive?
How can you remember all the things that living things must be able to do?
That's easy! Just remember Mrs. Nerg!
If something is alive, it must be able to do all of these seven things
For example, below is a video showing how plants will move and grow towards light, which they need to make their own food. This shows that they can MOVE, GROW/DEVELOP and SENSE something and respond to it. The plant is sensing where the light is, so it is moving in that direction so that grow/develop with the food that it makes from the sunlight (NUTRITION FOR ENERGY).
Here are videos of some unicellular organisms that are SENSING where food (the stiumlus) is and responding MOVING towards it (NUTRITION FOR ENERGY). They need these nutrients to GROW/DEVELOP.
We will study these unicellular organisms more in-depth in a few months.