1. Life
What is it?

2. Life on Mars
Scientists have been contemplating finding and establishing life on Mars
Our task:
What is life?

3. Look through pages 6-10 and answer the following
If an alien life form is discovered, how can you determine if it is alive?
When establishing life on Mars
what will need to be considered?

4. Class Answers
If an alien life form is discovered, how can you determine if it is alive?

5. Characteristics of Life
Organism is made of cells
Organism is organized
Cellstissuesorgansorgan systemsorganism

6. Characteristics of Life
Reproduction – make more of own kind
Growth and development –
changes throughout life in size
and structure

7. Characteristics of Life
Homeostasis – maintain a stable
internal environment
Adaptation – evolve changes
according to the environment

8. Characteristics of Life
Respond to stimuli – immediate reaction
Use energy – movement, getting food, respiration, transport, growth

9. References
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