Dont forget to answer what i know before moving on to

2. Don’t forget to answer What I Know before moving on to the other
activities included in the module.
3. Read the instruction carefully before doing each task.
4. Observe honesty and integrity in doing the tasks and checking your
answers.
5. Finish the task at hand before proceeding to the next.
6. Return this module to your teacher/facilitator once you are through
with it.
If you encounter any difficulty in answering the tasks in this module, do not
hesitate to consult your teacher or facilitator. Always bear in mind that you
are not alone.
We hope that through this material, you will experience meaningful learning
and gain deep understanding of the relevant competencies. You can do it!
References
This is a list of all sources used in
developing this module.

What I Need to Know
Earth is the only habitable planet that astronomers currently know of. It is
believed that the planetary system where it is located was formed from a
nebula around a protostar that later became the Sun.
In this module, you will be able to identify the factors that will give you a
better understanding of how Earth functions as a system to support life.
In this module, it includes:
 Lesson 1 – What Makes the Universe Unique?
After going through this module, you are expected to:
1.
Identify the factors that allows a planet to support life.
2.
Describe the features of planets which are not suitable for life.
3.
Create a concept map that is associated with the planet Earth.

What I Know
Direction: Read each sentence carefully. Encircle the letter of the correct
answer.
1. This zone in the Solar System is characterized by its distance from the Sun
where there is just the right amount of energy received to make the
temperature of a planet neither too hot nor too cold.