There used to be substantial water on Mars.
Living things are <u>interdependent </u>with each other and the environment.
Explanation:
Living things to grow, thrive, survive and reproduce are interdependent on each other and their surrounding environment. They depend on each other and the environment for basic requirements which support life like water, air, food etc.
The food cycle starting with the producers, consumers, decomposers and their interdependence with each other for energy production is a clear example for this. They are dependent on each other for reproduction and growth. They are dependent on the environment for living in their habitat and for raw materials for producing food.
It is a physical property because you aren't changing the actual thing, you are just changing its size. A chemical property is changing the arrangements of the atom to give you a totally new substance that cant be changed into its original form.<span />