Which of the following is a physical change? Select one: a. solid dry ice changing to a gas b. digesting a meal c. baking a cake d. fermenting grapes to produce wine e. a tomato ripening

Option A

Explanation:

In a physical change, physical characteristics such as shape, mass, volume, state, phase etc. changes while in a chemical change one substance convert into entirely different substance which may or may not be converted to its original form. Of all the given options, option A represents a physical change. In option A the phase of the substance has changed from solid to gas.

succession returns a disturbed

ecosystem to a more stable state. this is also classified into two (2) types:

primary succession and secondary succession. the primary succession arises when

a new land is transformed and a bare rock has been exposed providing an environment

that can be occupied for the first time. while, secondary succession occurs

when a previously occupied environment was disturbed that kills much of all its

community

explanation: