Water is the only substance on Earth that occurs naturally as a solid, liquid and gas. In a paragraph, explain how this is possible.

It is possible for liquids (water) to turn into solids because when liquid (water) is cooled to its Freezing point the particles lose so much energy that it can no longer move around each other and the liquid becomes solid. Example : Ice

A liquid can turn into a gas over a range of temperature without boiling by a process called Evaporation . In this process some of the liquid at the surface changes into gas and mixes with the air. It happens because the particles have different amounts of energy and those with most energy move the fastest.

Sorry if it's to confusing, but hopes it helps :D

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?

definition

                    entropy is a measure of the randomness or the extent of disorder of a chemical process.

                      enthalpy is a measure of the heat change of a reaction occurring at a constant pressure.

measurement units:

                        entropy is measured in joule per kelvin (jk⁻¹)   whereas enthalpy is measured in joule per mole (jmol⁻¹)

requirements:

                            entropy has no requirements or limits, and its change is measured by the division between the heat change of the chemical process and the temperature.

                              in contrast, enthalpy can only be related to the heat change of the reaction under standard conditions.