Which of the following is true regarding the atoms involved in a chemical reaction? 1.Some of the atoms will always be changed into a different type of atom by a chemical reaction.

2.Some of the atoms present before the reaction will always be lost during a chemical reaction.

3.During a chemical reaction, atoms will always be combined into much larger molecules.

4.The same number of each type of atom will always be present before and after a chemical reaction takes place.

when atmosphere interacts with biosphere they focuses on on the sources and sinks of green house gases (ghgs) air pollutants, particular matters, water and energy between the earth's surface and the atmosphere. the biosphere affects the climate. the atmosphere and biosphere are in constant interaction with each other, and all living things rely on gases in the atmosphere for life. organisms such as animals take in oxygen gas form the atmosphere to use in every cell of their body for smooth functioning of daily routine exercises.