What can scientists conclude after discovering trilobites? All early organisms were found in the ocean because they needed oxygen.
Most early organisms were smaller in size.
Most early organisms needed sunlight to survive.
All early organisms were carnivores.

Can someone me with questions 12 and 13 plz.

How does the motion of particles in a gas change as the gas cools

Need what is special about water as a compound? how does water regulate climate? what drives water evaporation?   why is the water vapor fresh water when it rises from the ocean? why might freshwater in the form of snow take longer to enter the water cycle again than liquid precipitation?   what is an aquifer? what role do people play in the water cycle? plz just answer as many as you can ! thx if you !