Rough and smooth ER is the two kinds
Hi lovely! Here are your scientific questions that are testable:
Does the type of liquid affect how fast an ice cube melts?
Does changing the temperature of water affect the buoyancy of an egg?
Does the thickness of the wire affect the power of the circuit?
Hope I helped!
The element has about 47 protons
Im not 100% sure but the best answer I can give is Prokaryotes because they came to be around the time oxygen did as well.
because you never know when ur gonna need it
