Answer:Sodium ions
Explanation:
The membrane potential of most cells is negative, when sodium ions enters the cells, it can reverse the polarity and makes it positively charge.
The real thing is reaallly tiny, you won't be able to view it with a microscope. that's why models are used to study atoms.
Answer:
slowly
Explanation: because if it is fast it started to get active and when it is colder it is slower
Answer:
<em>The atmosphere provides the geosphere with heat and energy needed for rock breakdown and erosion</em>