I think the answer is “greenhouse effect”
Streams carry sediment, like pebbles, in their flows. The pebbles can be in a variety of locations in the flow, depending on it's size, the balance between the upwards velocity on the pebble (drag and lift forces), and it's settling velocity.
I have one reason the reaction take place faster because the molecules are going at a faster pace because the temperature is rising
Non metals are all the way on the right side
Metalloids are the stair case
Metals are on the left side
