When hockey players push the puck along the ice it slides causing heat which melts the ice causing the friction against the ice to be less.
The second one since you’re changing the soil up by adding different fertilisers. This will be you’re independent variable. And you’re dependent variable is your result = the plant height .
Hope this helps :)
The earth axis to tilt and orbits the sun
A).
It would decrease because the speed of sound and temperature are proportional.
