What is the difference between physical and mechanical weathering.
(explain in 1-6 sentences)

Physical, or mechanical, weathering happens when rock is broken through the force of another substance on the rock such as ice, running water, wind, rapid heating/cooling, or plant growth. Chemical weathering occurs when reactions between rock and another substance dissolve the rock, causing parts of it to fall away. Hope this answer helps

Physical, or mechanical, weathering happens when a rock is broken through the force of another substance on the rock such as ice, running water, wind, rapid heating/cooling, or plant growth.

Explanation:

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.