What processes lead to glacial erosion? describe them.

There are three main processes that causes glacial erosion

a) Plucking

b) Abrasion

c) freeze and thaw

Explanation:

There are three main processes that causes glacial erosion

a)Plucking - In this the rocks at the base of glacier gets frozen and thus they stick to the ground. Now when the glacier starts moving, it plucks the rock from the ground. This process of eroding the frozen rocks at the base by the glaciers is called plucking.

b)Abrasion – Abrasion occurs when the plucked rocked by the glacier rub against the ground/bedrock  or side of the glaciers. This rubbing causes scouring and erosion of the bedrock.

c)Freeze and thaw – the water in the glacier melts during the day time and enters into the cracked rocks. During night time, the temperature drops and the water in the crack freezes and expands. This causes further widening of the cracks. This continues until the crack enlarges to an extent where it breaks the rock into smaller pieces.

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.

a symbiotic relationship with the mitochondria