Answer:
Step-by-step explanation:
(I) Frost Action: Water freezes in cracks and pores of rocks and soil, then expands and exerts pressure on surrounding material, causing it to crack and break apart.
(II) Exfoliation: Rocks exposed to high temperatures and pressures crack and peel away, breaking down into smaller pieces, forming soil and sediment.
8a. Solar energy is derived from the sun.
8b. Advantages of solar energy include being renewable, sustainable, and not producing harmful emissions or pollutants. It can also be used in remote or off-grid locations and can reduce energy costs.
8c. Problems with harnessing solar energy include high installation and maintenance costs, intermittent availability, and environmental impacts from production.