1. Physical Weathering. In physical weathering the rocks are broken down into smaller pieces, but the chemical composition of the rock remains the same. Temperature Change. Hot temperatures can give rise to thermal expansion in rocks and cool temperatures can cause rocks to contract.
Buffett Donates $2.8 Billion, Breaks Personal Giving Record. Warren Buffett has bested his own personal philanthropy record once again, donating $2.8 billion to the Bill and Melinda Gates Foundation and several other charities as part of his annual giving pledge. The gifts given Monday top last yearâs $2.6 billion donation.
She is also an American philanthropist, her charitable work has focused largely on the Sherwood Foundation, formerly known as the Susan A. Buffett Foundation, an organization in Omaha that provides grants in public education, human services and social justice in the interest of promoting the welfare of children from lower-income families.