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.
Bill Gates was the top giver last year, according to the Philanthropy 50, assembled by the Chronicle of Philanthropy. Gates and his wife, Melinda, made a gift of $1.5 billion in Microsoft stock to the Bill and Melinda Gates Foundation. Emmanuel Dunand | AFP | Getty Images.