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.
As of 16 May 2013, Bill Gates had donated $28 billion to the foundation. Gates was the world's highest-earning billionaire in 2013, according to the Bloomberg Billionaires Index, with a fortune of $78.5 billion. He still owns about 4.5 percent of Microsoft and is its largest individual shareholder.