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.
NEW YORK (AP)  Americans gave nearly $300 billion to charitable causes last year, setting a record and besting the 2005 total that had been boosted by a surge in aid to victims of hurricanes Katrina, Rita and Wilma and the Asian tsunami.nvestment superstar Warren Buffett announced in June 2006 that he would give $30 billion over 20 years to the Bill and Melinda Gates Foundation. Of that total, $1.9 billion was given in 2006, which helped push the year's total higher.