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.
DECEMBER | The foundation makes grants totaling $3 billion during 2009, and its staff. count exceeds 800. NOVEMBER | Bill and Melinda make a one-time $350 million gift toward construction. costs of the foundationâs new headquarters in the heart of Seattle, slated to open spring 2011.