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.
The pair has commended the commitment, in part because it was done so publicly, a model of philanthropy they have championed with âThe Giving Pledge.â Launched by the Gateses and Warren Buffett in 2010, The Giving Pledge is a campaign that invites the wealthy to give more than half of their money to philanthropic causes or charitable organizations.