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 Bill & Melinda Gates Foundation, the charity run by Microsoft cofounder Bill Gates and his wife, announced Wednesday that it would be donating $50 million toward fighting the Ebola outbreak in West Africa. This marks the largest donation to a humanitarian cause from the foundation, according to the Associated Press.