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.
Real Time Net Worth â as of 1/18/18 $92.2 b With his wife Melinda, Bill Gates chairs the Bill & Melinda Gates Foundation, the world's largest private charitable foundation. The foundation works to save lives and improve global health, and is working with Rotary International to eliminate polio. Gates has topped Forbes list of the 400 richest Americans for 24 years in a row.