EVERYDAY SCIENCE

Detailed explanation-1: -Because trees are sensitive to local climate conditions, such as rain and temperature, they give scientists some information about that area’s local climate in the past.

Detailed explanation-2: -Modern observations mostly come from weather stations, weather balloons, radars, ships and buoys, and satellites. A surprisingly large number of U.S. measurements are still made by volunteer weather watchers.

Detailed explanation-3: -Tree rings, ice cores, and varves indicate the environmental conditions at the time they were made. The distinctive patterns of tree rings, ice cores, and varves go back thousands of years. They can be used to determine the time they were made.

Detailed explanation-4: -Clues about the past climate are buried in sediments at the bottom of the oceans and lakes, locked away in coral reefs, frozen in glaciers and ice caps, and preserved in the rings of treesTo extend those records, paleoclimatologists look for clues in Earth’s natural environmental records.