Describe three ways scientists can learn about past climate changes?

Question

Describe three ways scientists can learn about past climate changes?

Answer 1

does it have to be three?

they learn about past climate changes by the evidence that is left behind in soil, rock, deep core ice drilling, and extinct animal fossils

among other things

Answer 2

scientist can check the by driilling hole in artic, in which isotopes of air are trapped and also Tree Rings and by the Water. go to this website it is really good.

Answer 3

Sketches people made in the past. The way the ancient people built things. Fossils of extinct species. Usually a geographer would do the first 2.