President lincoln had to address slavery even though he did not want to initially.

true
false

Which summarizes the relationship between density of an element and its distribution in earth? a. the greater an element’s density, the greater the amount of it found in the crust. b. the denser an elements is, the smaller the amount of it earth core. c. the greater an elements density, the smaller the amount of it’s found in the crust

Explain how a convection current in the earth is formed.

Which factors add to the greenhouse effect and are caused by human activities?