What is the temperature at the interface
between the mantle and the outer core?

When should a bar graph be used? a. when there is no independent variable. b. when the independent variable is continuous and does not show a relationship to the dependent variable. c. when the independent variable is continuous and shows a causal link to the dependent variable. d. when the independent variable is composed of categories and does not show a relationship.

An atom of nitrogen had seven protons in its nucleus. how many electrons does it have

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm