Which of the following is true concerning continental crust? a. it does not contain radioactive elements. b. it mostly contains heavier and denser minerals than the mantle. c. it efficiently transfers heat from the mantle to the surface. d. none of the above

Put the following steps of the convection process in the correct order. 1. gravity pulls cooler matter downward. 2. the matter expands and decreases in density. 3. an up-and-down flow of matter produces a convection current. 4. matter is heated. 5. warmed matter is forced upward. question 2 options: a) 4, 2, 5, 1, 3 b) 2, 4, 3, 1, 5 c) 3, 2, 5, 4, 1 d) 1, 4, 2, 5, 3

Anne, an intern in a microbiology lab, was observing the characteristics of various specimens of protists. match each specimen to the category of protist to which it belongs.

Will give ! ! widentify the advantages and disadvantages of renewable and nonrenewable energy resources.