Help.Im stuck.

(10 points) 1. cone 2. rectangle 3. triangle 4. circle 5. cylinder a. perpendicular cross section of a pyramid b. perpendicular cross section of a cylinder c. parallel cross section of a sphere d. shape created when a rectangle is rotated about the y-axis e. shape created when a right triangle is rotated about the y-axis

Which statements explain how ponds and lakes differ? check all that ponds are shallower than lakes. ponds are larger than lakes. pond water moves more than lake water. lakes have more plants at the bottom than ponds. lakes are colder and darker at the bottom than ponds.

Which of the timelines above correctly shows the order of historical events on the african continent? a. one (1) b. two (2) c. three (3) d. four (4)