Sunlight shining through a clear window hits Jeremy's face while he does his homework. He uses a large wooden block to cover the window. What do the wooden block and the clear window demonstrate?

Sex cells from female reproductive organ? 1) mitosis 2) fertilization 3) zygote 4) eggs 5) meiosis 6) sperm

How does a hydroelectric power plant converts energy into energy.

Astudent states that 9.0 g of baking soda will form an unsaturated solution in 100 g of water. what do you need to know to decide whether this statement is correct? a. the temperature of the water and the molar mass of baking soda b. the percent by volume of the solution and the solubility of baking soda c. the temperature of the water and the solubility of baking soda at that temperature