As the sun warms the surface water on a lake, a. convection will cause the warmer water will remain on the top b. convection will cause the the warmer water to sink to the bottom c. conduction will cause the the warmer water to sink to the bottom d. the warmer water will remain on the top, if there are no disturbances to the water e. none of the above

Brad and his family like to go camping. they always take a gas lantern with them. the lantern can take fiuels but always puts out the same amount of light. brad has two different kinds of fuel for the lantern. how can he figure out which kind of fuel has more chemical energy that the lantern can turn into light? measure the brightness of the lantern using each kind of fuel by comparing it to the full moon. g measure the volume of the containers of fuel. measure how long the lantern stays lit on a fixed amount of fuel. measure the mass of each container of fuel using a balance scale. answer 12

Iknow #2 is d. i just need to know why

What does the process of natural selection involve