Critical thinking questions 1. how do comets, asteroids, and meteorites influence life on earth? 2. compare and contrast comets, asteroids, and meteoroids. 3. what current risks are there to earth from neos? 4. where are meteorite remains most commonly found? why? 5. how have telescopes changed the way scientists study our solar system?

Which articulations allow for greatest range of motion?

Avolcano erupts next to a grassland area in a valley. a. describe three ways in which material released by the volcano could impact the grassland area. b. describe three ways in which the grassland ecosystem could recover after a volcanic eruption.

Water is siphoned from a large tank and discharges into the atmosphere through a 50-mm diameter tube. the end of the tube is b = 2.1 m below the tank bottom which is a = 7.4 m deep, and viscous effects are negligible. determine the maximum height h over which the water can be siphoned without cavitation occurring. atmospheric pressure is 101.4 kpa, and the water vapor pressure is 1.79 kpa (absolute)