PES Final Exam Study Guide with Complete Solutions!!

What piece of equipment could be used to determine the mass of a sample of salt - ANSWER-- Balance (electric) - Triple Beam Balance Which piece of equipment would give the most precise measure of the volume of a solution of salt water - ANSWER-graduated cylinder What is matter? - ANSWER-Anything that has mass and takes up space Elements and compounds are classified as pure substances because... - ANSWER-- from earth - only one definite composition Which state of matter has a definite volume and definite shape? - ANSWER-Solid Evaporation usually refers to the change of state from a... - ANSWER-Liquid to gas The unit for measuring the mass of a candle on an electric balance is in... - ANSWER-grams True or false: energy can enter and leave a closed system - ANSWER-true A fast moving stream can cause exposed soil to erode away. This is an example of which two "spheres" directly interacting? - ANSWER-Hydrosphere and Geosphere A heavy rain causes the soil from a hill to be carried into a river. What is this an example of? - ANSWER-Erosion As the Earth's temperature rises, more water evaporates, which causes more heat to be trapped. This is an example of what two regions of the Earth directly interacting? - ANSWER-Hydrosphere and Thermosphere What kind of bond holds one water molecule to another water molecule? - ANSWER-Hydrogen bonds Which of these correctly describes the percentage of where water is on Earth? - ANSWER-97% salt 3% frsh 71% surface