Chem 1009 Topic 1 Exam With Detailed Correct Answers.

What is matter? - correct answers The physical material that makes up the universe, anything that has mass and occupies space What is energy? - correct answers the capacity to do work and supply heat What is chemistry? - correct answers The study of nature properties, in transformations of matter and energy What are the three states of matter? - correct answers solid, liquid, gas Define solid - correct answers a substance that has a definite shape and volume Define a liquid - correct answers A substance that has a definite volume, but assumes the shape of its container Define gas - correct answers A substance that has neither a definite volume, nor a definite shape Define physical changes - correct answers A change that does not affect the chemical make up of a substance or object (EXAM- water can be solid liquid or gas, but its chemical structure is always H2O) List the type of physical changes - correct answers Melting, boiling/vaporization,condensation,freezing,sublimation,deposition Define melting - correct answers Going from solid to a liquid Define boiling/vaporization - correct answers Going from liquid to gas Define condensation - correct answers Gas to liquid Define freezing - correct answers liquid to solid Define sublimation - correct answers Going directly from solid to gas Define deposition - correct answers Going from gas to solid Define pure substance - correct answers A substance that has a uniform chemical composition throughout Example of an element - correct answers gold Example of a chemical compound - correct answers water Define mixture - correct answers A combination of two or more substances that are not chemically combined Homogeneous mixture - correct answers A uniform make sure that has the same composition through Heterogeneous mixture - correct answers Non-uniform mixture that has regions of different composition Chemical change - correct answers A change in the chemical make up and properties of substance How to use scientific notation - correct answers Move the decimal to the right, Power becomes negative example