Teas 7 Chemistry Latest Update Exam With All Correct Answers

Teas 7 Chemistry Latest Update Exam With All Correct Answers Heat capacity - ANSWER-the number of heat units needed to raise the temperature of a body by one degree. Malleability - ANSWER-the ability of a substance to be hammered or beaten into thin sheets What is a physical property? - ANSWER-a characteristic that can be observed or measured without changing the identity of the substance What is cellular transport? - ANSWER-the movement of molecules in/out of cells to keep cells alive and maintain homeostasis Cellular transport is split into two categories - ANSWER-a. Active transport b. Passive transport What is active transport? - ANSWER-the movement of ions or molecules across a cell membrane into a region of higher concentration, assisted by enzymes and requiring energy. ACTIVE=ENERGY What is passive transport? - ANSWER-The movement of materials across the cell membrane without using cellular energy. PASSIVE=NO ENERGY What is diffusion? - ANSWER-The movement of particles from an area of high concentration to an area of low concentration. What is an example of Diffusion? - ANSWER-For example, when you add a drop of food coloring to water, immediately, the food coloring begins to spread (or diffuse) throughout the water, eventually reaching equilibrium where all areas have the same concentration of coloring: What is a concentration gradient? - ANSWER-difference in the concentration of a substance from one location to another What is Kinetic Energy? - ANSWER-the energy an object has due to its motion. An example of kinetic energy is - ANSWER-running water KCl is an example of which type of bond? - ANSWER-ionic What is an ionic compound? - ANSWER-Ionic compounds are compounds made up of ions that form charged particles when an atom (or group of atoms) gains or loses electrons. A cation is an ion charged positively; an anion is an ion charged negatively. What is an ionic bond? - ANSWER-Formed when one or more electrons are transferred from one atom to another. Which of the following is exchanged between two or more atoms that undergo ionic bonding? - ANSWER-Valence electrons What is an ion? - ANSWER-Ions are formed when an atom gains or loses electrons What is a negative ion? - ANSWER-A negative ion is created when an atom gains electrons. Electrons have a negative charge. What is a positive ion? - ANSWER-A positive ion is created when an atom loses electrons. Electrons have a negative charge.