Praxis 5442 Study guides, Class notes & Summaries

Praxis 5442 - Physical Science Latest Update Graded A+ [Ca(NO3)2] calcium nitrate 1st law of thermodynamics The principle of conservation of energy. Energy can be transferred and transformed, but it cannot be created or destroyed. 2nd law of thermodynamics The principle whereby every energy transfer or transformation increases the entropy of the universe. Ordered forms of energy are at least partly converted to heat, and in spontaneous reactions, the free energy of the system also...

Praxis 5442 Middle School Practice Questions with Complete Solutions A book is at rest on a tabletop. A teacher asks students to sketch the forces exerted on the book. Which of the following student diagrams best depicts all the forces exerted on the book? For an object at rest, forces must be balanced. The student diagram correctly depicts the balanced forces acting on the book, the force of gravity directed downward, and the force exerted by the table directed upward. A certain spec...

Praxis 5442 Middle School Science Latest Verizon 100% Verified Absorbtion The transfer of energy from a wave to matter as the wave passed through it. Acceleration The rate at which velocity changes with time. Acceleration Formula acceleration = final velocity - initial velocity / time Alkali Metals The first column (group or family) on the periodic table (excluding hydrogen). Alkaline Earth Metals The second column (group or family) on the periodic table. Amplitude 1/2 the dis...

Praxis 5442 Middle School Science Latest Update Already Passed 1 calorie = ____ joules 4.184 joules A mole of gas the number of molecules in the gas expressed in terms of Avogadro's number acid compound that forms hydrogen ions (H+) in solution alkali metals (group 1) characteristics soft, most reactive metals, easily give away valence electrons, 1 valence electron Amperes the unit for measuring electrical current; the abbreviation is amp. Amplitude Height of a wave angul...

Praxis 5442 Life Science Latest Update 100% Verified Animal Behaviors Actions animals take to survive in their environments. Examples are hibernation, migration, and instincts. Example: Birds fly south in the winter because they can find more food. Animal Structural Adaptations A characteristic in a plant or in an animal's body that helps it to survive in its environment Biomolecules also called biological molecule, any of numerous substances that are produced by cells and livin...

Physical Science Praxis 5442 Latest Update 100% Solved Acid a chemical substance that neutralizes alkalis, dissolves some metals, and turns litmus red; typically, a corrosive or sour-tasting liquid of this kind ( ph lower than 7) Acid-Base Reaction is a chemical reaction that occurs between an acid and a base. It can be used to determine pH. Aqueous An aqueous solution is a solution in which the solvent is water Atomic Mass # of protons + # of neutrons of an element Atomic Nu...

Matter - ANSWER Anything that has mass and takes up space. John Dalton - ANSWER Proposed elements were made of atoms; this theory is the Atomic Theory of Matter. Sir Joseph John (J.J.) Thompson - ANSWER Discovered electrons; pictured electrons embedded with protons.

potential energy - ANSWER Energy that is stored and held in readiness 3rd law of thermodynamics - ANSWER the law that states that in order for motion to stop we have to reach absolute zero critical point - ANSWER a point on a phase diagram at which both the liquid and gas phases of a substance have the same density, and are therefore indistinguishable. chemical energy - ANSWER A form of potential energy that is stored in chemical bonds & intermolecular forces between atoms.

1. Which of the following characteristics is most important in demonstrating that a hypothesis should be called a theory? a. It interprets an observation. b. It applies to a narrow range of phenomena. c. It summarizes the most recent work of a scientists. d. It provides an explanation for the results of many experiments. - ANS d. it provides an explanation for the results of many experiments.