Wizgrades

Density mass divided by volume Specific Gravity The ratio of the density of a substance to the density of water Intensive property Properties independent of mass. Examples: density, specific heat, equivalent weight Extensive property Properties dependent of mass. Example: volume and mass Volume of a cylinder V = pi(r)^2h Mass of water displaced by a rock with 143g in air and 82 g in water Mass of water displaced = Mass of rock in air - mass of rock in water Volume of water displaced by...

Density mass divided by volume Specific Gravity The ratio of the density of a substance to the density of water Intensive property Properties independent of mass. Examples: density, specific heat, equivalent weight Extensive property Properties dependent of mass. Example: volume and mass Volume of a cylinder V = pi(r)^2h Mass of water displaced by a rock with 143g in air and 82 g in water Mass of water displaced = Mass of rock in air - mass of rock in water Volume of water displaced by...

Density Ratio of Mass to Volume Physical property Can be observed without changing the matter Intensive property Independent of the amount of matter (density, color) Extensive Property Depends on the amount of matter (mass, volume) At what state and temperature is water most dense? Liquid, 4 Can extensive properties impact intensive ones? Yes. Freezing of a balloon decreases the volume.

Which of the following is NOT a compound?O2, oxygen is a molecule What is the chemical symbol for the element, copper?Cu Which property is a chemical propertyflammability Which of the following mixtures is heterogeneous?granite Which of the following processes is/are physical changes? Select all that applywater evaporating, tearing a piece of aluminum in half Which unit is NOT an SI base unit?celcius Which metric prefix means 10^-9nano

graduated cylinder*volume contained accurately measures volume of an object/liquid (it is more accurate/precise than flasks and beakers) ring standstand used to support a ring clamp or a test tube clamp test tubeholds, mix, and heats liquids/chemicals in experiments evaporating dishporcelain/ceramic dish used to evaporate excess liquids to ensure that a solid or the dissolved substance is left behind (after being heated over a flame) wire gauze with ceramic centersemi-permeable barrier ...

watch glass what is this called? used as a cover what is a watch glass used for? hot plate what is this called? to heat glassware or its contents what is the hot plate used for? beaker what is this called? used to store, mix and heat liquids what is the beaker used for? graduated cylinder what is this called?

eye protection Safety goggles must protect against chemical splashes. Goggles must (1) completely cover the eyes, (2) fit along the forehead, (3) provide indirect ventilation (i.e., ventilation will not allow a splash to reach your eyes) chemicals in eyes Three eyewashes—two swivel units mounted on lab benches, and one pull-down eyewash located by the lab's main entrance if you get chemicals in your eyes wash them out with water, alert instructor with any injuries safety when pouri...

Experimental Study Manipulation and Randomization Quasi-Experimental Manipulation and no randomization Observational no Manipulation and no randomization What is the order or validity (high to low) 1. controlled experimental/randomized clinical trial 2. Quasi-experiment/community trial 3. cohort study _____ study is implement as intervention studies and is used to derive knowledge about the cause of disease has intuitive appeal experimental studies

Where does the word epidemiology derive from?Epidemiology originates from the Greek words, epi (upon) + demos (people) + logy (study of). Definition of EpidemiologyEpidemiology is concerned with the distribution and determinants of health and diseases, morbidity,injuries, disability, and mortality in populations. key aspects of the epidemiology definitionDeterminants Distribution Population Health phenomena Morbidity and mortality

Secular trends changes in disease frequency over time Aims of Epi 1. Describe health status of population 2. Explain etiology (cause) of disease 3. Predict occurrence of disease 4. Control occurrence Goals of Epi understand natural history and what influences the distribution Foundations of Epi 1. Interdisciplinary 2. Quantification 3. Use of special vocal: surveillance and epidemic threshold Surveillance systematic collection of data pertaining to the occurrence of a disease, an...