AC Chem: Intro to Chemistry: Quiz

Test your intro to chemistry knowledge! Covers scientific method, branches, and measurement.

Scientific Method Purpose The goal of the experiment Research Background information to clarify what will happen Hypothesis Guess about what will happen (IF Experiment Procedure that will be done in lab Analysis Use data to accept or reject the hypothesis Conclusions How to improve the experiment and how it relates to class and life in general Pick the best word to fill in the blanks. Chemistry is the study of matter. Matteris anything that has mass and takes up space. Mass is sometimes used interchangeably with the word "weight". Mass is a measurement of how much matter is present, while weight is the measurement of mass with respect to gravity. Weight depends on your location, but mass is the same everywhere! Long ago scientists believed in only four elements. All things were made from Earth, Air, Fire, or Water. Combining these elements would result in some obvious change, so these early scientists, called Alchemists, believed that one substance could be changed into another by manipulating the elements. Their big goal was to change some base metal like iron or lead into gold. They were correct that combining elements can cause changes in properties, but it is not actually possible (YET?) to change lead into gold! In modern Chemistry we study both the Macroscopic and the Microscopic properties of matter. We can see and use Macroscopic information without using tools, but Microscopic properties require tools because they are so small. There are 5 basic areas of Chemistry. Physical Chemistry involves the study of macroscopic properties. Chemical reactions would fall under this field. Organic chemistry is the study of substances that include Carbon, which is often found in living things. Inorganic chemistry is an area of study that generally does not include carbon, and can be seen in our use of technology. Analytical Chemistry focuses on the microscopic aspects of elements. The composition of matter is a primary focus. Finally, Biochemists are interested in how chemistry is utilized by living systems to automatically achieve tasks without the involvement of the brain or nervous system. As with any advancement of human knowledge, increases in understanding of chemistry involves the use of observations and logic. Inductive reasoninginvolves observing lots of examples, and coming to a general conclusion that appears to always be true. Drop something on Earth, and inductive reasoning says it will fall downwards. Deductive reasoningis a little different as it involves making a prediction based on several observed examples. This information will lead to a conclusion that is always true. Which field of chemistry is it? Sort these examples into the correct choice. Hint - each category gets 3 items! Physical Chemistry Speed of Chemical Reactions Electricity becomes Light Battery Improvement Organic Chemistry Fossil fuels Soot, Pencil Lead, and Diamonds Different types of Plastic Inorganic Chemistry Liquid Crystal computer displays Wifi signals Memory sticks Analytical Chemistry Periodic Table patterns Microscopic structure of Bubbles What elements are in water? Biochemistry Hormones Blood types Insulin for Diabetes Sort these examples into their proper categories. These are examples of Chemistry uses in the Real World. Can you figure out where they belong? Energy Gasoline for a car Dynamite! Batteries Hand warmers Medicine Chemotherapy Aspirin Worm Spit (aka Silk) Agriculture Desalination A spray that kills Poison Ivy Nitrogen fixation (bacteria!) Materials Silk in Fashion Kevlar Ceramics 3D Printer "inks" Environment Hazardous Waste Disposal Lead Paint Eating Tuna Fish Vocabulary Check Match the phrase to the best definition based on Chemistry! Alchemy Early attempts at Chemistry. Robert Boyle Father of Chemistry Gravity the attraction between any two objects whose strength depends on size and distance Pure Chemistry Study for the purpose of discovering new information Applied Chemistry An attempt to solve a problem or achieve a desired goal. Lab Report A very clear communication of the results of using the Scientific Method. Convert 2.45 Liters to the correct number of mL (milliliters). .00245 mL 245 mL 2,450 mL Change the normal number 157 into Scientific Notation. 0.157 x 10-3 1.57 x 10-2 1.57 x 102 0.157 x 103 How many significant figures are in 0.0304 grams? 5 4 3 2