Fall Semester Exam Review SSMS exam 2024 with 100% correct answers

When should goggles be worn in the lab? - When using Fire/Heat, Glassware, and/or Chemicals What should you do if you are not sure what you should be doing during a lab activity? - Read directions first and then ask your teacher. When is it appropriate to tie back long hair and/or baggy clothes? - When using flame or chemicals in the lab. How do you dispose of chemicals in the lab? - Follow teacher's instructions. What TOOLS are used to measure LENGTH? - Ruler, Meter Stick, Measuring Tape What is the AREA of piece of paper with the length of 25 cm and width of 20 cm? - 20 x 25 = 500 cm2 What is the formula for finding the VOLUME of a SOLID object? - L x W x H cm3 What TOOLS are used to measure liquid VOLUME? - Graduated Cylinder, Beaker What UNITS are LIQUID VOLUME measured in? - milliliters (mL) , liters (L) How do you find the DENSITY of an object & what is the correct unit? - Mass / Volume (Mass divided by Volume) g/cm3 What is MASS? - The amount of matter in an object. What TOOL do we use to measure the MASS of an object? - Triple Beam Balance What UNITS are MASS measured in? - grams (g) , kilograms (kg) Explain how you find the volume of an irregular shaped object. - Water Displacement: Put water in a graduated cylinder. Measure the amount. Add object and measure new volume. Subtract first volume from second volume and unit would be cm3. What is the difference between QUALITATIVE and QUANTITATIVE observations and give an example of each? - QUALITATIVE -data in the form of descriptions/words using the senses; temperature increased, color QUANTITATIVE-data in the form of numbers; 16.7 grams What is the correct format for writing a hypothesis? - If..Then... Statement What do we call the series of steps designed to help you solve problems and answer questions in science? - Scientific Method In an experiment, the one variable that is changed by the investigator on purpose is called the - Independent variable In an experiment, the factor or variable that we measure is called the - Dependent variable A scientist conducted an experiment to determine how the amount of salt in a body of water affects the number of plants that can live in the water. In this experiment the dependent variable is - Number of plants that can live in water In science, an educated guess is called a/an - Hypothesis Another name for the INDEPENDENT variable is - Manipulated variable Another name for the DEPENDENT variable is - Responding variable When graphing our data, on which axis does the INDEPENDENT variable go along? - X-Axis When graphing our data, on which axis does the DEPENDENT variable go along? - Y-Axis Is EVAPORATION an example of a CHEMICAL or PHYSICAL change and WHY? - PHYSICAL because it is a change in a state of matter. It goes from a liquid to a gas. The smallest particle and building block of matter is a(n) - ATOM The mass of the substances reacting to one another (reactants) is ____________________ the mass of the substances produced (products) after a chemical reaction. - the same as / equal to An example of a chemical change: - pouring vinegar into baking soda