Start-up #11 1. Write down at least three observations and inferences about the object on your table: Observations Inferences

Lab equipment scavenger hunt You will have 5 minutes at each station to sketch the lab equipment to complete your chart

Science 8 notes – Chemistry The Kinetic Molecular Theory and the Atomic Theory What are some ways to describe matter?   Matter = Anything that has mass and takes up space

Physical Properties: Matter can be described by its physical properties. Physical properties are characteristics that can be observed or measured without changing its chemical identity. These properties can be qualitative or quantitative. Qualitative Properties: Properties that involve using your five senses. These include colour, taste, texture, state, luster, malleability. Quantitative Properties: Properties that can be measured and assigned a value. These include melting point, boiling point, solubility, hardness, viscosity, and buoyancy.

Mass and Volume: https://www.youtube.com/watch?v=-NqF7tHTAQc Mass and Weight are different things! Mass = the amount of matter in an object stays constant no matter where you are in the whole universe measured in grams (g), kilograms (kg) or milligrams (mg) We measure mass using a centigram balance or an electronic balance Weight = a measurement of the force of GRAVITY pulling in an object measures in Newtons (N) NOT the same everywhere in the universe (like the moon) BUT is the same everywhere on earth

Direct and Indirect measuring There are two methods of measurement used to determine the volume or mass of an object: direct (such as using a ruler for a regular solid) and indirect (such as using displacement for an irregular solid).

Measuring the Mass of a Regular Item (DIRECT Measurements): The mass of a regular item is taken by placing the item on a balance Always make sure the balance reads “0.00” before placing your item on it, if it does not ask for help to ensure an accurate reading Units of Mass Kilograms (kg) for large items (ex. car, a person, a book) 1kg = 1000g Grams (g) for moderate items (ex. pencil, calculator, keys) base unit Milligrams (mg) for very small items (ex. paper clip, feather) 1g = 1000mg

Measuring the Mass of a Liquid (INDIRECT Measurements): We obtain the mass of liquid by placing the liquid in a container and on a balance Directions for taking the mass of a liquid Obtain the mass of an empty, dry, container (graduated cylinder, beaker etc.) Record this mass as M EMPTY CONTAINER Fill the container with a desired volume of liquid (always measured in a graduated cylinder) Record this mass as M FILLED CONTAINER Subtract the mass of the empty container from the mass of the filled contain to obtain the mass of the liquid M FILLED CONTAINER - M EMPTY CONTAINER = M LIQUID

Suppose you have an empty beaker with a mass of 5. 22g Suppose you have an empty beaker with a mass of 5.22g. You add 20mL of water to the beaker, and the mass now reads 17.4g. What is the mass of the water in the beaker?

Measuring Metric mass lab Use a triple beam balance to find the mass of objects

Vocabulary list Using your glossary on page 375 write the definitions to each vocabulary term