Get out your Lab Notebook While you are waiting to be checked off: – 1. Write the objectives, and pass in your Journal entry – 2. Read the Observation paragraph and Research summary instructions – 3. What tool is used to measure liquid volume?

Review of Mass and Volume T. Trimpe

Mass definition The amount of matter in an object

Units Grams

Tools Scale or balance

Volume definition The amount of space an object takes up

Units Solid Volume: cm 3 Liquid Volume: mL 1 mL = 1 cm 3

Tools Liquid Volume: graduated cylinder Regular solid volume: ruler Irregular solid volume: graduated cylinder

3 methods for measuring volume 1. Direct measurement- volume of liquids 2. L x W x H – volume of regular solids 3. Water displacement- volume of irregular solids

Mass Mass refers to the amount of matter in an object. The base unit of mass in the metric system is the gram and is represented by g. Since a gram is so small, we usually use kilograms, represented by kg. Mass is measured with a scale. When measuring mass, find the mass by weighing the object on the digital scale. Or, find the mass by using the balance. Kilogram Prototype Kilogram Prototype Image -

Volume Volume is the amount of space an object takes up. The base unit of volume in the metric system in the liter and is represented by L. When talking about solid volume we use cubic centimeters, represented by cm 3 Metric Units 1 liter (L) = 1000 milliliters (mL) 1 milliliter (mL) = 1 cm 3 (or cc) = 1 gram* * When referring to water Liter Image:

Measuring Volume Top Image: Bottom Image: We use graduated cylinders to find the volume of liquids through direct measurment. Read the measurement based on the bottom of the meniscus or curve. When using a real cylinder, make sure you are eye-level with the level of the water. What is the volume of water in the cylinder? _____mL What causes the meniscus? A concave meniscus occurs when the molecules of the liquid attract those of the container. The glass attracts the water on the sides.

Measuring Solid Volume Click here for an online activity about volumeClick here for an online activity about volume. Choose Lessons  Volume & Displacement 10 cm 9 cm 8 cm We measure the volume of regular object with a ruler using the formula length x width x height. _____ X _____ X _____ = _____ llabus/unit14/new/testingmain1.htm We can measure the volume of irregular object with a graduated cylinder using water displacement. Amount of H 2 O with object = ______ About of H 2 O without object = ______ Difference = Volume = ______

Density Definition: a measure of how much matter is in a given space Units: liquids- g/mL solids- g/cm3 Tools: ruler and scale or graduated cylinder and scale Density = Mass divided by Volume

Density Density is a measure of how much matter is in a given space Tools used to measure density would be a graduated cylinder and scale, or a ruler and scale. The basic unit for density of liquids is g/mL. The basic unit for density of solids is g/cm 3 Density = Mass Volume