Math 5 Measure Volume Using Cubic Units Instructor: Mrs. Tew Turner

In this lesson we will learn how to measure volume using cubic units.

Math Warm-up Do this problem mentally. Begin with $0.25 Multiply by 8. Subtract $0.90. Divide by 2.

Math Warm-up - ANSWER Do this problem mentally. Begin with $0.25 Multiply by 8. Subtract $0.90. Divide by 2. $0.55

In this lesson we will answer the question: How do you measure volume? Pause this lesson & Print out the attached document for lesson 54, Fill ‘Er Up. I will use it to demonstrate how you should do it. You will complete it independently at the end of the lesson.

Vocabulary Review geometric solid- a figure that has three dimensions and takes up space polyhedron – another name for a 3-D figure, which means ‘many faces’

Vocabulary volume- the number of cubic units needed to fill a solid figure (measured as u 3 ) cubic unit – the volume of a cube that measures 1 unit on each edge

Vocabulary rectangular prism- A solid (3- dimensional) object which has six faces that are rectangles prism – solid with two congruent parallel bases and faces that are parallelograms

Vocabulary rectangular prism- A solid (3- dimensional) object which has six faces that are rectangles depth – extend downward or backward or inward; "the depth of the water"; "depth of a shelf"; "depth of a closet"

Connecting to Previous Learning In the last lesson, you learned about the attributes of a geometric solid. In this lesson, you will learn how to measure the volume of a solid. This is similar to measuring the area of a 2-D object.

Volume is measured in cubic units. Two common units of volume are the cubic centimeter and the cubic inch. The volume of a rectangular prism is a measure of how much space the object takes up.

Document Camera Get your notebook and pencil ready. Make sure you have the Lesson # and date on your page.

In your Math Notebook Independent Practice We will work a few of these together. You will finish filling in the chart for homework, after the lesson. You may work with a partner to do so. Use the website to complete the activity.

How do we calculate the volume of this object?

Try these on your own: 1. 2.

Lesson Review Volume is the amount it takes to fill up a solid, or 3-D figure. It is measured in cubic units. (u 3 )

Quick Check In your Math Notebook 1. Which dimensions can be measured in a prism? 2. Define volume in your own words.

Quick Check Find the volume of this cube. Include the correct unit of measure.

Quick Check - ANSWERS 1.Which dimensions can be measured in a prism? Length, width (or depth), and height 2. Define volume in your own words. Your definition should include something about solids, or 3-D figures, and the space that they take up. It may also include something about measuring with cubic units.

Quick Check Find the volume of this cube. Include the correct unit of measure. 60 cm 3, or 60 cubic centimeters

Today you learned how to find the volume of a rectangular prism using cubic units. Good Work with this lesson.