Grade 3 Topic IVMass and Volume of Solids and Liquids

Office of Academics - Department of Science

Benchmarks• SC.3.P.8.1 Measure and compare temperatures of various samples

of solids and liquids. Cognitive Complexity: Level 2: Basic Application of Skills & Concepts

• SC.3.P.8.2 Measure and compare the mass and volume of solids and liquids. Cognitive Complexity: Level 2: Basic Application of Skills & Concepts

• LAFS.3.SL.1.1 Engage effectively in a range of collaborative discussions (one-on-one, in groups, and teacher-led) with diverse partners on grade 3 topics and texts, building on others’ ideas and expressing their own clearly.

• MAFS.3.MD.2.4 Generate measurement data by measuring lengths using rulers marked with halves and fourths of an inch. Show the data by making a line plot, where the horizontal scale is marked off in appropriate units—whole numbers, halves, or quarters.

Office of Academics - Department of Science

Let’s watch!All matter has mass and volume.

Mass and volume can be measured.

Office of Academics - Department of Science

What is mass?Mass is the amount

of matter an object has.

Mass is a property of matter that can be measured.

Office of Academics - Department of Science

What tools do scientists use to measure mass?

Office of Academics - Department of Science

Balance & gram pieces

Pan balance & gram pieces

Triple Beam balance

Electronic balance

Using a Balance to measure MassA balance scale compares a KNOWN mass, to an

UNKNOWN mass. When the scale is “balanced” on both sides, you know the mass of the unknown.

Office of Academics - Department of Science

What is the mass of cube x?How do you know?

But what is Weight?Weight is the measure of the pull of gravity on an object.

The weight of an object is different in different places.

Office of Academics - Department of Science

The mass of an object is the same no matter where the object is!

Using a Spring ScaleA Spring Scale is used to measure the pull of gravity on an

object (weight). A spring scale has Newtons (N) metric units.

As gravity pulls down on an object, the weight is measured. You see spring scales commonly used in grocery stores.

WEIGHT

Office of Academics - Department of Science

Mass and Weight

Office of Academics - Department of Science

What is Volume?

It is the amount of space that an object takes up.

Volume is also a property of matter that can be measured.

Solids, Liquids, and gases all have volume.

Office of Academics - Department of Science

Measuring Volume• Find three rectangular prisms, or boxes around the

classroom. Make sure they are different in size. • Use the cm ruler to find the length, width, and height

of each rectangular prism.

Office of Academics - Department of Science

Measuring Volume• Complete the table below using the information you

gathered. Use the formula Length X Width X Height = Volume.

Office of Academics - Department of Science

BOX LENGTH (cm) WIDTH (cm)

HEIGHT (cm)

VOLUME (cm)

A

B

C

Which of the boxes can hold less? How do you know?

Measuring Volume• Fill a graduated cylinder with 70 mL of water.• Place the first rock in the water and record the new

level of the water in the data table.• Take out the rock and make sure that the graduated

cylinder still has 70 mL of water.• Repeat steps 1-4 for all three rocks.• Complete the table.

Office of Academics - Department of Science

Measuring Volume

Office of Academics - Department of Science

ROCK VOLUME OF WATER (mL)

VOLUME OF WATER WITH STONE (mL)

DIFFERENCE IN VOLUME (mL)

1 70 mL

2 70 mL

3 70 mL

Which rock had the greatest volume?

REVIEW Questions1. What do you call the amount of matter an

object has? 2. How is matter measured?3. What does the word volume describe about

an object? 4. What tools could you use to measure

volume?BONUS: Would your weight change on the

moon? What about your mass? Explain.

Office of Academics - Department of Science

What is Temperature?

• Temperature is the average speed of the particles in a substance.

• Temperature is measured with a thermometer.

• The units of measurement are Degrees Celsius (°C) & Degrees Fahrenheit (°F)

Celsius RhymeThirty's hot Twenty's nice Ten's cold Zero's ice

Office of Academics - Department of Science

Temperature

Office of Academics - Department of Science

MEASURING TEMPERATURE• Using a thermometer, get in groups of 4 to

compare the inside and outside temperature of the classroom.

• Take turns recording the inside and outside temperature every hour of the school day.

Office of Academics - Department of Science

MEASURING TEMPERATURE

Office of Academics - Department of Science

HOUR 1 HOUR 2 HOUR 3 HOUR 4

INSIDE TEMPERATURE

OUTSIDE TEMPERATURE

Analyze your data

Office of Academics - Department of Science

• Compare the temperatures recorded.• In your group, discuss and explain the

difference of the measured temperatures.• Think about how the data collected could

have been different? Why?

Vocabulary• Matter• Property• Mass• Volume• Weight• Meter• Centimeter• Liter• Milliliter

• Balance• Meter stick• Thermomete

r• Temperature• Celsius• Fahrenheit• Degrees

Office of Academics - Department of Science