Journal Question

22 Jan 2013

What are the units for mass, volume, and density of a solid object?

S

Finding Mass, Volume, and Density

Mass

The amount of matter in an object

Measured in grams (g), milligrams (mg) or kilograms (kg)

Stays the same unless matter is removed or added.

Mass

Use the triple beam balance, and the digital balance to find the mass of ten different objects.

Record the objects, and the mass in your science notebook.Object (describe it) Mass (grams)

Journal Question

23 Jan 2013

Convert 230 mg into grams.

Convert 42.3 grams into milligrams.

Calculate the volume of a cube with each side measuring 2 cm.

Volume

Measures the amount of space an object occupies.

1ml = 1 cm3

Milliliters and Liters for measuring Liquids ( ml, l)

Cubic Centimeters for measuring the volume of solids (cm3)

Volume Rectangular Solids

To find the volume of a rectangular solid:

Length x Width x Height

Find the volume of a cubic centimeter.

Find the volume of five other rectangular solids.

Object Lengthcm

Widthcm

Heightcm

Volume cm3

VolumeLiquids

To find the volume of a liquid, use a beaker or a graduated cylinder.

Choose a graduated cylinder to find the following volumes of water, and draw a picture of it in your science notebook.

10 ml, 50 ml, 100 ml, 32 ml, 5 ml

Journal Question

24 Jan 2013

Explain (or draw) a cubic centimeter.

Explain density (not units).

VolumeIrregularly Shaped Solids

1 ml = 1 cm3

Water Displacement Method

1. Pour water into a graduated cylinder2. Write down the amount of water3. Place the object into the water4. Record the new water level5. Record the number of ml that the water level changed6. Change ml to cm3

VolumeIrregularly Shaped Solids

Find the Volume of 10 Irregularly Shaped Objects

Object Starting Volume (mL)

Ending Volume (mL)

Difference (mL)

Volume (cm3)

Journal Question

25 Jan 2013

You can easily reshape a paper clip by unbending it into a straight piece of wire. Would the mass or volume change? Explain.

Density

Density is a relationship between mass and volume.

D= Density g/cm3

M= Mass (g)

V= Volume (ml)

Mass / Volume = Density

Calculate Density

1) A rock has a mass of 25 grams. It’s volume is 5cm3. Calculate the density of the rock.

2) A book has a mass of 500 grams. The volume of the book is 100cm3. Calculate density.

3) You found a piece of some sort of metal in your back yard. What would you need to do in order find out exactly what kind of metal it is? Explain

Journal Question

28 Jan 2013

Write and solve your own density problem. Share it with your neighbor and solve

their problem.

Find the density of some of the objects you measured earlier. If you have volume, find mass

and calculate density. If you have the mass, find the volume and calculate density.

Object (describe)

Mass (grams)

Volume (cm3)

Density g/cm3

Videos

Mr. Edmond’s Density Song

Eureka! Volume and Density