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The metric system is based on multiplying by 10.

1 Km = 10 hectometers

1) How many hectometers are in 2 Km?

**Which one did you think was easier?

Bellwork 9/19: Solve the problem(s) below.

Okay now here is the US system.

1 mile = 1760 yards

2) How many yards are in 2 miles?

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In science class, we will be using the Metric System. The metric system is a system of measurement that is used by scientists all over the world.

The metric system is simpler and easier to use and understand than traditional measurement systems

Most countries only use the metric system.

In the United States, we use the English or Standard measurement System.

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There are different metric units depending on what we want to measure:
Meter (m): Length

Liter (l): Volume

Gram (g): Mass

Celsius (C): Temperature
These are called base units!

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What metric unit would you use to measure the distance you ride your bike?

What metric unit would you use to measure an elephant’s mass?

What metric unit would you use to measure how much liquid your bottle of coke contains?

Solve the problems below.

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When you add a prefix to a base unit you change it’s value.
Kilo- = 1000
Hecto- = 100
Deca- = 10
Deci- = .1 (1/10)
Centi- = .01 (1/100)
Milli- = .001 (1/1000)

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Sometimes we need to convert cm to meters or meter to kilometers.

Can you come up with an example of why you would want to measure or convert to different metric units?

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Convert 10m to Km

10m

1dkm

.1hm

.01km

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.7dkm

.07 hm

.007km

Your Turn!

Convert .007km to meters!

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45000 dkm

4500

450km

450000m

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65000

6500

650dm

65m

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Length/Distance

The basic unit of length in the metric system in the meter and is represented by a lowercase m.

Standard: The distance traveled by light in absolute vacuum in 1/299,792,458 of a second.

Metric Units

1 Kilometer (km) = 1000 meters

1 Meter = 100 Centimeters (cm)

1 Meter = 1000 Millimeters (mm)

Which is larger?

A. 1 meter or 105 centimeters

B. 4 kilometers or 4400 meters

C. 12 centimeters or 102 millimeters

D. 1200 millimeters or 1 meter

Click the image to watch a short video about the meter.

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Measuring Length

Ruler: http://www.k12math.com/math-concepts/measurement/ruler-cm.jpg

How many millimeters are in 1 centimeter?

What is the length of the line in centimeters? _______cm

What is the length of the line in millimeters? _______mm

What is the length of the line to the nearest centimeter? ________cm

HINT: Round to the nearest centimeter – no decimals.

1 centimeter = 10 millimeters

To measure length, we use a ruler.

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Metric Mini-Lab (Length) 9/19

In your lab groups you must use your meter stick to:

Measure in cm each of your group�Members, then add your heights together! Record this number as your group height in your notebook

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Which is longer?

1 kilometer or 1,500 meters ?
23 millimeters or 2 centimeters

C. 10 decimeters or 10 dekameter

D. 1 meter or 101 centimeters

Bellwork 9/20

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Mass

Mass refers to the amount of matter in an object.

Standard: 1 kilogram is equal to the mass of the International Prototype Kilogram (IPK), a platinum-iridium cylinder kept by the BIPM at Sèvres, France.

Metric Units

1 Kilogram (kg) = 1000 Grams (g)

1 Gram (g) = 1000 Milligrams (mg)

Which is larger?

A. 1 kilogram or 1500 grams

B. 1200 milligrams or 1 gram

C. 12 milligrams or 12 kilograms

D. 4 kilograms or 4500 grams

Kilogram Prototype

Kilogram Prototype Image - http://en.wikipedia.org/wiki/Kilogram

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Measuring Mass – Triple-Beam Balance

1^st – Place the clay on the scale.

2^nd – Slide the large weight to the right until the arm drops below the line. Move the rider back one groove. Make sure it “locks” into place.

3^rd – Repeat this process with the top weight. When the arm moves below the line, back it up one groove.

4^th – Slide the small weight on the front beam until the lines match up.

5^th – Add the amounts on each beam to find the total mass to the nearest tenth of a gram.

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Measuring Mass

Top Image: http://www.southwestscales.com/Ohaus_Triple_Beam_750-SO.jpg�Bottom Image: http://www.regentsprep.org/Regents/biology/units/laboratory/graphics/triplebeambalance.jpg

We will be using triple-beam balances to find the mass of various objects.

The objects are placed on the scale and then you move the weights on the beams until you get the lines on the right-side of the scale to match up.

Once you have balanced the scale, you add up the amounts on each beam to find the total mass.

What would be the mass of the object measured in the picture?

_______ + ______ + _______ = ________ g

300

3.4

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Metric Mini-Lab (MASS) 9/20

In your lab groups you must use your triple-beam balance to create a clay combination that equal the following weights:

5 grams
20.1 grams
1.5 gram
12.7 grams
10.25

*you must show me your scale perfectly balanced to move on!

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Which is larger?

A. 1 kilogram or 1500 grams

B. 1200 milligrams or 1 gram

C. 12 milligrams or 11 kilograms

D. 4 kilograms or 4500 decigrams

Bellwork 9/21

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Which is larger?

A. 5 kilometers or 500 meters

B. 800 milligrams or 8 grams

C. 12 millimeters or 12 centimeters

D. 17 kilograms or 1,000 centigrams

Bellwork 9/22

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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 or l.

Standard: 1 liter is equal to one cubic decimeter

Metric Units

1 liter (L) = 1000 milliliters (mL)

1 milliliter (mL) = 1 cm³ (or cc) = 1 gram*

Which is larger?

A. 1 liter or 1500 milliliters

B. 200 milliliters or 1.2 liters

C. 12 cm³ or 1.2 milliliters*

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Measuring Volume

Top Image: http://www.tea.state.tx.us/student.assessment/resources/online/2006/grade8/science/images/20graphicaa.gif�Bottom Image: http://morrisonlabs.com/meniscus.htm

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.

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Measuring Liquid Volume

Images created at http://www.standards.dfes.gov.uk/primaryframework/downloads/SWF/measuring_cylinder.swf

What is the volume of water in each cylinder?

Pay attention to the scales for each cylinder.

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Measuring a solid

Images created at http://www.standards.dfes.gov.uk/primaryframework/downloads/SWF/measuring_cylinder.swf

All we have to do to find the volume is:

Record starting volume.
Drop the object in.
Record the new volume.
Subtract your start volume

from final volume

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Metric Mini-Lab (Volume) 9/22

Find the volume of the 3 objects at your table!

Record the volumes in your notebook! :)

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Bellwork 9/23

Connect the words to their associated phrase/word.

Meter
Mass
Volume
Metric
Standard sys.

Easy x10
Liter
Length
Gram
Trash

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Yes this is Comic Sans…

We are playing Review

Basketball Today :) for

FUN FRIDAY!!

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Bellwork 9/27

Even though these are about the same size, why would one sink/float on water?

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Finding Density

Less Dense

More Dense

Density- is an object’s mass/volume, or how tightly packed it’s matter is.

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Finding Density

Less Dense

More Dense

Steps to find an object’s density:

You first need to find its mass.
Then you need to find its volume.
Finally divide mass/volume
Profit :)

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Finding Density

Density- is an object’s mass/volume, or how tightly packed it’s matter is.

Make a table like this →

Aluminum

Copper

Brass

Steel

Name	Mass	Volume	Density (mass/volume)
Object 1
Object 2
Object 3
Object 4

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Finding Density

Density- is an object’s mass/volume, or how tightly packed it’s matter is.

Aluminum/ Density 2.7 g/mL

Copper/Density 8.96 g/mL

Brass 8.5 g/mL

Steel 7.8 g/mL

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Bellwork 9/28

Get ready for the Notebook Check 2!

Bellwork: 9/19, 9/21, 9/23

Notes: Metric Handout

Labs:MetricMiniLabs: Length, Volume, and Density

Vocab: Density, Volume, Mass (only 3!)

https://www.schooltube.com/media/Bill%20Nye%20-%20Atoms/1_k7dvbaam

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