Bell Ringer: On a half sheet of paper please answer the following questions. 1.What is the definition of Biology? 2.Define Metabolism 3.What is an example of an organism that reproduces Asexually? 4.What is the smallest unit of Life? 5.Define Differentiation 6.Define Evolution

Joke of the Day:

Unit 1: Metric System A Common Language

Why A Standard Measurement System?

When and why was the metric system invented? Invented in 1790 Invented because countries were using many different systems of measurement causing confusion and lack of consistency –aunes, cubits, leagues, palms, stadia, furlongs, rods, pecks

Who invented the metric system? Several scientists contributed to the idea but finalized by a group of French scientists

Metric System A Standard Decimal System of Measurement used by most countries. Countries that don’t use the Metric System… Liberia, Myanmar, and United States Also called…. “The International System of Units” “System International (SI)”

Scientists all over the world use the International System of Units to measure: Length Volume Mass Density Temperature Time

Key Concept: Why do scientists use a standard measurement system? Allows scientists to compare data and communicate with each other about their results Also allows experiments to be repeated and most importantly achieve a desired result

Length

What is length? Length is the distance from one point to another

Length Units of Length

The basic unit of length in the Metric System is the … Meter (m)

Length Measuring Length Tools: Meter Stick and Ruler

The longer lines on the metric ruler are called… centimeters

The shorter lines on the metric ruler are called… millimeters

Figure 2: Calculating: Measure the turtle in figure 2 from the rear of its shell to the front of it’s shell. Record its length in both centimeters and millimeters. 8.8 cm 88 mm

Mass

The measure of the amount of matter an object contains

Mass Units of Mass

The basic unit of mass in the Metric System is the… Gram (g)

Mass Measuring Mass Tool: Triple Beam Balance

How does a triple-beam balance work? A triple-beam balance works by comparing the mass of the object you are measuring to a known mass When you use a triple-beam balance, you: 1.Place the object on the pan 2.Shift the riders on the beams until them balance the mass of the object Start with the large rider (increments of 100) Next, the medium sized rider (increments of 10) Lastly, the small rider (increments of 1)

Figure 3: Observing - What is the mass of this turtle? grams

Why would your mass stay constant if you were to travel to the moon? Your mass would stay the same if you were to travel to the moon because mass is the amount of matter that an object contains Since you are still made up of the same amount of “stuff”, your mass would not change

Why do scientists prefer to use the mass of an object instead of its weight? Scientists prefer to use an objects mass instead of its weight because mass does not change when the force of gravity does

Label the different parts of the triple-beam balance.

Pan

Label the different parts of the triple-beam balance. Pan Riders

Label the different parts of the triple-beam balance. Pan Riders Beams

Label the different parts of the triple-beam balance. Pan Riders Beams Pointer

Volume

The amount of space an object takes up

Volume Volume of Liquids

The basic unit of volume in the Metric System is the… … Liter (l)

The Tool used to measure the volume of liquids is called the… Graduated cylinder.

This instrument has markings that are in increments of… 1 milliliter (mL)

Meniscus The curve in the top surface of water in the graduated cylinder

Figure 4: Observing - What is the proper way to read a meniscus? Read the milliliter marking at the bottom of the curve

Volume Volume of Rectangular Solids

How can the volume of a solid object such as a shoebox be measured? To measure a solid objects that are regular shaped, a formula for volume can be applied To measure a rectangular object such as a shoebox, multiply the object’s length, width, and height

The Metric System unit known for measuring solids with a larger volume is known as the… Cubic meter (m³) Cubic centimeter (cm 3 ) Cubic millimeter (mm 3 ).

Tool: The formula for calculating the volume of a rectangular object is: Volume = Length x Width x Height

Why is the unit cm³ used when calculating the volume of a rectangular object? When multiplying the object’s length, width and height, the cm units are also multiplied cm x cm x cm = cm³

Suppose a cereal box is 10 centimeters long, 4 centimeters wide, and 20 centimeters high. What would be the volume of the box? Volume = Length x Width x Height Volume = 10 cm x 4 cm x 20 cm Volume = 800 cm³

Volume Volume of Irregular Solids

How is the volume of an irregular solid such as a rock measured? To measure the volume of an irregular solid, immerse the object in water, and measure how much the water level rises Tool (Method) : Water displacement method using a Graduated Cylinder

Basic Unit of Volume for Irregular Solids = L 3 cL 3 mL 3

How does the water displacement method work? Record the volume of water in the graduated cylinder Carefully place the irregular solid into the water. Record the volume of the water plus the object Subtract the volume of the water alone from the volume of the water plus the object

To convert to a larger unit, move the decimal point to the left Basic Unit 1 Meter 1 Liter 1 Gram To convert to a smaller unit, move the decimal point to the right Kilo 1000 Units Hecto 100 Units Deka 10 Units Milli.001 Units Centi.01 Units Deci 0.1 Units King Henry Died Basically Drinking Chocolate Milk

TRY THIS USING THE STAIRCASE METHOD 1000 mg = ______ g Step 1: Determine if you are going to go up or down the ladder. Step 2: Determine how many steps there are from milligrams to grams. Step 3: Move the decimal point the amount of places that was determined in steps 1 & 2. 1

TRY THIS USING THE STAIRCASE METHOD.15 L = __________ ml

TRY THIS USING THE STAIRCASE METHOD.15 L = __________ ml 150

1.What are the basic units of measurements for Length Volume Mass 2.Convert 1.5 km to m 3.Convert 120 ml to cl 4.What tool would you use to measure mass? 5.What is the formula for figuring volume of an rectangular shaped object? Bell Ringer