Presentation on theme: "Metric System I will be able to measure and record data using a variety of SI units. Metric units are related to decimals by multiples or divisions of."— Presentation transcript:
Metric System I will be able to measure and record data using a variety of SI units. Metric units are related to decimals by multiples or divisions of ten.
What is the metric system? The first standardized system of measurement, based on the decimal, was proposed in France about 1670. It was created to develop a universal system of measurement. It was called the "metric" system, based on the French word for measure. As of 2005, only three countries, the United States, Liberia, and Myanmar, have not changed over to the metric system. The official modern name of the metric system is the International System of Units or abbreviated SI.
What are the metric measurements that we are learning about? Meter Length Liter Volume Gram Weight or Mass
What is the order of the metric system? King Henry Died by Drinking Chocolate Milk King: Kilo 1000 Henry: Hecto 100 Died: Deca 10 By: Base (m, L, g) Drinking: Deci.1 Chocolate: Centi.01 Milk: Milli.001
How to remember different lengths in the metric system: When you think of a millimeter (mm) think of: The thickness of a dime. When you think of a centimeter (cm) think of: The width of your pinky.
How to remember different lengths in the metric system: When you think of a meter (m) think of: The height of the doorknob. When you think of a kilometer (km) think of: A little more than half of a mile
How to understand the ruler: One side has inches (duh!) The other side is the metric side. The big numbers represent centimeters The smaller lines represent millimeters. How many millimeters are in a centimeter? 10
With the group you will be put into, use a meter stick to measure the items on your chart. Be sure to measure in meters, centimeters, and millimeters.
English vs. Metric Which is longer? 1.1 mile or 1 kilometer 2.1 yard or 1 meter 3.1 inch or 1 centimeter 1.6 kilometers 1 mile 1 inch = 2.54 centimeters 1 yard = 0.9444 meters
Mass a measure of the amount of matter in an object Kilogram – the basic unit of mass in the metric system 1 kg = 1000 grams Gram – one thousandth of a kilogram 1 g = 1/1000 kg = 0.001 kg 1000 g = 1 kg Milligram – one thousandth of a gram 1 mg = 1/1000 g = 0.001 g 1000 mg = 1 g
Mass vs. Weight An object has a universal mass, but may have different weight depending on gravity. The mass of an object does not change. The weight of an object changes as a result of changes in gravity. A pineapple on earth weighs more than on the moon because the earth ’ s gravity is greater. But the pineapple ’ s mass always remains the same wherever you go (unless you get hungry and eat it!).
Weight a measure of the attraction between two objects due to gravity Gravity - a force of attraction between two masses. The strength of the gravitational force between two objects depends on the masses of the objects and the distance between them: a)The greater the mass, the greater the gravitational force. b)The greater the distance between the two objects, the weaker the gravitational force between them Newton (N) - the basic unit of weight in the metric system.
English vs. Metric Units Which is larger? 1. 1 Pound or 100 Grams 2. 1 Kilogram or 1 Pound 3. 1 Ounce or 1000 Milligrams 1 pound = 453.6 gram 1 ounce of gold = 28,349.5 milligrams 1 kilogram = 2.2 pounds
Metric Units 1 Kilogram (km) = 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
How to remember different masses in the metric system: When you think of a gram (g) think of: A paper clip When you think of a kilogram (kg) think of: A little more than 2 pounds.
Measuring Mass 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
How to remember different volumes in the metric system: When you think of a liter (L) think of: About the size of a bottle of water. When you think of 5 milliliters (mL) think of: One teaspoon When you think of 2 kiloliters (kL) think of: A hot tub
English vs. Metric Units Which is larger? A. 1 liter or 1 gallon B. 1 liter or 1 quart C. 1 milliliter or 1 fluid ounce 1 12-oz can of soda would equal approximately 355 ml. 1 fl oz = 29.573 ml 1 gallon = 3.79 liters It would take approximately 3 ¾ 1-liter bottles to equal a gallon 1 quart = 0.946 liters
Metric Units 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 cm 3 (or cc) = 1 gram* Which is larger? A. 1 liter or 1500 milliliters B. 200 milliliters or 1.2 liters C. 12 cm 3 or 1.2 milliliters*
Measuring Volume We will be using graduated cylinders to find the volume of liquids and other objects. 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. 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
Measuring Liquid Volume What is the volume of water in each cylinder? Pay attention to the scales for each cylinder.
Measuring Solid Volume 10 cm 9 cm 8 cm We can measure the volume of regular object using the formula length x width x height. _____ X _____ X _____ = _____ http://resources.edb.gov.hk/~s1sci/R_S1Scienc e/sp/en/syllabus/unit14/new/testingmain1.htm We can measure the volume of irregular object using water displacement. Amount of H 2 O with object = ______ About of H 2 O without object = ______ Difference = Volume = ______
Measurement Conversions to Know: 1 m = 100 cm 1 cm = 10 mm 1 m = 1,000 mm 1 km = 1,000 m 1 g = 100 cg 1 cg = 10 mg 1 g = 1,000 mg 1 kg = 1,000 g 1 L = 100 cL 1 cL = 10 mL 1 L = 1,000 mL 1 kL = 1,000 mL