Measurement-A Common Language Mass

Mass  Mass is the measure of the amount of matter an object has  Matter: The material that all objects are made up of  What is the difference between mass and weight?  Weight is the amount of gravitational pull on an object

The basic unit of mass is the…  The basic unit of mass is the kilogram. kilogram.  One kilogram is little more than 2 pounds (2.2 lbs.) 2 pounds (2.2 lbs.)

What are some objects whose masses can be measured in kilograms.  Car  Teacher’s Desk  Desk Top Computer  Can you think of other objects? objects? Coolest Car Ever

:  Smaller objects are measured in grams or g measured in grams or g Ex: Such as a paper clip Ex: Such as a paper clip  Medications are measured in milligrams or mg milligrams or mg Ex: 1 Ibuprofen tablet = 200 mg Ex: 1 Ibuprofen tablet = 200 mg

Mass units OOOOne kilogram is…………grams? 1000 grams Problem: If a paper clip is 10 grams, how many will you need to have 1 kilogram of paperclips 1000 divide by 10 = = 100 paperclips

Measuring Mass  How do we measure mass?  We can use a scale  We can use a triple-beam balance balance

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 Volume of Liquids

Volume VVVVolume is the amount of matter and space an object takes up OOOObject can be solid Ex: Rock OOOObject can be liquid: Ex: Juice OOOObject can be gas: Ex: Air

When measuring the volume of a liquid, scientists use the…………  Liter (L).  One liter is……………Milliliters Remember; Milli = 1/1000 or one-thousandth one-thousandth 1000

To measure the volume of smaller liquids, the _________ is used.  Milliliter (mL)  How many milliliters in one liter? 1000 Milliliters 1000 Milliliters

Problem  The Coke bottle is 2 liters How many milliliters is that? How many milliliters is that? 2 x 1000 = 2,000 ml

Problem TTTThe Minute Maid soda is half a liter (1/2) How many milliliters is that? 500 ml

The instrument used to measure the volume of liquids is called the…  Graduated cylinder

Laboratory Equipment WWWWhat are these called? GGGGraduated Cylinders WWWWhat do we measure with graduated cylinders?  V V V Volume WWWWhich metric units are used to measure Volume? LLLLiters and milliliters

 The curve on the top surface of water in the graduated cylinder is called? Meniscus Meniscus

Observing- How do we measure volume? WWWWe look at the Meniscus WWWWhat is it? TTTThe curve on the top surface of water HHHHow much water is in this Graduated Cylinder? 53 milliliters or 53 ml Bonus: Where did the cylinder graduate from?

Laboratory Equipment WWWWhat is this equipment called? AAAA Beaker WWWWhat is the Volume of this Beaker? 222250 milliliters or ml WWWWhat is Volume? TTTThe amount of matter and space as an object takes up

 B eakers come in assorted sizes:  1 0 ml  5 0 ml  1 00 ml  2 50 ml  5 00 ml  ml  ml WWWWhich beaker is 2 liter or 2L? WWWWhich beaker is.50 liter or.50L? WWWWhich beaker is.10 liter or.10L? 2000 ml 500 ml 100 ml Which beaker is

REVIEW QUESTIONS 1. What is weight? Answer: The amount of gravitational pull on an object 2. What is Mass? Answer: The measure of the amount of matter an object has 3. What is the basic unit of Mass? Answer: The Kilogram or kg 4. What is the basic unit of Volume? Answer: The liter or L 5. What can we use to measure volume? Answer: Graduated Cylinder and the Beaker 6. How do we measure volume? Answer: We use the Meniscus 7. What is the meniscus? Answer: The curve on the top surface of water