Transcript Measurement-A Common Language
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
.
One kilogram is little more than 2 pounds (2.2 lbs.)
What are some objects whose masses can be measured in kilograms.
Car
Teacher’s Desk
Desk Top Computer Coolest Car Ever
Can you think of other objects?
:
Smaller objects are measured in grams or g Ex: Such as a paper clip
Medications milligrams or mg Ex: are measured in 1 Ibuprofen tablet = 200 mg
Mass units
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 = 1000 10 = 100 paperclips
Measuring Mass
How do we measure mass?
We can use a scale We can use a triple-beam balance
Label the different parts of the triple-beam 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
Volume is the amount of matter and space an object takes up
Object can be solid Ex: Rock
Object can be liquid : Ex: Juice
Object can be gas : Ex: Air
When measuring the volume of a liquid, scientists use the…………
Liter (L).
Remember; Milli = 1/1000 or one-thousandth
To measure the volume of smaller liquids, the _________ is used.
Milliliter (mL)
How many milliliters in one liter? 1000 Milliliters
Problem
The Coke bottle is 2 liters How many milliliters is that?
2 x 1000 = 2,000 ml
Problem
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
What are these called?
Graduated Cylinders What do we measure with graduated cylinders?
Volume Which metric units are used to measure Volume?
Liters and milliliters
The curve on the top surface of water in the graduated cylinder is called?
Meniscus
Observing How do we measure volume?
We look at the Meniscus
What is it?
The curve on the top surface of water
How much water is in this Graduated Cylinder?
53 milliliters or 53 ml Bonus: Where did the cylinder graduate from?
Laboratory Equipment
What is this equipment called?
A Beaker
What is the Volume of this Beaker?
250 milliliters or ml
What is Volume ?
The amount of matter and space as an object takes up
Laboratory Equipment
Beakers come in assorted sizes: 10 ml 50 ml 100 ml 250 ml 500 ml 1000 ml 2000 ml Which beaker is 2 liter or 2L?
Which beaker is .50 liter or .50L?
Which beaker is .10 liter or .10L?
2000 ml 500 ml 100 ml
REVIEW QUESTIONS 1 . What is weight?
Answer 2. What is Mass?
Answer 3. What is the basic unit of Mass?
Answer 4. What is the basic unit of Volume?
Answer 5. What can we use to measure volume?
Answer 6. How do we measure volume?
Answer Answer : The amount of gravitational pull on an object : The measure of the amount of matter an object has : The Kilogram or kg : The liter or L : Graduated Cylinder and the Beaker : We use the Meniscus 7. What is the meniscus?
: The curve on the top surface of water