Presentation on theme: " When we measure you need to know: › What you are measuring (the object) › What you are measuring with (which tool) › What you are measuring in (the."— Presentation transcript:
When we measure you need to know: › What you are measuring (the object) › What you are measuring with (which tool) › What you are measuring in (the units) If you don’t use units, I won’t know what you are talking about!
What does it measure? › Distance between two points Can measure VERY tiny objects Can measure great distances What tools do we use? › Metric Ruler › Meter stick What units do we use? › SI base unit is the meter
Use the ruler to measure the items at your lab station. Record your measurements on your notes. Use the meter stick to measure the height of your desk.
How much space an object takes up Two ways to measure volume › Length x width x height Only if it is square or rectangle › Volume by Immersion Place the object into a beaker of water and subtract to find the volume.
What tools do we use? › Rectangular objects Ruler Meter Stick › Irregular objects Beaker (immersion) What units do we use? › There are 3 units we use in this class Meter cubed (m 3 ) Centimeter cubed (cm 3 ) Milliliters (mL)
Use the ruler to measure the length width and height of items at your lab station. Multiply the numbers to find the volume. Record your measurement on your notes. Read the volume in the beaker Practice immersion technique using the bead and the graduated cylinder
Measures how much matter is in an object › Mass does not change when you change location What tools do we use? › Triple Beam Balance › Pan Balance › Electronic Balance What units do we use? › The SI unit for mass is kilogram
Use the balances at your station to measure each item › Triple beam balance to find the mass of the wooden block. › Pan balance to find the mass of the ball.
Measures the amount of force (gravity) acting on an object › Your weight can change depending where you are What tools do we use? › Spring Scale What units do we use? › The SI unit for weight is Newton (N)
Use the spring scales at your station to: › Measure the weight of the wood block with this scale.
How hot or cold something is › Measures the kinetic energy (energy of motion) of an object. What tools do we use? › Digital thermometer › Alcohol thermometer What units do we use? › The SI unit for temperature is Kelvin › However, we use Celsius in class
Use the thermometers by the reading center to measure the following: Record your measurements on your notes. › Digital thermometer: beaker of water › Alcohol thermometer: body temperature (hold it in your closed hand)
The interval between 2 events › Time can also measure rate What tools do we use? › Stop watch What units do we use? › The SI unit for time is seconds
Using the stop watch at your station, measure the following. Record your measurements on your notes. › How long it takes you to walk from the front of the room to the back of the room.
What are the 6 things we will measure in here? Why is it important to use units when writing down measurements?