Monday September 14 2015 Tuesday September 15 2015

Monday, September 14, 2015 Tuesday, September 15, 2015 Unit Question How do we “do” science? Guiding Question / I will be able to use measure different objects using the metric Learning Target system. Warm-up How tall are you in feet and inches? How tall are you in centimeters? Agenda 1. Organization 2. Metric Notes 3. Metric Lab ` Homework/ Reminders 1. Syllabus due today for extra credit! 2. Turn syllabus in by Friday so I don’t have to call home! 3. MEASUREMENT QUIZ FRIDAY!

Warm-Ups • Daily participation points – 3 pts/day • Collected on last day of the week (usually Fridays) • Need to write down Learning Target, Warm Up, Agenda, and Exit Question. • Be sure to write the question AND answer for the warm up and exit question. • Answers given in the first few minutes of class. Be here on time and ready!

“on time? ” • In the room before the bell • In your seat with the warm ups, assignment, and pen/pencil situated. Be ready to go!

Guide to the Metric System and Measuring Tools

Metric System Base Units • For Liquids, use Liters/Litres (L) • For Weight, use Grams (g) • For Distance, use Meters/Metres (m)

Metric System Prefixes: • • • mega- (M) kilo- (k) hecto- (h) deka- (da) (Base Unit) deci- (d) centi- (c) milli- (m) micro- (u) 1 000 x 10 x 1 x 0. 1 x (1/10) 0. 01 x (1/100) 0. 001 x (1/1000) 0. 000 001 x

Metric System Prefixes: • Take your prefix, and add it to your base unit: Milliliter (m. L) Milligram (mg) Millimeter (mm)

Metric System Prefixes: In addition to base unit, which do we usually use to measure liquid volume? • • • mega- (M) kilo- (k) hecto- (h) deka- (da) (Base Unit) deci- (d) centi- (c) milli- (m) micro- (u) 1 000 x 10 x 1 x 0. 1 x (1/10) 0. 01 x (1/100) 0. 001 x (1/1000) 0. 000 001 x

Metric System Prefixes: In addition to base unit, which do we usually use to measure distance? • • • mega- (M) kilo- (k) hecto- (h) deka- (da) (Base Unit) deci- (d) centi- (c) milli- (m) micro- (u) 1 000 x 10 x 1 x 0. 1 x (1/10) 0. 01 x (1/100) 0. 001 x (1/1000) 0. 000 001 x

Metric System Prefixes: In addition to base unit, which do we usually use to measure mass? • • • mega- (M) kilo- (k) hecto- (h) deka- (da) (Base Unit) deci- (d) centi- (c) milli- (m) micro- (u) 1 000 x 10 x 1 x 0. 1 x (1/10) 0. 01 x (1/100) 0. 001 x (1/1000) 0. 000 001 x

Tools we use for liquid volume: Graduated Cylinder: Most commonly used Different sizes available

Tools we use to measure liquids: Beakers: Can be graduated (marked with a scale). Sometimes used for measuring. Wide at top and with spout. Flasks: Narrow at the mouth. Can be graduated. Not often used for measuring.

Tools we use to measure liquids: Pipettes. Used for small amounts of liquid. The center one is what we use most often in class.

Tricks to measure liquids: • Place the container on a level surface! • Get EYE LEVEL with the liquid: • Measure from the bottom of the meniscus (curve) • There is not always a meniscus, read from the middle of the liquid line.

Tools we use to measure distance • Rulers: • Meter sticks: • NOTE: Not all meter sticks in this class are meters. Some are yardsticks because they are cheaper and easier to find in the US. CHECK YOUR LENGTH before you use. One meter is 100 cm.

Tips for measuring distance: • Find the zero. Some rulers have a lead in to maintain precision (the ends get damaged). If your end is damaged, start at a clear demarcation instead of the end, and do the math. This ruler starts measuring from the end. Use the end to measure. This ruler does not start at the end. Measure from the first line. This ruler is broken, but can still measure. Start from a clear line (13) and go from there. Either count or subtract your starting point (13). If the end of your ruler is damaged, do the same.

Tools we use to measure Mass: Pan Balance Triple-beam Balance Electronic Balance

Tips for measuring mass: • ZERO your balance! Every time, before you start! • For mechanical balances, put your eyes level with the balance mark.

Formulas • Volume: • L · W · H

Volume By Displacement: • • Fill your graduated cylinder with water, measure and record. Gently submerge the object. Record new water level. New level - starting level = volume of object

Density • m/v • I m V density

Exit Question • Why do we need to learn the metric system in this class?