# You will have 4 minutes to answer the questions on the next slide.

## Presentation on theme: "You will have 4 minutes to answer the questions on the next slide."— Presentation transcript:

You will have 4 minutes to answer the questions on the next slide

Bellringer 9-17-09 A gram is about the mass of one _____ A big bottle of Coke is about 2 ______ We measure length using a ____ To find the mass of a car we would use ______ To find the height of a doorway we would use _____ To find the amount of water in a fish tank we would use _____

Cornell Notes We will be taking all our notes in Biology in the Cornell notetaking format

Metrics

Metric System Scientific Measurements

Metric System Used by almost every country in the world, with the notable exception of the USA. Used by almost every country in the world, with the notable exception of the USA. Especially used by scientists. Especially used by scientists. Abbreviated SI, which is French for System International. Abbreviated SI, which is French for System International.

Metric prefixes Kilo- (k) Kilo- (k) Hecto- (h) Hecto- (h) Deca- (dk) Deca- (dk) Meter or Liter or Gram (m, l, g) Meter or Liter or Gram (m, l, g) Deci- (d) Deci- (d) Centi- (c) Centi- (c) Milli- (m) Milli- (m) Up to bigger units of measurement Down to smaller units of measurement

Metric prefixes KiloKing KiloKing HectoHenry HectoHenry DecaDied DecaDied Meter or Liter or GramMonday Meter or Liter or GramMonday DeciDrinking DeciDrinking Centi Chocolate Centi Chocolate MiliMilk MiliMilk

Metric Prefixes Common prefixes are: Common prefixes are: kilo = 1000 centi = 1/100 th milli = 1/1000 th 1 meter = 100 centimeters= 1000 millimeters

No Naked Numbers No Naked Numbers

Meter Used to measure length (distance between two points.) Used to measure length (distance between two points.) We use meter sticks to find the length of objects. We use meter sticks to find the length of objects.

Gram Used to measure mass (the amount of matter that makes up an object) Used to measure mass (the amount of matter that makes up an object) A golf ball and a ping pong ball are the same size, but the golf ball has a lot more matter in it. So the golf ball will have more mass. A golf ball and a ping pong ball are the same size, but the golf ball has a lot more matter in it. So the golf ball will have more mass. A large paper clip has a mass of about one gram. A large paper clip has a mass of about one gram.

Gram We will use a triple beam balance scale or a electronic scale to measure mass. We will use a triple beam balance scale or a electronic scale to measure mass.

Liter Used to measure volume _ the amount of space contained in an object. (liquid and gas) Used to measure volume _ the amount of space contained in an object. (liquid and gas) We measure volume with a graduated cylinder. We measure volume with a graduated cylinder.

Other measurements Temperature is measured by a thermometer in degrees Celsius ( o C) Temperature is measured by a thermometer in degrees Celsius ( o C) Time – is measured by seconds, hours, days, centuries, etc. Time – is measured by seconds, hours, days, centuries, etc.

Graduated Cylinders Liquids form curved, upper surfaces when poured into graduated cylinders Liquids form curved, upper surfaces when poured into graduated cylinders To correctly read the volume, read the bottom of the curve called the meniscus To correctly read the volume, read the bottom of the curve called the meniscus

Laboratory Equipment

Test Tube

Beaker

Electronic scale

Meter Stick

Thermometer

Safety glasses

Gloves