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**Name 5 things you want to learn about in science class this year!!!**

Bell Work 8/17/2009 Name 5 things you want to learn about in science class this year!!! ****Write these 5 down in your science journal. Please make sure to have the date and title, which is Bell Work 8/17/2009

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**Metric System Referred to as the International system of units or SI**

Based on the number 10 Measuring system used by all scientist Used to measure length, volume, mass, weight, density, and temperature.

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**Length 2. Basic unit of length is the meter (m) Kilometer-km**

1. Used to measure from one point to another 2. Basic unit of length is the meter (m) Kilometer-km Hectometer-hm Dekameter-dam Meter-m: base unit Decimeter-dm Centimeter-cm Millimeter-mm In space, distance is measured in Light Years!! a. This is the distance light travels in a year.

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Bell Work Today we’re going to begin learning how to measure objects using a ruler or meter stick. Your task on the bell work is to write/explain to me the procedure (steps to follow) for using a ruler or meter stick. Be as detailed or specific as you can be!!!

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**Volume Volume is the amount of space an object takes up.**

Basic unit of volume is the liter(L) Kiloliter-kL Hectoliter-hL Decaliter-daL Liter-L: base unit Deciliter-dL Centiliter-cL Milliliter-mL

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**Volume Continued Large amounts of liquids are measured in liters**

Small amounts are measured in mL (milliliter) Solids are measured in cubic centimeters **To calculate the volume of a solid** L x W x H= ____ cm³ 6. Most often used are the mL and the L.

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**Mass Mass is the amount of matter in an object.**

Basic unit of mass— gram (g) Large objects are measured in Kilogram (kg)

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Mass Continued Small objects are measured in grams (g) or milligrams (mg). Kilogram-kg hectogram-hg dekagram-dag gram-g decigram-dg centigram-cg milligram-mg 5. Most often used are the kg, g, and the mg.

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Weight Weight is the measure of attraction between objects due to gravity. Basic unit of weight is the Newton (N)

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**Density Shows a relationship between mass and volume**

To calculate density we divide mass by volume Units for density depend on size of object Large objects=kg/L (slash means per) Small objects=g/mL (slash means per)

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**Temperature Measured in degrees Celsius: °C**

Freezing= 0 degrees Celsius Boiling = 100 degrees Celsius

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**Tools for measuring A metric ruler is used to find length**

A graduated cylinder is used to find the volume of a liquid or an irregular solid. A metric ruler is used to find the volume of a rectangular object. A triple beam balance is used to find the mass of an object.

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**Definitions of Prefixes**

Kilo—1000 Hecto—100 Deka—10 Basic unit: meter (m), liter (L), gram (g) Deci-- .1 or 1/10 Centi or 1/100 Milli or 1/1000

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