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Tools , measurements, and Safety

Introduction to Science. Tools , measurements, and Safety. Objectives:. Identify tools used to collect and analyze data. Explain the importance of the International System of Units. Identify the appropriate units to use for particular measurements. Identify safety symbols. Bellringer :

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Tools , measurements, and Safety

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  1. Introduction to Science Tools , measurements, and Safety

  2. Objectives: • Identifytools used to collect and analyze data. • Explainthe importance of the International System of Units. • Identifythe appropriate units to use for particular measurements. • Identifysafety symbols. • Bellringer: • List 5 measuring tools used in science for solids and liquids?

  3. Tools in Science • To get the best measurements • You need the proper tools. • Stopwatches • Metersticks • Thermometers • Balances • Tools are also used to: • analyze data. • Calculators • Computers • Even pencils and paper

  4. Making Measurements • The International System of Units (SI) • current name for the metric system. • Used by most scientists and almost all countries. • All SI units are based on the number 10. • Length • SI unit - meter(m).

  5. Mass • Amount of matter that something is made of • SI unit - kilogram (kg) • Volume • Amount of space that something occupies. • Liquids - liters(L) or milliliters(mL) • Solids - cubic meters (m3), cubic centimeters (cm3)

  6. m a s s d e n s i t y = v o l u m e • Density • Amount of matter in a given volume • SI unit – gram per milliliter (g/mL) or grams per cubic centimeter(g/cm3). • Derived quantity! • Temperature • measure of how hot (or cold) something is. • Scientists often use degrees Celsius (°C) as the unit. • SI base unit - Kelvins (K)

  7. Safety Rules • Always follow your teacher’s instructions. • Read lab procedures carefully and thoroughly. • Pay special attention to safety information and know the safety symbols.

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