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: How would a standard system of weights and measures, agreed to and used around the world, make life easier? Give examples.
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.
