Notes - Observation and Measurement Observation: The Basis of Scientific Research Observation is ________________________________________________________________ All scientists have a certain way of ______________________________________ the world. Scientific investigations begin with _____________________________________. Observations cause scientists to _________________________________________ Qualitative observations use _________________________________, such as, color, shape, texture, odor, etc. Using scientific tools There are many tools used by scientists for making observations, including microscopes ____________________________ spectroscopes particle ______________________________ computers Units of Measurement SI units are used for ______________________. • Scientists use the International System of Units (SI) to make ____________________________________________________________________ SI (Le Système Internationale d’Unités) SI prefixes are for ________________________ and _________________________ measurements. Making measurements Many observations rely on _________________________________ measurements. Quantitative observations are based on _______________________________. o Length a measure of the straight-line distance between _______________________________ o Mass a measure of the amount of ____________________________ in an object o Volume a measure of the size of a body or region in _________________________________ o Weight a measure of the _____________________________________ exerted on an object Math Skills Conversions A roll of copper wire contains 15 m of wire. What is the length of the wire in centimeters?