Physical Science Chapter 1 Exploring Physical Science Science
- Slides: 26
Physical Science Chapter 1 Exploring Physical Science
Science • Process of gathering knowledge about the natural world
Physical Science • Study of matter and energy
Matter • Stuff that everything is made of
Energy • Ability to do work
Two Categories • There are two categories of physical science: chemistry physics
Chemistry • Study of all forms of matter including how matter interacts with other matter • It is also the study of how substances change
Physics Studying different forms of energy
Scientific Method • Ways in which scientists answer questions and solve problems
Scientific Method 1. 2. 3. 4. 5. 6. 7. Ask a question Make observations Form a hypothesis Test the hypothesis Analyze the results Draw conclusions Communicate results
Asking a question • Usually after some observation
Observation • Any use of the senses to gather information
Hypothesis • Possible explanation or answer to a question • Good hypothesis is testable…can gather information or test the hypothesis
Controlled experiment • Compares the results from a control group with results from experimental group • All variables are the same except for one
Spallanzani
Pasteur
data • Any pieces of information acquired through experimentation
Scientific Models • Model- representation of an object or system • Three types 1. Physical 2. Mathematical 3. conceptual
Theory • Explanation for many hypotheses and observations
law • Summary of many experimental results and observations • Tells you how things work
Measurements • International system of units • Used to express units of 10 formed in the 1700’s • Used so that all scientists around the world will know the exact measurements without having to convert
length • Meter is the basic SI unit
Mass • Amount of matter in an object • Kilogram is the basic SI unit
Volume • Amount of space that something occupies • Liquid volume is expressed in liters • Solid objects are expressed in cubic meters
Density • Amount of matter in a given volume • Use the formula D=m/v • Derived quantity (found by combining two basic quantities)
Temperature • Measurement of how hot or cold a substance is • SI unit is Kelvin