NOTEBOOK NI ANGEL

There are four types of forces: Gravitational Electromagnetic Weak Nuclear Strong Nuclear

Science: Motion Motion is an act of changing position with respect to a reference point. It can be measured by: speed (scalar quantity) – m/s, km/hr, mi/s (magnitude)  velocity (vector quantity) – m/s eastward (magnitude direction)  acceleration – m/s 2 , km/hr 2 Laws of Motion Law of Inertia The resistance to change in motion Law of Acceleration directly proportional with force and inversely proportional with mass; a=F/m Law of Interaction for every action, there is equal / opposite reaction Law of Universal Gravitation G=6.67 x 10 -11 F=GM 1 M 2 /d 2 W=mg

Science: Astronomers and their Contributions Ptolemy, Claudius – Geocentric model (earth-centered) Copernicus, Nicholaus – Heliocentric model (uniform circular motion) Tycho Brahe – astronomical instrument Johannes Kepler – Law of Orbit, Law of Equal Areas, Law of Period Galileo Galilei – telescope, thermometer, compass, pendulum, satellite of Jupiter Isaac Newton – Law of Inertia, Law of Acceleration

Measurement is a process of comparing unknown quantity with a standard. (7) Seven Fundamental Quantities 1. length – meter 2. mass – kilogram 3. time – seconds 4. temperature – Kelvin 5. amount of substance – mole 6. electric current – ampere 7. luminous – candela

The Scientific Method Identify the problem Observation Senses (quality) Measure (quantify) Gather data (table, chart, graph, diagram) Formulate the Hypothesis (wise guess) Experiment Independent variable Dependent variable Interpret Draw Conclusion Recommendation/Application