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CHAPTER 1
INTRODUCTION TO SCIENCE
1.1 Science is part of everyday life
a.Science: The knowledge of things that happen in nature.
b.Natural phenomena: Events that occur naturally in the world that can explained through science knowledge. Example: formation of rainbow, tsunami, the melting of ice, the growth of plants.
The importance of science in everyday life
HOTS!!! Application in human's everyday life (TECNOLOGY) •communication - •agriculture - •medicine - •transportation -
textbook pg 4-5
careers related to science
dentist
engineer astronomer
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1.2 Your Science Laboratory
Laboratory safety rules
Accidents can happen if we are careless!!!
Do's and don'ts in the lab
textbook pg 8 (figure 1.2)
Hazardous substances found in the laboratory
Diagram Example Explaination
Poisonous
mercury, bromine, sodium cyanide
causes death or harm if absorbed through the skin, swallowed or inhaled
Flammable
ethanol, petrol, kerosene burns easily
Corrosive
Irritant
Radioactive
Explosive
• Use hazard warning symbols to show the danger of the substances.
• On the labels of bottles in the lab.
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