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.