1. Ch.1 Introducing Science Science is divided into many branches, some of the examples are: Physics,Chemistry,Biology,Astronomy, Geology and Ecology Branches of Science

2. Ch.1 Introducing Science Scientific Investigation Scientific investigation consists of five steps, they are: Step 1: Make Observations Step 2: Make a hypothesis Step 3: Carry out experiment(s) Step 4: Record and analyse Step 5: Draw a conclusion

3. Ch.1 Introducing Science Laboratory Equipments ( 設備 ) Laboratory Equipments ( 設備 ) Science laboratories are equipped with a lot of equipments so that we can carry out experiments properly ( 適當地 ). Some of the examples are: Science laboratories are equipped with a lot of equipments so that we can carry out experiments properly ( 適當地 ). Some of the examples are: Gas tap, …...

4. Ch.1 Introducing Science Moreover, there are also a number of safety equipments. For example: First aid box, ……..

5. Ch.1 Introducing Science When carrying out experiments, we may also need to use some apparatus. Laboratory Apparatus ( 儀器 ) Laboratory Apparatus ( 儀器 ) Apparatus dropper Function reagent bottle conical flask, beaker to a small amount of liquid to store to hold

6. Ch.1 Introducing Science Apparatus Function spatula glass rod to transfer a small amount of to liquids Bunsen burner to things heat-proof mat to protect the safety spectacles to protect your tongs to pick up and hold objects

7. Ch.1 Introducing Science Apparatus Function measuring cylinder gas jar to measure the of liquids to hold test tube to hold a small amount of test tube holder to hold a during heating to hold a during heating test tube rack to hold

8. Ch.1 Introducing Science Bunsen burner Bunsen burner Bunsen burner was invented （發明） by Michael Faraday and improved （改良） by Robert Bunsen. Bunsen burner was invented （發明） by Michael Faraday and improved （改良） by Robert Bunsen. It is used for heating things in the laboratory. It is used for heating things in the laboratory.

9. Ch.1 Introducing Science air hole chimney collar rubber tubing base Basic structure of a Bunsen burner Basic structure of a Bunsen burner

10. Ch.1 Introducing Science The correct steps of lighting a Bunsen burner is as follows: The correct steps of lighting a Bunsen burner is as follows: –Connect the burner to the gas tap. –Close the air hole of the burner. –Light a match and put it just above the chimney of the burner. –Turn on the gas tap. –Open the air hole. Before lighting up the Bunsen burner, we should put a bench mat under the burner.

11. Ch.1 Introducing Science Blue flame is hotter, noisier and has a regular shape. Blue flame is hotter, noisier and has a regular shape. The inner cone of a blue flame contains unburnt gas. That is why it is not very hot. Yellow flame is less hot, quieter and has an irregular shape. Yellow flame is less hot, quieter and has an irregular shape.

12. Ch.1 Introducing Science Measuring Temperature Measuring Temperature The temperature of an object tells us how cold and hot it is. The temperature of an object tells us how cold and hot it is. The most common temperature scales are Celsius 攝氏 ( o C) and Fahrenheit 華氏 ( o F) The most common temperature scales are Celsius 攝氏 ( o C) and Fahrenheit 華氏 ( o F) Temperature can be measured by using thermometers. Temperature can be measured by using thermometers.

13. Ch.1 Introducing Science vacuum Mercury or coloured alcohol

14. Ch.1 Introducing Science