Unit 0: HOW DO SCIENTISTS WORK? 1. The scientific method 2. Laboratory equipment 3. Safety in the laboratory Vocabulary: scientist, research, hypothesis, scientific journal, safety rules, step, scientific method, reliable.

1. SCIENTIFIC METHOD Step 1: Observation After we observe an occurrence we ask ourselves questions based on the observation Step 2: Formulation of hypothesis Suggesting an answer to the question Step 3: Experiment Design and do an experiment that tells you if the hypothesis is correct or not Step 4: Analysis of results When you have finished the experiment and analysed the results, check if the hypothesis was correct or not Step 5: Conclusions When you have checked the hypothesis, you can reach a conclusion. The conclusion often helps researchers to decide what researh or experiment to do next

Activity. Groups of five students. Activity 3 on page 4. Match the words to the definitions in your notebook. a) hypothesis 1) examination if the data from a experiment b) analysis 2) procedure to test a hypothesis c) experiment 3) suggested answer to a scientific question Activity. Groups of five students. Each of them has to memorize one step of the scientifc method. The group has to explain it in class to the rest of their classmates.

2. LABORATORY EQUIPMENT

Optical microscope and its parts

3. SAFETY IN THE LABORATORY Activity. You have to make an outline about rules for the laboratory (page 7). Activities on page 9.