Transcript ppt
Twenty Questions 20 Questions 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Question 1 • What is the International System of Units? The Answer is… The International System of Units is … • A system of measurement based on the number 10 Question 2 • Why do scientists use the International System of Units? The SI Answer is… Scientist use the International System of Units because it….. • makes sharing results among scientists easier. • contains units that are based on the number 10. • standardizes a method of recording observations. Question 3 • A bacteria can be seen with ……. The Answer is… • A compound light microscope is used to see bacteria. Question 4 • To measure the volume of a liquid, you would use a…… The Answer is… • A graduated cylinder would be used to measure the volume of a liquid Question 5 • To measure the mass of a solid, you would use a…… The Answer is… • A balance would be used to measure the mass of a solid. Question 6 • To measure the length of an object, you would use a…… The Answer is… • A ruler would be used to measure the length of an object. Question 7 • To measure temperature, you would use a…… The Answer is… • A thermometer would be used to measure temperature. Question 8 • When a scientist finds that a hypothesis is wrong, what should a scientist do? The Answer is… When a scientist finds that a hypothesis is wrong, a scientist should….. • try to find another explanation for what has been observed. Question 9 • After concluding that your tests support your hypothesis, you should….. The Answer is… After concluding that your tests support your hypothesis, you should….. • publish the results so that other scientists can learn from you. Question 10 • Scientists try to design experiments that will clearly show whether a particular ____ was the cause of an outcome. The Answer is… • Scientists try to design experiments that will clearly show whether a particular variable was the cause of an outcome. Question 11 • In order to be certain about the conclusions of an experiment, scientists should ….. The Answer is… • In order to be certain about the conclusions of an experiment, scientists should …… repeat the same experiment many times. Question 12 • A scientist wants to study the possible side effects of a new medicine, how should he/she set up this experiment? (how many groups? how much medicine? control group?) The Answer is… • The scientist should include a control group that receives no medicine, so that the scientist will know whether or not the medicine had a side effect as compared to the control group which did not receive the medicine. Question 13 • When researchers use the scientific method, can they repeat or switch the order of steps or do they need to keep them always exactly the same? The Answer is… Researchers using the scientific method can….. • repeat or switch the order of steps as needed. Question 14 • In a scientific experiment, a hypothesis that cannot be tested is always considered to be …… The Answer is… In a scientific experiment, a hypothesis that cannot be tested is always considered to be ……. • not useful. Question 15 • After forming a hypothesis, you should ….. The Answer is… After forming a hypothesis, you should ….. • test your hypothesis. Question 16 • In what kinds of ways can you analyze results? The Answer is… You can analyze your results by … • organizing your data into tables and graphs. • doing calculations to learn more about your results. Question 17 • After concluding that your tests support your hypothesis, you should ….. The Answer is… After concluding that your tests support your hypothesis, you should…… • publish the results so that other scientists can learn from you. Question 18 • What do scientists use to answer a question or solve a problem? The Answer is… Scientists use • the scientific method. • their imagination. • their creativity. to answer a question or solve a problem. Question 19 • When scientists find that a hypothesis is not supported by the tests they perform, they realize that …. The Answer is… If scientists find that a hypothesis is not supported by the tests they perform, then they realize that • they have eliminated one possible factor. Question 20 • If a tested hypothesis does not produce the expected results, ….. The Answer is… If a tested hypothesis does not produce the expected results, then….. • don't trash the results—it might lead to another discovery.