Chapter One Science Test Notes

1. Chapter One Science Test Notes 8th Grade

2. At the end of an investigation if your results do not support your hypothesis; change the hypothesis, change the procedure, gather more information, or ask new questions. • A good way to analyze data is to organize it into charts and graphs, and do calculations if necessary.

3. A hypothesis must be testable. • In a controlled experiment, the one factor that changes between groups is called a variable parameter. • Scientific methods are the steps scientists use to answer questions and solve problems.

4. Developing methods to recycle steel from old cars is an example of how science can save resources. • Answering some questions by looking up facts in magazines is an example of research.

5. The knowledge obtained by investigating the natural world is called science. • If you look up information on the Internet, you are using research. • The most common cause of accidents in the laboratory is not reading and following directions.

6. If you see the symbol for heating safety, you should clear flammable things off your work area. • Science helps save lives by designing car air bags. • Science is knowledge gained by investigating the natural world.

7. When an accident happens during science lab, you should always tell your teacher. • Emergency medical care or someone who has been hurt or who is sick is called first aid. • Some methods for communicating the results of scientific investigations is writing a scientific paper, making a presentation, and publishing the results on a website.

8. Finding answers to a scientific question on a television program is a form of research. • The next thing a scientist must do after forming a hypothesis is to test it with experiments.

9. After an accident in lab, you should make sure you are safe and tell your teacher. • Science saves lives by meteorologists learning to predict tornadoes. • Analyzing and organizing data can help a scientist evaluate the data’s accuracy and reproducibility.

10. A good way to tell how accurate and reproducible your data is would be to analyze data from repeated tests. • Communicating results is an important step for scientists.

11. Early scientists thought the shapes of birds’ wings helped birds fly. In their first experiments, they made wings the same thickness and shape from front to back. This didn’t work. After analyzing the results, they should have designed new wing shapes.

12. At the end of an experiment, after analyzing your results, you must draw a conclusion. • A statement in an if-then format is called a prediction.

13. The first step of a scientific investigation is asking a question. • A scientist invents a way to protect the ozone layer. This is an example of how science helps answer how can the environment be protected. • Asking a scientist about the changes in the moon over a month is an example of research.

14. The one factor that changes between groups in a controlled experiment is called a variable parameter. • By inventing ways to recycle materials, scientists have helped make resources last longer.

15. The process of comparing results from a control group to results from other groups is called a controlled experiment. • A propulsion system that works the way a penguin swims will be more efficient that a boat powered by propellers is an example of a hypothesis.

16. I don’t get it. Is that a joke? Geez! It’s cold here. Have a Nice Day!