Laws differ from theories because laws do not provide (1 point) a hypothesis. a description. an explanation. a statement. 2. Which of the following statements about line graphs is true? (1 point) The dependent variable is on the horizontal axis. Line graphs are always straight lines. Every data point should be shown on a line graph. There is a maximum number of data points that can be used in a line graph. 3. Note: The item below has been reviewed and is scheduled to be updated. All students will receive full credit for any response to the following. Which stage of the scientific process enables a scientist to check the work of other scientists? (1 point) classifying concluding hypothesizing communicating 4. What are some reasonable safety precautions for field investigations? (1 point) None; there are no hazards in the field. Always wear goggles and aprons. Be prepared and use common sense. Always go into the field alone. 5. This safety image warns of a risk of a triangle showing a person at an angle with one foot on the ground and one foot in the air (1 point) explosion. poison. slipping. acidity. 6. Two scientists failed to report unusual findings when they shared their results from a recent science experiment. Why is this not scientifically sound? (1 point) Scientists should always report their observations and results truthfully. Scientists are capable of accepting new and different ideas. Scientists often invent ways to solve difficult problems and produce new things. Scientists are eager to learn more about what they study. 7. Which of the following is not a step of the scientific method? (1 point) identifying the problem making observations making a hypothesis making a law 8. What is the goal of technology? (1 point) to understand how the natural world functions to study the natural world to improve the way people live to answer scientific questions 9. Which measurements are needed in order to calculate the density of a given object? (1 point) length and width mass and weight volume and temperature mass and volume 10. Four students measure the length of a paper clip whose actual length is 3.2 cm. Whose measurements are precise but not accurate? (1 point) Samuel: 2.7 cm, 2.7 cm, 2.7 cm, 2.8 cm Jose: 2.2 cm, 2.6 cm, 3.0 cm, 3.3 cm Nikita: 3.1 cm, 3.1 cm, 3.2 cm, 3.2 cm Anne: 2.6 cm, 3.2 cm, 3.2 cm, 3.6 cm 11. How does good preparation help you stay safe when conducting a science experiment? (1 point) It ensures you will get a good grade on your lab report. It ensures you will take the proper precautions when setting up your experiment. It ensures you will get the results you want from your experiment. It ensures your hypothesis is true. 12. What is it called when a scientist's personal opinion affects the way experimental results are reported? (1 point) bias curiousity inductive reasoning deductive reasoning 13. In a flashlight, many parts work together as a system. Which of the following parts is considered the output in this particular system? (1 point) the switch light the light bulb the batteries 14. If you wanted to measure the length of a fence, which of the following SI units of measure would you use? (1 point) the cubic meter the millimeter the meter the kilogram 15. A scientist is measuring how tall plants grow under different conditions. For plants grown in direct sunlight, he collects the following measurements in cm: 22,22,23,24,25,25 What is the mean of this set of measurements? (1 point) 23.5 cm 22 cm 25 cm 22.5 cm 16. A scientist is measuring how tall plants grow under different conditions. For plants grown in direct sunlight, he collects the following measurements in cm: 22,22,23,24,25,25 What is the mean absolute deviation of this set of measurements? (1 point) 23.5 cm 23 cm 1.17 cm 2.17 cm 17. A scientist measures in seconds the amount of time it takes for a solution to completely dissolve. He gathers these measurements from multiple trials: 5,5,5,6,6,7,7 What is the median for this set of measurements? (1 point) 5 s 6 s 7 s 6.5 s 18. A scientist measures in seconds the amount of time it takes for a solution to completely dissolve. He gathers these measurements from multiple trials: 5,5,5,6,6,7,7 What would be the best way for him to report the center of the data? (1 point) by reporting the mode by reporting the median by reporting the mean absolute deviation by reporting the interquartile range