3. Independent variable is the variable people who do the experiments have control over, what people can choose and manipulate. (Frank Cody, http://www.ncsu.edu/labwrite/po/independentvar.htm)It is a variable whose values are independent of changes in the value of the experiment and it is depend on the person who do the experiment. So it is usually what I think will affect the dependent variable.
Dependent variable is depend on the independent variables. (Frank Cody, http://www.ncsu.edu/labwrite/po/dependentvar.htm) It is the result of the experiment and it has a certain relation with independent variables and it will change as the independent variable changes.
Hypothesis is an idea or explanation of something that is bases on a few known facts but that has not yet been proved to be true to correct. In an experiment, it is the result that you image that will be. (David Bert, http://www.merriam-webster.com/hypothesis)
4. 1. At first, I need to use the data from the table to choose an appropriate scale. And all scales start at 0(Carolyn Barratt, http://www.wikihow.com/Make-a-Line-Graph) 2. Then I will draw and label the scale on the vertical axis 3. Draw and label the horizontal axis 4. After finish draw and label the axis, I need to list the name of each item 5. Then use the data to locate the points on the graph 6. Connect the points with line segments 7. The last thing is to writhe the title of the line graph 5. This is compressed gas symbol. (Charmain Barker, pA compressed gas is a substance that is a gas at normal room temperature and pressure, and is contained under pressure, usually in a cylinder. Some compressed gas are dangerous and may explosion if we don’t place it in a properly environment. (Susi, http://susi10.hubpages.com/hub/Laboratory-Signs-and-Symbols-and-Their-Meanings)
This is Flammable Material symbol. Flammable Materials are materials that is easy to burn. (Susi,