A train travels a 400-km route and makes five stops in seven hours. Which equation is used to calculate the train’s average speed? A.
Average speed = Sum of instantaneous speeds

B.
Average speed = Total distance x Total time

C.
Average speed = Total distance + Total time

D.
Average speed = Total distance ÷ Total time

4. now look at the green lines you created by connecting the three boiling point data points and the three melting point data points. for each of these lines, describe any trends you see. 5. locate the elements on your periodic table that you circled in green on your graph. what term or description would you use to identify these elements with respect to the periodic table? 7. using the room temperature line (orange line) and your periodic table, make lists that identify the state of matter (gas, liquid, or solid) in which each element you plotted exists at room temperature. explain your answers.

Identify some abiotic characteristics of the tundra biome.

Which is an advantage of subdividing science into different areas?