Two groups of students are doing controlled experiments with electromagnets. They each start with an electromagnet that has 30 winds on the core, one D-cell, and a switch. All of the equipment that the groups are using is the same. Group 1 decides to improve the electromagnet design by changing the number of D-cells in the circuit. They will test 2 D-cells to see if performance is improved. Group 2 decides to improve the electromagnet design by adding 20 more winds and doubling the thickness of the wire used. 5. Which group has a better experimental design? Why do you think so?

What causes the formation of ocean currents?

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.

What would people living along the coast in south florida do if there was a hurricane warning? move to locations away from the water flock along coasts to watch the natural phenomenon buy instruments to predict the exact location of the hurricane measure water levels to know the exact time of the hurricane