4) While exploring the seafloor, you find that 100-million-year-old seafloor is 2000 kilometers
away from the ridge where it formed.
a) How fast is the plate moving away from the ridge in units of centimeters per year (cm/year)

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

Write down two additional questions about earth's magnetic field that will make your presentation more informative.

Click the game tab at the bottom of the simulation and select level 1. (there is no seesaw balance for this part of the activity.) balance the first equation, and click check to see if you got it right. if you can’t balance it in the first try, you can try again. work through the five equations for level 1. click continue to go on to level 2, and later level 3. each level is more difficult than the one before. keep trying until all the equations are balanced. in one or two sentences, describe how you did in the balancing game. in a few more sentences, explain one strategy you learned for balancing more complex equations.