True/False. Decide if each statement is true or false, and write true or false in the blank
6. The hydrosphere is the air that surrounds the earth.
7. The mantle is the layer of iron-rich minerals
surrounding the earth's core.
8. The asthenosphere is the innermost layer of
the earth.
9. The lithosphere is the outermost layer of the mantle,
including the earth's crust.
10. The crust is the outermost layer or surface of
the earth.

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.