What has to happen for a star to start its life ? 1) Needs enough gravity

2) Needs to suck in everything from the interstellar cloud

3) Needs nuclear fusion to start

4) Needs to exit the T. Tauri phase

In a system, when potential energy decreases, then entropy also decreases. true false

In a series circuit the __ is the same at every point

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.