Grade level: 5, 6, 7, 8, 9, e, i, s.Before we answer those questions, leta#39;s back up a bit and discuss a few basics. First, ita#39;s relatively easy to ... Two magnets that have been pulled apart have energy (watch them snap back together when you let go). ... Of course, ita#39;s practically impossible to cre- ate a truly closed system, but the concept is useful. If we wereanbsp;...
|Title||:||Answers to Science Questions from the Stop Faking It! Guy|
|Author||:||William C. Robertson|
|Publisher||:||NSTA Press - 2009|