The chemical reaction involved in burning wood is that endothermic or exothermic?

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?

3. on your graph, the data points between the black squares are data for elements with atomic numbers 3 through 9. locate these elements on your periodic table. what term or description would you use to identify these elements with respect to the periodic table?

If forces acting on an object are unbalanced. true or false