Answer:
Observing and counting bird populations
Explanation:
Answer:
Chemical energy, Energy stored in the bonds of chemical compounds. Chemical energy may be released during a chemical reaction, often in the form of heat; such reactions are called exothermic. Reactions that require an input of heat to proceed may store some of that energy as chemical energy in newly formed bonds.
Frogs have webbed feet so they can swim faster and more effectively. The muscles <span>in their back legs are strong.</span>
A blue line indicates that there is water running through the valley. If there is not a blue line the V pattern indicates which way water flows.
