Henry is interested in studying the different techniques perching birds use to build their nests. what type of investigation would best henry learn more about this topic? a. perform a controlled experiment b. make observations in nature c. discover a previously unknown perching bird species d. build a model of a nest

Hello Peppa Pig,

I'd say that the answer is B because you can observe how the perching birds make their nests.

Have a good day

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.