good morning :) please help For which of these questions could a testable hypothesis be developed? Do children’s heart rates increase at the same speed when walking uphill? Is experimenting with moldy bread more fun than experimenting with yogurt cultures? Does temperature affect how long blood can be stored? How does moisture affect the growth of moss on a tree? Which of Leeuwenhoek’s microscopes was the coolest?

Most of them seem like opinions and questions. although I’m not certain I would confidently go with “Experimenting with moldy bread more fun than experimenting with yogurt cultures?”

The scientific method is a series of steps followed by scientific investigators to answer specific questions about the natural world. it involves making observations, formulating a hypothesis, and conducting scientific experiments.the steps of the scientific method are •observation-the first step of the scientific method involves making an observation about something that interests you•question-once you've made your observation, you must formulate a question about what you have observed. •hypothesis-once you've made your observation, you must formulate a question about what you have observed. •experiment-once you've developed a hypothesis, you must design and conduct an experiment that will test it.•results-the results are where you report what happened in the experiment. •conclusion-the final step of the scientific method is developing a conclusion.i hope that this you : )

It is evolution, because we all have some of the same traits like eye color or shape or ears.