Tools and Technology Answers

Jorge is testing the effect of lead on child development. Based on his observations, he finds that the longer the children are exposed to lead-based paint, the higher the chance becomes that the children may develop behavioral problems. He has done repeated experiments, and his results are similar to the results of many other scientists.Why is this scenario considered a theory rather than a hypothesis?

Which hypothesis will most likely lead to further investigation and, potentially, a theory?

Scientists initially believed that the smallest particle of matter was the atom. Then, particles smaller than the atom were discovered.What most likely contributed to the change in this theory?

Which statement identifies a characteristic of a scientific theory?

Which phrase describes a characteristic of a scientific law?

Ana is planning to build an electrical circuit. Before building it, she writes the statement, "If four batteries are connected to a light bulb, then the light bulb will burn longer than if two batteries are connected because more batteries provide more energy."Which best explains why Ana's statement is a hypothesis rather than a theory?

How is a theory different from a law?

Kiara has a red bird feeder, and her neighbor has a blue bird feeder. Kiara observed that most birds go to her neighbor's blue feeder instead of her red one. She wanted to know why this happens, so she developed the following hypothesis:"If my bird feeder is blue, then the amount of birds feeding at my feeder will increase because birds prefer the color blue."To test this hypothesis, she bought a blue bird feeder. The results were the same as before she had changed the color of her bird feeder.What does this say about Kiara’s hypothesis, and what should she do next?

Which option supports a theory and allows it to remain the same?