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lung tissuecigarette use✔ lung function
For which of these questions could a testable hypothesis be developed? Check all that apply.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?
Which statements describe a good hypothesis? Check all that apply.A good hypothesis does not always have to be based on prior knowledge or research.A good hypothesis is valuable even if it turns out to be incorrect.A good hypothesis provides a possible explanation to answer a scientific question.A good hypothesis is based on one’s personal opinion.A good hypothesis can be tested.A good hypothesis leads to a test with measureable results.
Identify the variables in this hypothesis.
Identify the variables in this hypothesis.
Fatima is watching her pet cat, Winter, napping in the sun. Fatima is curious about the heart rate of Winter when she is napping, so she develops this scientific question: Does a cat’s heart rate change while it is napping?She decides to develop a hypothesis to test this scientific question. What could Fatima’s hypothesis be?
If a cat is napping, then its heart rate will be slower than when it is awake and active because the body requires less oxygen and energy while resting.
What happens when several experiments with new information or new technology produce results that challenge an existing theory?
Sample Response: If a cat is napping, its heart rate will be slower than when it is playing because its heart will not need to pump as much blood to its muscles. What did you include in your response? Check all that apply.If the cat is playing, then its heart rate and breathing are fast.A napping cat is not moving, so its heart rate is slower than if it were running around.Fatima can test the cat’s heart rate while napping and while playing, and compare the two.
Sample Response: Theories may be changed over time as new information is discovered or new technologies are developed. New developments lead to changes in experimental methods, which provide information that may or may not support the existing theory. If the theory is still supported, it may be updated. If it is not supported but the results are true and relevant, the theory may be replaced. What did you include in your response? Check all that apply.New information and technology may be develop
Sample Response: Theories are not accepted as fact because new information or technology can show that the theory is incomplete or incorrect. A law is accepted as fact because no exceptions have ever been found. What did you include in your response? Check all that apply.A theory may be incomplete or incorrect.A theory may change due to new knowledge provided by new information or technology.A law is a factual statement.No exceptions to laws have been found.
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