Nature of Science Florida

An event, condition, or factor that can be changed or controlled in order to study or test a hypothesis in a scientific experiment is known as a

• Evidence

• Conclusion

• Predict

• Variable

Sarah writes on her lab sheet "I think that placing a plant in a closet away from sunlight will cause the plant not to grow." This statement is an example of a

• Conclusion

• Question

• Prediction

• Data

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Information about the natural world gathered through the senses and/or scientific instruments is known as a

• Observation

• Variable

• Control Group

• Trial

Wildlife biologists are working to save unique birds in Florida's forests. Which of these questions MUST be answered first to determine how the birds can be protected for future generations?

• What kinds of industries are likely to develop in the area?

• How far can the birds migrate?

• How many people live in the area?

• What do the birds need in order to survive and reproduce?

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John performed an experiment. He feels that replicating his results will increase the validity of his results. Which of the following is an example of replication?

• another student copying John's experiment without permission

• John redoing his own experiment to check for validity

• another student redoing John's experiment to check for validity

• John researching another scientist's experiment for similarities

A scientist has a hypothesis involving the genes of two spotted lizard breeds. He believed that small spots are dominant. He also believed that if a lizard with small spots bred with a lizard with large spots, the offspring would have small spots. He designed an experiment to determine whether his hypothesis was correct. After he completes his experiment, which of the following additional steps would have the GREATEST impact on strengthen his ideas?

• He should repeat his experiment at least one more time before sterilizing his equipment.

• He should take lizards to a wildlife sanctuary and release them.

• He should send his results to another scientist to look over.

• He should repeat his experiment; then have someone else replicate his experiment.

What is the term "empirical evidence" used to describe?

• It describes information gained by direct observation of an event.

• It describes cause and effect relationships.

• It describes events that are know by their one-time occurrence.

• It describes ideas based on inferences from observations.

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Spontaneous generation was an idea that living things appear from nonliving things. This was disproved by Louis Pasteur's experiment using bacteria to demonstrate bacteria comes from existing bacteria. What is this an example of?

• A scientific theory

  changes as an organism evolves.

• Changes cannot be made

  because it is a scientific law.

• Scientific knowledge changes as new evidence is discovered by experiments.

• Bacteria have been observed and modified many times.

Why was the model of the atom changed?

• Scientific experiments cannot disprove the current model of the atom.

• The atomic model was modified as new evidence was encountered.

• Scientists still cannot agree on a correct model for an atom.

• Scientists continue to discover new atomic elements but the model of the atom has not changed.

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What is the primary purpose of a control group in a scientific experiment?

• To provide a standard for comparison

• To introduce new variables

• To ensure the experiment is biased

• To manipulate the outcome