Intro to Physical Science

Daniel and Sanya are scientists. Daniel is studying whether the increasing frequency of tropical storms is affecting coastal erosion. Sanya is investigating whether the discharge from industrial plants has any impact on the pH concentration of freshwater swamps in the surrounding area. Which fields of science are Daniel’s and Sanya’s studies most closely related to?

Daniel's field of study is ___ while Sanya's field of study is ___.

• biological; earth and science

• earth and science; chemistry

• physical; chemistry

• biological; physics

Scientific theories are always

• true

• unreliable

• testable

Scientific theories are always

• competing theories

• new observations

• untested hypotheses

The melting point of ice is 0°C.

• Fact

• law

• theory

• hypothesis

Repeated observations have consistently shown that oppositely charged objects attract each other.

• Fact

• Law

• Theory

• Hypothesis

When the elements carbon and nitrogen are mixed at 1500°C, they will react with each other.

• Fact

• Law

• Theory

• Hypothesis

Atoms are made of protons, neutrons, and electrons. Although we can’t directly see these particles, this structure explains many experimental observations.

• Fact

• Law

• Theory

• Hypothesis

What is the last step to the scientific method?

• Conclusion

• Bias

• Hypothesis

• Communicate Results

Which statement about the relationship between laws, hypotheses, and theories is true?

• Laws that remain true over an extended period of time are considered theories.

• A theory that holds true for a long time is considered a law.

• If a law is not contradicted after a lot of testing, it may be considered a hypothesis.

• If a hypothesis is not contradicted after a lot of testing, it may be considered a law.

Which sentence is a scientific statement?

• Food cooked in ceramic pots has a better aroma than food cooked in copper pots.

• A tall glass of water tastes better with a lemon wedge and ice cubes.

• Today, there are more viewers watching baseball than ice hockey on television.

• There is life on some other planet in the universe aside from Earth.