Exam 2: Science, Matter, Energy, and Systems

-After looking at the figure above, explain the significant difference that occurred between 1966 and 1970 in terms of the two lines representing the control watershed and the experimental watershed.

In an experiment, which of the following would not change the chosen variable?

If a macromolecule was a brick wall it would be called a(n) ____________________ made up of repeating units called ____________________.

The most basic building block of matter is a(n)

Which of the following is supported by data, hypotheses, models, theories, and laws that are widely accepted by scientists considered experts in the field under study?

Methane, a hydrocarbon, is considered an organic molecule even though it contains only one carbon atom.

Which one of the following does not illustrate a time delay?

The monomer for the protein polymer is the

According to the law of conservation of matter, once trash decomposes in a landfill we have completely gotten rid of the matter which made up the trash.

Which of the following is not a key component of a system?

Scientists use the statistical concept of probability to evaluate the results of experimentation.

The mass number is equal to the sum of the

Which of the following is not an example of an environmental threshold having been crossed?

Science has limitations, including all of the following, except

____________________ happens when scientists report details of their research and other scientists evaluate it.

Two or more processes interacting such that the combined effect is greater than the sum of the individual effects is called

Which of the following is not one of the nuclear changes matter can undergo?

Which of the following statements is not an example of a physical change?

Scientists can disprove things but they cannot prove anything absolutely, which means there is always some uncertainty in science.

Energy cannot be recycled.