PMA 2 Review (Comp Science 2)

It is well-tested and explains a wide range of observations on why the natural world works.

It can be proven conclusively, because it is how the natural world works.

It can never change, because it is how the natural world works.

It can never change, because it is why we think the natural world works.

A theory is a well-tested explanation of why the natural world works and a law is a concrete physical representation (model).

A theory is a well-tested description of how the natural world works and a law is a well-tested explanation of why the natural world work.

A theory is a well-tested explanation of why the natural world works and a law is a well-tested description of what happens in the natural world.

A theory is a hypothesis that is yet to be proven false and a law is a hypothesis that will always be true.

Theories more than ten years old are usually out of date.

New evidence that supports a change causes scientists to change earlier theories.

Scientists want to prove that the work of other scientists is wrong.

So much information is available today that it is harder to focus research and disprove theories.

Mai’s idea is already a scientific law.

Mai’s idea is a good guess that can be tested by experiments.

Mai and her uncle are not scientists.

Mai’s idea is not supported by scientific evidence.

water

energy

wind

particles

transparent

opaque

translucent

solid

opaque

transparent

translucent

echo

transverse, air

transverse, matter

longitudinal, liquids

longitudinal, matter

True

False

The material through which a wave travels.

The distance from one wave crest to the next.

A point half way between the crest and trough.

The speed at which waves travel in water.