Physical Science Midterm

Front

What does the metric prefix 'centi-' mean?

Back

Centi- means one-hundredth (1/100).

Front

Which element is a member of the Halogen family and is in Period 4?

Back

Bromine.

Front

What is Avogadro’s number?

Back

6.022 x 10^23.

Front

What is a theory in science?

Back

An explanation of why something happens in the natural world.

Front

What is the volume reading of a graduated cylinder that shows 38 ml?

Back

38 ml.

Front

What does the metric prefix 'kilo-' mean?

Back

Kilo- means one thousand (1,000).

Front

What is the definition of a hypothesis?

Back

A hypothesis is a proposed explanation for a phenomenon, which can be tested.

Front

What is the difference between a scientific law and a theory?

Back

A scientific law describes a consistent relationship observed in nature, while a theory explains why that relationship exists.

Front

What is the metric prefix that means one-thousandth (1/1000)?

Back

Milli-.

Front

What is the significance of Avogadro's number in chemistry?

Back

It represents the number of atoms, ions, or molecules in one mole of a substance.