Science Skills I Final Prep

Front

What happens when an atom loses an electron?

Back

It becomes a positive ion.

Front

What is a base?

Back

A base is a substance that releases OH- ions when dissolved in water.

Front

What is the pH of a base?

Back

A substance with a pH greater than 7 is considered a base.

Front

How many chromosomes do human cells have?

Back

Human cells have 46 chromosomes.

Front

What class of macromolecules does sugar belong to?

Back

Sugar belongs to carbohydrates.

Front

What is an ion?

Back

An ion is an atom or molecule that has a net electric charge due to the loss or gain of one or more electrons.

Front

What is the difference between an acid and a base?

Back

Acids release H+ ions in solution, while bases release OH- ions.

Front

What is the pH scale?

Back

The pH scale measures how acidic or basic a substance is, ranging from 0 (acidic) to 14 (basic), with 7 being neutral.

Front

What is a neutral atom?

Back

A neutral atom has an equal number of protons and electrons, resulting in no overall charge.

Front

What are macromolecules?

Back

Macromolecules are large, complex molecules that are essential to biological processes, including carbohydrates, proteins, lipids, and nucleic acids.