Q2 ULTIMATE EXAM REVIEW- 8th GRADE 24-25

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances, often accompanied by energy changes, color changes, or the production of gas.

Front

What is an example of a chemical change?

Back

The wick burning in a candle is an example of a chemical change.

Front

What are the rows in the periodic table called?

Back

The rows in the periodic table are called periods.

Front

What are the columns in the periodic table called?

Back

The columns in the periodic table are called groups.

Front

What is produced in a neutralization reaction along with water?

Back

A salt is produced in a neutralization reaction along with water.

Front

What part of the atomic model contains almost all of the mass?

Back

The nucleus contains almost all of the mass of an atom.

Front

What is the pH range of normal rainwater?

Back

Normal rainwater has a pH between 5.5 and 6.

Front

What pH value classifies rainwater as acid rain?

Back

Rainwater with a pH of 5 or lower is classified as acid rain.

Front

What is the definition of an acid?

Back

An acid is a substance that donates protons (H+) in a chemical reaction and has a pH less than 7.

Front

What is the definition of a base?

Back

A base is a substance that accepts protons (H+) in a chemical reaction and has a pH greater than 7.