Quarter 2 Exam Practice

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

A pH of 5 or lower classifies rainwater as acid rain.

Front

How does temperature affect the brightness and duration of glow sticks?

Back

The glow stick placed in boiling water will be brightest but will last less time than the others.

Front

What can you predict from an element’s location in the Periodic Table?

Back

You can predict its physical properties.

Front

How does increasing temperature affect the rate of a chemical reaction?

Back

Faster moving particles come in contact more often, increasing the chances for a reaction.

Front

What is a hypothesis in scientific observation?

Back

A hypothesis is a proposed explanation based on observations that can be tested.

Front

What is the importance of using control samples in an experiment?

Back

Control samples help to compare results and validate the hypothesis.

Front

What is the role of particles in a chemical reaction?

Back

Particles must collide with sufficient energy for a reaction to occur.

Front

What is the significance of the Periodic Table in chemistry?

Back

The Periodic Table organizes elements based on their properties and helps predict their behavior.

Front

What is acid rain and its effects?

Back

Acid rain is rainwater with a pH lower than 5.5, which can harm ecosystems and structures.