8th Grade Science Semester 1

Front

What is a base?

Back

A base is a substance that can accept hydrogen ions (H+) or donate electron pairs in reactions. Bases have a pH greater than 7.

Front

What is the pH scale?

Back

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

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation, indicating that mass is conserved.

Tags

NGSS.MS-PS1-5

Front

What is an experiment?

Back

An experiment is a scientific procedure undertaken to test a hypothesis, where all conditions are controlled to ensure valid results.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS2-2

Front

Why is eye protection important in the laboratory?

Back

Eye protection is important to prevent injuries from chemicals, heat, or glassware that can cause serious harm to the eyes.

Front

What are safety rules in a science classroom?

Back

Safety rules include no horseplay, wearing appropriate safety gear, and following instructions carefully to prevent accidents.

Front

What is the scientific method?

Back

The scientific method is a systematic process for investigating phenomena, acquiring new knowledge, or correcting and integrating previous knowledge.

Tags

NGSS.MS-PS1-2

Front

What is the role of a control in an experiment?

Back

A control is a standard for comparison in an experiment, allowing scientists to determine the effect of the variable being tested.

Front

What does it mean for a substance to be neutral?

Back

A neutral substance has a pH of 7, meaning it is neither acidic nor basic.

Front

What is the difference between an acid and a base?

Back

Acids donate hydrogen ions (H+) in solution, while bases accept hydrogen ions or donate hydroxide ions (OH-).