8th Grade Science Semester 1

Front

What is an acid?

Back

An acid is a substance that donates protons (H+) in a solution, typically having a pH less than 7. Example: Tomato Soup has a pH of 4.

Front

What is a base?

Back

A base is a substance that accepts protons or donates hydroxide ions (OH-) in a solution, typically having a pH greater than 7. Example: Soap has a pH of 10.

Front

What is pH?

Back

pH is a scale used to measure the acidity or basicity of a solution, ranging from 0 (very acidic) to 14 (very basic), with 7 being neutral.

Front

What is an experiment?

Back

An experiment is a scientific investigation where all conditions are controlled to test a hypothesis.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS2-2

Front

What is the scientific method?

Back

The scientific method is a systematic process for conducting research, including observation, hypothesis formulation, experimentation, and conclusion.

Tags

NGSS.MS-PS2-2

Front

What safety equipment should be worn in a laboratory?

Back

Approved eye protection devices, such as goggles, should be worn any time chemicals, heat, or glassware are used.

Front

What should you do if a fire erupts in the lab?

Back

Immediately notify the teacher.

Front

What is the strongest base among the following: soap (pH 10), HCl (pH 0), blood (pH 7.45), soft drink (pH 3)?

Back

Soap (pH 10) is the strongest base.

Front

What is the role of a control in an experiment?

Back

A control is a standard for comparison in an experiment, ensuring that the results are due to the variable being tested.

Front

What is a hypothesis?

Back

A hypothesis is a testable prediction about the relationship between two or more variables.