2024 Physical Science Midterm Exam Review

Front

What is a dependent variable?

Back

The dependent variable is the outcome or response that is measured in an experiment, which changes in response to the independent variable.

Tags

NGSS.MS-LS1-5

NGSS.MS-PS1-2

Front

What is the process called when a solid changes directly into a gas?

Back

Sublimation is the process where a solid changes directly into a gas without passing through the liquid state.

Tags

NGSS.MS-PS1-4

Front

What are metalloids?

Back

Metalloids are elements that have properties of both metals and nonmetals, and they are found along the staircase line on the periodic table.

Front

What is the significance of the periodic table's periods and groups?

Back

Periods are horizontal rows that indicate the number of electron shells, while groups are vertical columns that indicate elements with similar chemical properties.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is a substance formed when two or more different elements are chemically bonded together.

Front

What is the formula for calculating speed?

Back

Speed = Distance / Time.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; it is conserved.

Tags

NGSS.MS-PS1-5

Front

What is an independent variable?

Back

The independent variable is the factor that is changed or manipulated in an experiment to observe its effect on the dependent variable.

Front

What is the difference between physical and chemical changes?

Back

Physical changes affect the form of a substance but not its chemical composition, while chemical changes result in the formation of new substances.

Tags

NGSS.MS-PS1-2

Front

What is the pH scale?

Back

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