8th Grade 1st Semester Review

Front

What is the definition of constant velocity?

Back

Constant velocity means an object is moving at the same speed and in the same direction without changing.

Front

What does the Hertzsprung-Russell Diagram represent?

Back

The Hertzsprung-Russell Diagram is a scatter plot of stars showing the relationship between their absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.

Front

What is a precipitate in chemistry?

Back

A precipitate is a solid that forms when two liquids are mixed and a chemical reaction occurs.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is an example of a physical change?

Back

Water evaporating is an example of a physical change because it does not change the chemical composition of water.

Tags

NGSS.MS-PS1-4

Front

What is the function of the mitochondrion in a cell?

Back

The mitochondrion converts the chemical energy stored in food molecules into usable energy for the cell.

Tags

NGSS.MS-LS1-2

Front

What is the difference between a chemical change and a physical change?

Back

A chemical change results in the formation of new substances, while a physical change does not alter the chemical composition of a substance.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What happens during iron rusting?

Back

Iron rusting is a chemical change where iron reacts with oxygen and moisture to form iron oxide, commonly known as rust.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is the formula for calculating acceleration?

Back

Acceleration = (Final Velocity - Initial Velocity) / Time.

Front

What is an example of a chemical change?

Back

Wood burning is an example of a chemical change because it produces new substances like ash and smoke.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is the role of the cell membrane?

Back

The cell membrane controls what enters and exits the cell, providing protection and structure.

Tags

NGSS.MS-LS1-2