8th grade Science STAAR Review

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include changes in size, shape, or state of matter.

Front

What process in the digestive system is classified as a physical change?

Back

Teeth grinding an almond into smaller pieces in the mouth.

Front

What is the location on Earth that experiences the least change in the number of daylight hours throughout the year?

Back

The Equator.

Front

What is an electron?

Back

An electron is a subatomic particle that has a negative charge and much less mass than a proton.

Tags

NGSS.MS-PS1-5

Front

What is the SI unit for force?

Back

Newton.

Front

What phase comes after Waning Crescent?

Back

Waning Gibbous.

Tags

NGSS.MS-ESS1-1

Front

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

Back

A physical change alters the form or appearance of a substance without changing its identity, while a chemical change results in the formation of new substances.

Tags

NGSS.MS-PS1-2

Front

What is the role of saliva in digestion?

Back

Saliva contains enzymes that begin the process of breaking down starches into simple sugars.

Tags

NGSS.MS-LS1-7

Front

What is the significance of the Equator in terms of daylight hours?

Back

The Equator experiences relatively consistent daylight hours throughout the year due to its position relative to the sun.

Front

What is the charge of a proton?

Back

A proton has a positive charge.