8th Grade Test Review

Students conducted an experiment to determine if unknown liquids were acids or bases. What was the independent variable in this investigation?

• Sample

• Indicator

• Color change

• Identification

Tags

NGSS.MS-PS1-2

Students placed steel wool in beakers of four different liquids in order of the most acidic to neutral. The students recorded their observations in the table. Which is the best conclusion in the table?

• The more acidic the substance, the faster it reacts with wool.

• The more acidic the substance, the faster the steel wool turns to a gas.

• The less acidic the substance, the faster the steel wool becomes covered with air bubbles.

• The less acidic the substance, the faster the steel wool changes color.

Tags

NGSS.MS-PS1-2

Liquids can be described as having

• definite shape and volume

• definite volume but no shape

• no definite shape or volume

• particles in fixed positions

Tags

NGSS.MS-PS1-4

The smallest particle of an element that has the properties of that element is a(n)

• ion

• compound

• atom

• nucleus

Which of the following is a physical property?

• How easily a substance reacts with another substance

• How easily a substance corrodes

• How easily a substance conducts heat

• How easily a substance forms compounds

What does the pH of drain cleaner (ph=14) indicate about the dangers of such a product?

• It is a strong acid

• It is a weak acid

• It is a strong base

• It is a weak base

A substance that tastes sour, reacts with metals and carbonates, and turns blue litmus red is a(n)

• element

• salt

• base

• acid

What does a neutralization reaction produce?

• an acid

• an acid and a base

• water and a salt

• carbonated water

Tags

NGSS.MS-PS1-5

Which of the following is a description of a gas?

• Definite shape and volume

• Definite volume but no shape

• No definite shape or volume

• Particles in fixed positions

Tags

NGSS.MS-PS3-4

The difference between organic and inorganic compounds is

• organic compounds do not contain carbon

• organic compounds contain carbon

• organic compound and inorganic compounds both do not contain carbon

• organic compound and inorganic compounds both contain carbon