7th Chapter 2 Study Guide

The rusting of iron is not a physical property because ___.

• iron is magnetic

• the identity of iron remains unchanged

• a new substance with new properties formed

• it cannot be observed

Which process can be used to find the volume of an irregular-shaped solid?

• malleability

• displacement

• buoyancy

• solubility

An example of a chemical property is ____.

• boiling point

• ability to be attracted by a magnet

• solubility

• ability to react with oxygen

The following are examples of chemical properties EXCEPT

• the ability to burn

• the ability to be crushed

• toxicity

• the ability to react with oxygen

Which of the following is an example of a chemical reaction?

• dissolving salt into water

• freezing water

• lighting a match

• breaking a glass

Which state of matter has a very weak attractive force between particles?

• gas

• liquid

• clay

• solid

Which method of separation can be used to separate a solution of water and salt?

• separation by boiling point

• separation by magnetism

• separation by state of matter

• manual separation

Which formula listed below correctly finds density?

• D= V/m

• D= g/V³

• D = m/V

• D = g³/V

In an experiment, a student adds baking soda to vinegar and observes that a large amount of gaseous carbon dioxide is released. What is the scientific reason for this change?

• Baking soda chemically changes when added vinegar

• Baking soda evaporates when added vinegar

• Baking soda's atoms are destroyed when added vinegar

• Baking soda condenses when added to vinegar

What happens to an iron nail when it rusts?

• Iron reacts with oxygen in the air, creating iron oxide

• The nail becomes lighter because rust heats the iron

• The nail becomes heavier because rust weighs more than iron

• Oxygen in the air dissolves part of the iron