Ch. 13 Essay Questions & Chapter Review

question

A piece of paper is folded into a paper airplane. How does the mass of the unfolded paper compare with the mass of the paper airplane? Explain
answer

They are the same. The mass of an object does not depend on the object’s shape. A piece of paper has the same mass no matter how it’s shaped. [ex, flat, airplane, fancy boat, etc]
question

The density of water is 1g/cm3. The density of oak wood is .68 g/cm3. Will the oak wood sink or float in water? Explain?
answer

The oak wood would float b/c it’s density is less than the waters density.
question

The statue of Liberty is made of copper metal. Over years of being exposed to air, the surface changes from a shiny copper to a green patina. Is this a physical or chemical change? Explain.
answer

Chemical change. Air [oxygen], combines with copper metal and oxidizes creating/causing a chemical change [making green, no longer shiny].
question

Matter can be found in any of the 4 states. >Identify the four states of matter. >Compare the shape and volume of substances in each state. >Describe the arrangement motion of particles in each state of matter.
answer

>Solid-Definite shape/volume.Particles are very close together, don’t move very fast. >Liquid-No definite shape/definite volume.Move fast enough to move past each other. Slide past each other. Gas-No definite shape or volume. Move in many different directions. Move fast. Plasma-No definite shape or volume.Electric charges, conduct electricity.
question

During a _____, a substance mixes with another substance and changes into completely new substances with different properties
answer

chemical change
question

The measure of the mass per unit volume of a substance is its _____
answer

Density
question

A ____ tells how a substance forms new substances when it mixes with something else.
answer

chemical property
question

The change of state from a gas to a liquid is called ______
answer

condensation
question

An object’s _______ is the amount of space that it takes up.
answer

…Mass
question

A _____ can be seen or measured without changing the substance into something else.
answer

physical property
question

An object’s ______ is the amount of matter that makes up that object.
answer

…volume
question

During a _____, the appearance of a substance changes but its properties stay the same.
answer

physical change
question

The measure of the pull of gravity on an object is its ______
answer

…weight
question

How does plasma differ from gases?
answer

… Plasma can conduct electricity but gases can not
question

For each change below, decide if it is a physical change or a chemical change. Then tell how you know. Chopping wood chocolate melting a candle burning a nail rusting
answer

a.physical. b.physical c.chemical d.chemical a&b, properties stay the same c&d, properties change and new substances w/diff properties form
question

When it goes through a chemical change, a substance changes:
answer

into another substance
question

All of the following are physical properties of a substance EXCEPT: its form at a given temp its density its boiling point its flammability
answer

flammability
question

Chemical properties describe how a substance changes when it: reacts w/another substance changes into a different state changes into a different state of matter adds or loses mass gains or loses energy
answer

reacts with another substance
question

Even if you change the mass of a substance, the substance will always have the same: weight volume pull from gravity density
answer

… density
question

Density
answer

a measure of the amount of matter in a given space
question

Weight
answer

a measure of the pull of gravity on an object
question

Chemical Properties
answer

properties that tell how a substance form new substances when it mixes with something else
question

Volume
answer

the amount of space that something takes up
question

Physical Properties
answer

properties that can be seen or measured without changing the substance into something else
question

Mass
answer

the amount of matter that makes up an object
question

A substance whose matter is more tightly packed than another substance has a greater _____
answer

density
question

The shape of an object is an example of the object’s _____ properties
answer

physical
question

What has a greater mass, 1 liter of water or 1 liter of gasoline? The density of gasoline is approximately 0.68g/ml
answer

The density of water has a greater mass
question

What will sink/float when put in sea water which has density of 1.025 g/ml a.Gasoline .66 g/ml b.mercury 13.6 g/ml c.asphalt 1.2 g/ml d.cork 0.26 g/ml
answer

a.float b.sink c.sink d.float

Get instant access to
all materials

Become a Member