Standard 1 Objective 1: Describe the chemical and physical properties of various substances 121of...

Standard 1 Objective 1: Describe the chemical and physical properties of various substances

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The following data were collected by a group of students as they tested four different types of plastics.

Plastic Acetone Flame Test Heat Crease Color

1 No Effect Green Color Softens None

2 Softened No Change No Change White

3 No Effect Red Color Softens None

Which plastic would be unsafe to use to store products that contain acetone?

A. Plastic 1 B. Plastic 2 C. Plastic 3 D. Plastic 4

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X A. Plastic 1 B. Plastic 2 C. Plastic 3 D. Plastic 4

Sorry, That is the wrong answer. Read the question again. What is the substance that you are trying to use with plastic. Look at the column that has data about that substance.

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A. Plastic 1 B. Plastic 2 X C. Plastic 3 D. Plastic 4

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A. Plastic 1 B. Plastic 2 C. Plastic 3 X D. Plastic 4

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A. Plastic 1 X B. Plastic 2 C. Plastic 3 D. Plastic 4

Good job!!!! Click on the arrow and Move on to question 2.

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Glass breaking into smaller pieces is an example of a:

A. Chemical Property

B. Physical Property

C. Chemical Change

D. Physical Change

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X A. Chemical Property

C. Chemical Change

D. Physical Change

After you think about the following, try again.

Chemical property – Anything that could happen to a specific substance that would change it into new substances.

Will the glass be a new substance after being broken?

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X B. Physical Property

C. Chemical Change

D. Physical Change

Physical Property – Characteristics of matter that distinguish one type of matter from another and can be observed without changing the Identity of the matter.

One of the physical properties of the glass has changed.

After considering the following, Try Again.

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X C. Chemical Change

D. Physical Change

After you think about the following, try again.

Chemical Change – The process by which a substances becomes a newand different substance.

Will the glass be a new substance after being broken?

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C. Chemical Change

X D. Physical Change

Excellent job!!!!!!!!!

Physical Change – Any time a characteristic of a substance changes butthe substance remains the same substance.

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Metal oxidizing (tarnishing / rusting) is an example of a:

C. Chemical Change

D. Physical Change

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X A. Chemical Property

C. Chemical Change

D. Physical Change

You’ll have to try again.

In this case there are already new substances.

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X B. Physical Property

C. Chemical Change

D. Physical Change

In this case there are new substances.

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X C. Chemical Change

D. Physical Change

Excellent Job!!!!!!!!

Chemical Change – The process by which a substances becomes a newand different substance.

Go on to question 4 by clicking on the right arrow.

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C. Chemical Change

X D. Physical Change

Physical Change – Any time a characteristic of a substance changes butthe substance remains the same substance.

When a physical change occurs you do not have any new substances.

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When describing an object which of the following is a chemical property?

A. Size

B. Shape

C. texture

D. flammability

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Size is one of the physical properties.

X A. Size

B. Shape

C. texture

D. flammability

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A. Size

X B. Shape

C. texture

D. flammability

Shape is one of the physical properties.

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A. Size

B. Shape

X C. texture

D. flammability

Texture is one of the physical properties.

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Excellent Job!!!!!!!!

A. Size

B. Shape

C. texture

X D. flammability

Go on to question 5.

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What will happen when a glowing splint is placed into a test tube of hydrogen?

A. It will burst into a flame.

B. It will make a popping sound.

C. It will sop glowing.

D. Nothing will happen.

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Hydrogen is highly reactive to the point of explosion in the presence of something that is burning or smoldering.

Remember the Hindenburg blimp.

X A. It will burst into a flame.

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You got that one right.

X B. It will make a popping sound.

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X C. It will sop glowing.

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X D. Nothing will happen.

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What will happen when a glowing splint is placed into a test tube of carbon dioxide?

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Carbon dioxide is used to put out fires.

It is not flammable.

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It is not flammable or explosive.

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Very Good!!!!!!

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Very Good!!!!!!

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What will happen when a glowing splint is placed into a test tube of oxygen?

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That is correct, Good Job!

Three things are needed for fire to burn; fuel, oxygen, and a heat source.

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What gas is given off by the reaction when vinegar and baking soda are mixed together?

A. oxygen

B. Carbon dioxide

C. hydrogen

D. chlorine

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X A. oxygen

B. Carbon dioxide

C. hydrogen

D. chlorine

Vinegar is an acid (< 7 ph) and baking soda is a base (> 7 ph). They will react chemically until the acid base relationship is neutralized (7 ph).

The gas that is given off is non-flammable and non-corrosive.

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That is correct, Good Job!

A. oxygen

X B. Carbon dioxide

C. hydrogen

D. chlorine

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A. oxygen

B. Carbon dioxide

X C. hydrogen

D. chlorine

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A. oxygen

B. Carbon dioxide

C. hydrogen

X D. chlorine

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When scientist use the scientific method to discover new things, their primary purpose is to:

A. Discover something that will make them rich.

B. Discover the variables the control an occurrence in nature.

C. Determine the cost of using the new information to make something useful.

D. Find something that is important to their government.

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X A. Discover something that will make them rich.

Most good scientists do earn a lot of money.

Their motivation usually is not the money though.

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X B. Discover the variables the control an occurrence in nature.

You got that one right.

Scientist are usually motivated simply by being the one to learn something new.

Go on to guest ion 10.

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X C. Determine the cost of using the new information to make something useful.

This is the job of a technologist not what motivates scientist.

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X D. Find something that is important to their government.

Scientists do sometimes work for their government. Usually this is only so they can get the funding they

need to do the necessary research.

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Plants use chemical changes in their life cycle.

Which of the following is not a chemical change used by plants?

A. cellular respiration

B. photosynthesis

C. water absorption

D. sugar production

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X A. cellular respiration

B. photosynthesis

C. water absorption

D. sugar production

You’ll have to try again.Cellular respiration is one of the chemical changes

that takes place in a plant.

Chemical change requires that new substances are made.

C6H12O6 + 6 O2 6 CO2 + 6 H2O sugar

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X B. photosynthesis

C. water absorption

D. sugar production

Photosynthesis is one of the chemical changes that takes place in a plant.

Chemical change requires that new substances are made.

6 CO2 + 6 H2O C6H12O6 + 6 O2

Sun light

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B. photosynthesis

X C. water absorption

D. sugar production

Excellent Job!!!!!!!!Water absorption is not one of the chemical

changes that takes place in a plant.

Chemical change requires that new substances are made. Water is the same before it is absorbed into the roots as it is after it has been absorbed into the roots.

No chemical change has occurred.

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B. photosynthesis

C. water absorption

X D. sugar production

Sugar production is one of the chemical changes that takes place in a plant.

Chemical change requires that new substances are made.6 CO2 + 6 H2O C6H12O6 + 6 O2

Sun light sugar

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Landfills have big problems with synthetic products because they:

A. decompose to quickly

B. decompose very slowly

C. explode after being buried

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X A. decompose to quickly

Sorry, you’ll need to try again.

Diapers decompose at an extremely slow rate.

Paper, food, garden waste products etc. decompose very rapidly.

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X B. decompose very slowly

How did you know that one? You must be smart.

Synthetic (man made) materials such as plastics decompose very slowly.

Go on to problem 12.

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X C. explode after being buried

Diapers decompose at an extremely slow rate.

Paper, food, garden waste products etc. decompose very rapidly.

Very few if any, synthetic materials will explode when buried.

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When water boils the bubbles coming to the surface are made of:

A. carbon dioxide

B. Oxygen

C. hydrogen

D. water vapor

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X A. carbon dioxide

B. Oxygen

C. hydrogen

D. water vapor

New substances are not being made.

The formula for water is H2O.

The physical change that has occurred is called a phase change.

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A. carbon dioxide

X B. Oxygen

C. hydrogen

D. water vapor

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A. carbon dioxide

B. Oxygen

X C. hydrogen

D. water vapor

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A. carbon dioxide

B. Oxygen

C. hydrogen

X D. water vapor

Great Job!!!! Keep up the good work.

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Water boils at 100 degrees Celsius at sea level.

It takes longer to boil an egg at higher altitudes, Why?

A. Water boils at lower temperatures at higher altitudes.

B. Water boils at higher temperatures at higher altitudes.

C. The density of the egg is greater at high altitudes.

D. Celsius degrees are not the same size unit at higher altitudes.

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X A. Water boils at lower temperatures at higher altitudes.

Very Good !!!

Go on to the next question.

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X B. Water boils at higher temperatures at higher altitudes.

As altitude increases atmospheric pressure decreases. The less pressure pushing down on a collection of water, the easier it is for it to boil.

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X C. The density of the egg is greater at high altitudes.

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X D. Celsius degrees are not the same size unit at higher altitudes.

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During phase change of water, ice to liquid, what happens to the temperature of the water.

A. It will increase until all of the ice has change to liquid.

B. It will stay the same.

C. It will decrease until all of the ice has change to liquid.

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Which of the following will not cause a change in the temperature at which water boils?

A. increase or decrease of latitude

B. increase or decrease of atmospheric pressure

C. increase or decrease of altitude

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X A. increase or decrease of latitude

There are only two things that can cause the temperature at which water boils to change. One of them is increasing or decreasing the altitude ate which you are attempting to boil the water. The other one can be directly

related to changes in altitude.

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A. increase or decrease of latitude

X B. increase or decrease of atmospheric pressure

Great Job !!!!!!!

If the pressure of the air pushing down on the surface of the liquid changes the temperature at which it will boil will change.

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X A. increase or decrease of latitude

C. increase or decrease of longitude

There are only two things that can cause the temperature at which water boils to change. One of them is increasing or decreasing the altitude ate which you are attempting to boil the water. The other one can be directly

related to changes in altitude.

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What will improve the validity of the data in an experiment?

A. the organization of data on a chart

B. conducting multiple trials

C. Drawing conclusions based on the data and your personal opinion.

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Which would you expect to be more accurate?

John formed his conclusion after 10 trials of his experiment.

Mary formed her conclusion after 3 trials of her experiment.

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Very good job !!!!

The more times an experiment is completed with success the more valid the conclusions will become.

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Which would you expect to be more accurate?

John formed his conclusion after 10 trials of his experiment.Mary formed her conclusion after 3 trials of her experiment.

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Look at the chart on the previous page and answer the following question.

What is happening from minute 2 – minute 4?

A. The temperature stays the same during phase change from ice to water.

B. The temperature is rising between phase changes.

C. The temperature stays the same during phase change from water to water vapor.

D. The thermometer is probably broken.

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X A. The temperature stays the same during phase change from ice to water.

Excellent !!!!

The temperature does not change while phase change from solid to liquid and from liquid to gas is occurring.

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X B. The temperature is rising between phase changes.

Go back to the question and click on information so you can study the graph.

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X C. The temperature stays the same during phase change from water to water vapor.

ClueGo back to the question and click on

information so you can study the graph.

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X D. The thermometer is probably broken.

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All of the ice is turned to water by the end of minute:

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X A. 2

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X B. 3

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X C. 4

Really good job !!!!!

Move on to the next question.

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X D. 5

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From the end of minute 4 to the beginning of minute 18 all of the water was in ______ phase.

A. Solid

B. Liquid

C. Gas

D. Plasma

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X A. Solid

B. Liquid

C. Gas

D. Plasma

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A. Solid

X B. Liquid

C. Gas

D. Plasma

You are to smart.

Move on to the next question

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A. Solid

B. Liquid

X C. Gas

D. Plasma

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A. Solid

B. Liquid

C. Gas

X D. Plasma

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A. decreases

B. increases

C. Stays the same.

D. It is impossible to tell.

Between phase changes (Ice to water vapor) the heat energy in the water.

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X A. decreases

B. increases

C. Stays the same.

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A. decreases

X B. increases

C. Stays the same.

I don’t know how you do it.

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A. decreases

B. increases

X C. Stays the same.

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A. decreases

B. increases

C. Stays the same.

X D. It is impossible to tell.

Analyze the following chart to answer the next few questions.

Dissolution Rate of 1 Cubic Centimeter of Sugarin 150 ml of water

Flask Procedure

Complete Dissolution Time, (Seconds)

Trial 1 Trial 2 Trial 3 Average

1 Sugar in water undisturbed 15.95 15.78 16.01 15.91

2Sugar ground and placed in undisturbed water

10.64 10.82 10.53 10.66

3Sugar ground, placed in water and swirled

1.78 1.82 1.86 1.82

4Sugar ground, placed in water, swirled, and heated

.42 .40 .52 .45

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A. Flask 1

B. Flask 2

C. Flask 3

D. Flask4

Look at the chart on the previous page and answer the following question. What was the most effect procedure for dissolving the sugar?

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X A. Flask 1

B. Flask 2

C. Flask 3

D. Flask4

What was the most effect procedure for dissolving the sugar?

Go back to the question and click on information so you can study the graph.Look at the column labeled “Average”

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A. Flask 1

X B. Flask 2

C. Flask 3

D. Flask4

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A. Flask 1

B. Flask 2

X C. Flask 3

D. Flask4

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A. Flask 1

B. Flask 2

C. Flask 3

X D. Flask4

I’m glad you understand how to use a table to find correct answers.

Keep up the good work, go on to the next question.

Flask Procedure

10.64 10.82 10.53 10.66

1.78 1.82 1.86 1.82

.42 .40 .52 .45

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A. Putting the sugar cube in the water

B. Grinding the sugar cube and putting it in the water

C. Swirling the sugar in the water

D. Heating the sugar in the water

Look at the chart on the previous page and answer the following question. Which action had the most effect on the dissolution rate of the sugar?

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X A. Putting the sugar cube in the water

Which action had the most effect on the dissolution rate of the sugar?

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X B. Grinding the sugar cube and putting it in the water

Which action had the least effect on the dissolution rate of the sugar?

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X C. Swirling the sugar in the water

Great job !!!!!!!

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X D. Heating the sugar in the water

Flask Procedure

10.64 10.82 10.53 10.66

1.78 1.82 1.86 1.82

.42 .40 .52 .45

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Look at the chart on the previous page and answer the following question. Which action had the least effect on the dissolution rate of the sugar?

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X A. Putting the sugar cube in the water

Keep up your good work !!!!!!

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X B. Grinding the sugar cube and putting it in the water

Go back to the question and click on information so you can study the chart.Look at the column labeled “Average”

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X C. Swirling the sugar in the water

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X D. Heating the sugar in the water

Flask Procedure

10.64 10.82 10.53 10.66

1.78 1.82 1.86 1.82

.42 .40 .52 .45

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A. The organization of the chart

B. The subject of the investigation

C. Presenting the data on a chart

D. Multiple trials for each flask

Look at the chart on the previous page and answer the following question. What has the greatest effect on the validity of the data in the chart most?

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X A. The organization of the chart

What has the greatest effect on the validity of the data in the chart most?

Validity is increased as the amount of data supporting a conclusion increases.

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X B. The subject of the investigation

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X C. Presenting the data on a chart

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X D. Multiple trials for each flask

You got that right, good job.

Standard 1 Objective 1: Describe the chemical and physical properties of various substances 121of...

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