MC	*7^th Grade Integrated Science*	*Standard:* 01
*Objective:* 01. Describe the structure of matter in terms of atoms and molecules.
*ILO:*

Which is the smallest particle?

a. atom

b. molecule

c. compound

d. solid

Correct Answer: a

MC	*7^th Grade Integrated Science*	*Standard:* 01
*Objective:* 01. Describe the structure of matter in terms of atoms and molecules.
*ILO:*

Which is too small to view with a microscope?

a. an atom

b. a cell

c. one bacteria

d. a single virus

Correct Answer: a

MC	*7^th Grade Integrated Science*	*Standard:* 01
*Objective:* 01. Describe the structure of matter in terms of atoms and molecules.
*ILO:*

The particles that are bound together the tightest are found in a

a. gas

b. liquid

c. solid

d. mixture

Correct Answer: c

MC	*7^th Grade Integrated Science*	*Standard:* 01
*Objective:* 01. Describe the structure of matter in terms of atoms and molecules.
*ILO:*

What happens to particles of liquid water when the water is heated?

No change takes place.
They speed up and the space between them increases.
They speed up and the space between them decreases.
They slow down and the space between them increases.
They slow down and the space between them decreases.

Correct Answer: b

MC	*7^th Grade Integrated Science*	*Standard:* 01
*Objective:* 01. Describe the structure of matter in terms of atoms and molecules.
*ILO:*

Which of the following physical states has particles that vibrate in place and do not move past their neighbors?

a. gas

b. liquid

c. molecule

d. solid

Correct Answer: d

MC	*7^th Grade Integrated Science*	*Standard:* 01
*Objective:* 01. Describe the structure of matter in terms of atoms and molecules.
*ILO:*

Which of the following physical states has particles that move very fast and travel as far apart as they can?

a. gas

b. liquid

c. molecule

d. solid

Correct Answer: a

MC	*7^th Grade Integrated Science*	*Standard:* 01
*Objective:* 01. Describe the structure of matter in terms of atoms and molecules.
*ILO:*

Which of the following physical states has particles that move to take the shape of whatever container they are in?

a. gas

b. liquid

c. molecule

d. solid

Correct Answer: b

MC	*7^th Grade Integrated Science*	*Standard:* 01
*Objective:* 01. Describe the structure of matter in terms of atoms and molecules.
*ILO:*

Which of the following ways are solids and gases alike?

a. Both have particles that move very fast.

b. Both have particles that move very slow.

c. Both are made of particles.

d. Both have particles that are very close together.

Correct Answer: c

MC	*7^th Grade Integrated Science*	*Standard:* 01
*Objective:* 01. Describe the structure of matter in terms of atoms and molecules.
*ILO:*

Match the definition with the correct process or state of matter.

____ 1. has a definite volume but not a definite shape a. condensation

____ 2. has a definite shape and volume b. freezing

____ 3. forms when liquids boil c. gas

____ 4. a change from gas to liquid d. liquid

e. solid

Correct answers:

1. d

2. e

3. c

4. a

MC	*7^th Grade Integrated Science*	*Standard:* 01
*Objective:* 01. Describe the structure of matter in terms of atoms and molecules.
*ILO:*

Models are used to represent atoms. The model used today is not the same as the model used 200 years ago. What is a possible explanation for the change in the atomic model?

a Scientists conducted further experiments on atoms and science conclusions may change as new evidence is found.

b. Scientists in the past did not have the modern equipment used to see atoms and science conclusions may change as new equipment is invented.

c. Scientists conducted further experiments and were then able to make the modern, completely correct model.

d. Scientists in the past could not see atoms, but now that scientists have seen the atom, they have been able to develop the correct, final model.

Correct Answer: a

I	*7^th Grade Integrated Science*	*Standard:* 01
*Objective:* 01. Describe the structure of matter in terms of atoms and molecules.
*ILO:*

1. Which state of matter is represented by diagram B?

a. gas

b. liquid

c. solid

d. plasma

2. What will happen to the particles of matter in diagram A if heat is lost ?

a. particles move more rapidly

b. particles resemble diagram C

c. particles will not change

d. particles move farther apart

e. particles move less rapidly

Correct Answers:

1. c

2. e

I	*7^th Grade Integrated Science*	*Standard:* 01
*Objective:* 01. Describe the structure of matter in terms of atoms and molecules.
*ILO:*

Look at each of the drawings below. The circles in each represent particles. Determine in each picture if the particles are a solid, a liquid or a gas, and state how you know using the diagram.

What is it?__________

Explain how you know based on the diagram:

What is it?__________

Explain how you know based on the diagram:

What is it?__________

Explain how you know based on the diagram:

Correct Answers:

a. Liquid, the particles are not very close together like a solid, but they are not spread out as far as they can go, like a gas.

b. Gas, the particles are spread as far apart as they can go in the container.

c. Solid, the particles are packed close together.

E	*7^th Grade Integrated Science*	*Standard:* 01
*Objective:* 01. Describe the structure of matter in terms of atoms and molecules.
*ILO:*

Describe the differences between solids and liquids using the spacing of particles and their movement.

Correct Answer: Solids are made up of molecules that move so slowly they actually just vibrate in place and are arranged very close to one another. Liquids are made of molecules that move faster than those of solids and are able to move past their neighbors. They will take the shape of any container they are in.

E	*7^th Grade Integrated Science*	*Standard:* 01
*Objective:* 01. Describe the structure of matter in terms of atoms and molecules.
*ILO:*

Describe the differences between liquids and gases using the spacing of particles and their movement.

Correct Answer: Gases are made of molecules that move very quickly and they will spread as far apart from one another in any space they are in. Liquids are made of molecules that move slower than those in gases.

E	*7^th Grade Integrated Science*	*Standard:* 01
*Objective:* 01. Describe the structure of matter in terms of atoms and molecules.
*ILO:*

Describe the differences between solids and gases using the spacing of particles and their movement.

Correct Answer: Gases are made of molecules that move very quickly, and they will spread as far apart from one another in any space they are in. Solids are made up of molecules that move so slowly they are just vibrating in place and are arranged very close to one another.

E	*7^th Grade Integrated Science*	*Standard:* 01
*Objective:* 01. Describe the structure of matter in terms of atoms and molecules.
*ILO:*

1. How do we know that matter is made of particles? Give examples of evidence.

2. How has technology helped to support this theory? Explain your answer.

Ideal answers:

1. The different states of matter (solid, liquid, gas) are easily explained if matter is made of particles that are in motion. The motion of particles is faster in gases, medium in liquids and slow in solids. This can be demonstrated by diffusion.

2. Technology has helped to support the theory that matter is made up of particles because we have tools and instruments that can "see" the particles. X-ray machines can take pictures of the even smaller particles (atoms) in objects.

P	*7^th Grade Integrated Science*	*Standard:* 01
*Objective:* 01. Describe the structure of matter in terms of atoms and molecules.
*ILO:*

Structure of Matter Lab

Teacher Notes:

Time Period: 1 class (45 minutes)

Objective: Students will have the opportunity to discover the structure of matter (molecules) through investigations of simple forms of matter.

Materials: sugar cube, small piece of word, sand paper, plastic knife and spoon, cup, wax paper, slice of lemon, toothpick, plastic Ziploc bag, eyedropper, hand lens.

Answers to Analysis/Conclusions:

1. particle

2. a water molecule

3. The smell comes from a lemon atom.

4. No, all the items could be broken down into smaller parts or particles.

5. Yes. We did not change any of the properties. Water is still water and wood shavings are still wood. Only when you divide the actual atom or molecules then the properties change.

Student Information:

Structure of Matter Lab

Objective: Students will have the opportunity to discover the structure of matter (molecules) through investigations of simple forms of matter.

Materials: sugar cube, small piece of word, sand paper, plastic knife and spoon, cup, wax paper, slice of lemon, toothpick, plastic Ziploc bag, eyedropper, hand lens and/or simple blister microscope, small hammer.

Gather your materials as directed by your teacher.

Use what tools you need to complete the following 4 activities.

Activity 1

Sugar Cube

1. Study the cube and list 3 properties that you observe.

2. Now break the cube into smaller pieces. What are these smaller pieces called?

3. Can you break these pieces into even smaller pieces? If you can, do so.

4. Look at the smaller pieces of sugar. Describe 3 properties of these smallest pieces.

Activity 2

Wood

1. Look at the piece of wood. Examine its structure. List 3 properties of this piece of wood.

Now obtain the smallest piece of wood possible by using any of the materials provided. Describe what you did.

2. Observe three properties of this new smallest piece of wood.

Activity 3

Water

1. Fill the cup half full of water. Observe and describe 3 properties of the water.

2. Now try to obtain the smallest piece of water. Describe how you obtained this smallest piece and observe 3 properties of this particle.

Activity 4

Lemon

1. Place a piece of lemon on a paper towel and observe and describe 3 properties of this lemon.

2. Identify the smallest piece of the lemon and describe 3 properties of this particle and how you obtained the particle.

Analysis/Conclusion

1. What is the term you used to describe the “smallest part” of either the wood or lemon activity?

2. What is the smallest part of water you can break down and still have water?

3. What can you infer about the smallest pieces of the lemon that you smell?

4. Was there any item you worked with that you could not break down into smaller pieces? Explain why or why not.

5. Are the properties of the smallest particles from each item the same as the properties of the larger whole that they came from? Yes or No? Defend your answer.