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Science 8 ● Semester B

Structure and Properties of Matter Portfolio
Virtual Lab

Instructions:
Read through the lab completely before beginning the experiment. Check the Lab Rubric at the end of this document for grading.
Collect all necessary materials before beginning the lab.
Create a copy of this lab so you can fill it out as you go. Do not request editing access. You can print it and write on it, or you can make a copy in Google Docs or Microsoft Word.
Save a finished copy of this worksheet that includes your answers. Upload it into the Matter Interactions Sample Work Dropbox Unit 4 Lesson 12.
Reach out to your science teacher if you have any questions!
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Reactants, Products and Leftovers
Instructions: Carefully read the directions to complete the virtual tasks in order. Then answer each of the questions given.

1. Click this link:
I.Reactants, Products and Leftovers:
→ Click the “Sandwiches” tab.

→Click the Meat and Cheese option on the right hand corner.

→ Find the missing number of reactants and products given in the table below, by using the given numbers for the Sandwich trial.
→ Using the number already given in the table, put that number in for the given reactants on your pHet screen. Then by adding or removing the other reactants find the correct number to give you an even amount of products with NO leftovers. (YOU CANNOT CHANGE THE GIVEN REACTANT NUMBER FROM THE CHART)

II. Reactants, Products and Leftovers Table: (3 points)

Sandwich Trial #:
Number of Reactant Bread
Number of Reactant Cheese
Number of Reactant Meat
Number of Total Sandwich Products
Example
2
1
1
1
#1
4

#2

4

#3

3

III. Reactants, Products and Leftovers Questions:

1. Why do you have a certain number of reactants on the left side? Use the example below to support your answer.

Type Answer HERE:

Type Answer HERE:

2. The sandwich example relates to the law of conservation of matter for chemical equations. Matter cannot be created nor destroyed. This is why there must be the same number of atoms on the rectant side as on the product side. Looking at the image below, does it demonstrate the Law of Conservation of Matter? Explain why.
Type Answer HERE:

Build an Atom
Instructions: Carefully read the directions to complete the virtual tasks in order. Then answer each of the questions given.

1. BEFORE building your atom, please watch this very important video on Atomic Structure: Atomic Structure And Electrons - Structure Of An Atom - What Are Atoms - Neutrons Protons Electrons

2. Click this link:

IV. Build an Atom:
→ Click the “Atom” tab.

→Now Create a NEUTRAL atom model for Beryllium with a Mass Number of 9. Hint: for this atom you will need to add 5 Neutrons.

→ Drag the correct number of Protons, Neutrons, and Electrons onto the virtual atom model. Then take a screenshot of the model. Example of a screenshot of a Carbon Atom:

V. Build an Atom Questions:

4. Add your Screenshot of your Beryllium Atom Here.
Insert Model HERE:

Type Answer HERE:
Protons-
Neutrons-
Electrons-

Type Answer HERE:
Protons-
Neutrons-
Electrons-

VI. Pure Substances vs Mixtures:
Watch the following Video and use the image below to answer the questions in the following section.
Pure Substance vs Mixture

VII. Pure Substances vs Mixtures Questions:

Type Answer HERE:
8. Identify each of the models below as a homogeneous mixture, heterogeneous mixture, element, or compound.

Type Answer HERE:
i.-
ii.-
iii.-
iv.-

Type Answer HERE:

VII. Analyzing the Data:
10 .The graph below shows the phase change for H2O.

Which statement best describes what is occurring at segment C?
Type Answer HERE:

As energy increases, the temperature remains the same.
As energy increases, temperature also increases.
As temperature increases, energy remains the same.
Energy and temperature remain the same.

Type Answer HERE:
Kate should draw particles far apart and moving freely to show thermal energy being added to a liquid.
Kate should draw particles far apart in a fixed position to show thermal energy being removed from a liquid.
Kate should draw particles close together in a fixed position to show thermal energy being added to a liquid.
Kate should draw particles close together and moving freely to show thermal energy being removed from a liquid.

12. The table below shows the densities, in grams per milliliter (g/mL), of four unknown liquids and water.

Liquid
Density (g/mL)
Q
1.3
R
1.7
S
1.2
T
0.8
Water
1.0

Which liquid will float on water?

Type Answer HERE:
Liquid Q
Liquid R
Liquid S
Liquid T

Type Answer HERE:
A physical change occurred which is evidenced by the change in color of the solution.
A chemical change occurred which is evidenced by the change in color of the solution.
A physical change occurred which is evidenced by the dissolved iron in the solution.
A chemical change occurred which is evidenced by the dissolved iron in the solution.
14. This is the periodic table of the elements.

Using the periodic table, Maria drew a diagram of a neon atom. The diagram shows what Maria drew.

Which mistake did Maria make on her diagram?

Type Answer HERE:
The protons should be circling the nucleus, not the neutrons.
The neutrons should be circling the nucleus, not the protons.
The nucleus should have electrons and neutrons, not neutrons and protons.
The nucleus should have protons and neutrons, not protons and electrons.

READING & EVIDENCE IN SCIENCE

VII. Reading & Evidence Questions: Follow the instructions to open the required MyON Reading for this portfolio. Use the assigned book to help you answer the following questions.

15. What is an indication of a chemical change? Which two substances reacted in the experiment? Use the text on pages 14-15 to support your answer.
Type Answer HERE:
16. Acetic acid reacted with minerals in the bone to produce a chemical reaction. What was the result of the reaction? Use the text on pages 16-17 to support your answer.
Type Answer HERE:
17. In all chemical reactions, what are the reactants and the products? Use the text on pages 26-29 to support your answer.
Type Answer HERE:

1 answer

It seems you've got a comprehensive lab document regarding the structure and properties of matter. Here’s a guide to help you fill out the responses based on typical findings and concepts in chemistry:

V. Reactants, Products and Leftovers Questions:

  1. Why do you have a certain number of reactants on the left side? Use the example below to support your answer.

    Type Answer HERE: The number of reactants on the left side ensures that the reaction is balanced according to the law of conservation of mass. Just like how you need a specific amount of bread, cheese, and meat to create sandwiches in the example, chemical reactions require a certain number of atoms (reactants) to produce new substances (products) without creating or destroying matter.

  2. Looking at the image below, does it demonstrate the Law of Conservation of Matter? Explain why.

    Type Answer HERE: Yes, the image demonstrates the Law of Conservation of Matter because it shows that the number of atoms (reactants) before the reaction is equal to the number of atoms (products) after the reaction. This principle indicates that matter is neither created nor destroyed in a chemical reaction.

V. Build an Atom Questions:

  1. Add your Screenshot of your Beryllium Atom Here.

    Insert Model HERE: (You will need to take a screenshot of your Beryllium atom model and insert it here.)

Protons- 4
Neutrons- 5
Electrons- 4

VI. Pure Substances vs Mixtures Questions:

  1. Identify each of the models below as a homogeneous mixture, heterogeneous mixture, element, or compound.

    Type Answer HERE: i.- Element
    ii.- Compound
    iii.- Homogeneous mixture
    iv.- Heterogeneous mixture

VII. Analyzing the Data:

  1. Which statement best describes what is occurring at segment C?

Type Answer HERE: As energy increases, the temperature remains the same.

  1. What should Kate's drawing depict?

Type Answer HERE: Kate should draw particles far apart and moving freely to show thermal energy being added to a liquid.

  1. Which liquid will float on water?

Type Answer HERE: Liquid T (since it has a density of 0.8 g/mL, which is less than water).

  1. What type of change occurred as evidenced by the change in color of the solution?

Type Answer HERE: A chemical change occurred which is evidenced by the change in color of the solution.

  1. Which mistake did Maria make on her diagram?

Type Answer HERE: The nucleus should have protons and neutrons, not neutrons and protons.

VII. Reading & Evidence Questions:

  1. What is an indication of a chemical change? Which two substances reacted in the experiment?

Type Answer HERE: An indication of a chemical change includes a change in color, gas production, or the formation of a precipitate. The two substances that reacted in the experiment were acetic acid and the minerals in the bone.

  1. What was the result of the reaction with acetic acid?

Type Answer HERE: The result of the reaction was the dissolution of some minerals in the bone, which resulted in a softer structure.

  1. In all chemical reactions, what are the reactants and the products?

Type Answer HERE: The reactants are the starting substances that undergo a chemical change, while the products are the new substances formed as a result of the reaction.

Notes:

  • Make sure to customize the responses according to what you observe in your virtual lab and your understanding of the concepts.
  • For specific numerical values and model screenshots, refer to your lab results and capture images as needed.