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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:

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

Sure! Below, I've outlined how to fill out the various sections of your virtual lab along with sample answers. You can modify them as needed based on your observations and findings.

I. Reactants, Products and Leftovers Table

| 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 | 2 | 4 | | #2 | 3 | 1 | 1 | 4 | | #3 | 3 | 1 | 1 | 3 |

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 is determined by the specific ingredients required to produce a complete product. In the sandwich example, if I need a certain number of breads, cheeses, and meats to make sandwiches, each must be present in specific amounts to achieve the desired total number of sandwiches, ensuring there are no leftovers.

IV. Build an Atom Questions

  1. Add your Screenshot of your Beryllium Atom Here.
    Insert Model HERE: (Insert your screenshot of the Beryllium Atom model).
  • 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.

i. - Compound
ii. - Element
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.

  2. Which liquid will float on water?
    Type Answer HERE: Liquid T (because it has a density less than water).

  3. Which mistake did Maria make on her diagram?
    Type Answer HERE: The nucleus should have protons and neutrons, not neutrons and electrons.

READING & EVIDENCE IN SCIENCE

  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 is the release of gas, an observable color change, or the formation of a precipitate. In the experiment, acetic acid and the minerals in the bone reacted to produce a change.

  2. What was the result of the reaction?
    Type Answer HERE: The result of the reaction between acetic acid and minerals in the bone was the dissolution of the minerals, indicating a chemical change.

  3. What are the reactants and the products in all chemical reactions?
    Type Answer HERE: In all chemical reactions, the reactants are the starting substances that undergo change, and the products are the new substances formed as a result of the chemical reaction.

Make sure to personalize your answers based on your specific findings in the virtual lab, particularly in the sections where you are asked for your observations or data. Good luck with your portfolio submission!