Welcome to 8th Grade Science

 

12/15/15 

Complete the guided worksheets for homework if you did not complete it in class. It is due on Friday.

12/8/15 

Complete the research on Endothermic/Exothermic reactions if you did not complete them in class. After researching the reactions, make sure to document the procedures for each experiment and include the materials. (Also check the homework calendar for assignments)

 

Element Project Part I of III  due on 11/11/15.

Rubric as follows:

Project Format Choices: Limit all projects to one sheet of 8 ½ by 11 sheet of paper

1) Newsletter                2) Flyer                        3) Brochure/Pamphlet             

_____ (4 pts) element name, atomic number, atomic symbol, atomic mass

_____ (3 pts) number of protons, number of neutrons, number of electrons

_____ (2 pts) electron configuration (Electron setup), valence electrons (electrons in the outermost shell)

_____ (2 pts) when discovered/first produced, who discovered/who produced

_____ (1 pts) where it can be currently found/how made

_____ (4 pts) 4 physical descriptions: metal, non-metal, metalloid, color, texture, state, density, melting point,

boiling point, physical state (S, L, G) at room temperature

_____ (5 pts) how it is used – AT LEAST 5 common uses

_____ (2 pt) group, period

_____ (3 pt) Pictures or drawings of element – visual aids to enhance project (at least 3)

_____ (2 pts) Neatness/spelling and color/creativity

_____ (2 pts) List of sources. For example, books, web sites, magazines, etc. (can be on a separate

sheet or incorporated into information sheet). Must also cite sources for all images/pictures. Sources must be specific. Google images or Wikipedia.com are NOT specific sources. Copy and paste complete URL’s.  

_____ (5 pts) Rubric attached

 Total possible points = 35  

 

Your next task will be to make a model of an atom. Since atoms are hard to visualize, building a model will help us understand the behavior of atoms. Your model will be based on the Bohr model of the atom. Although the Bohr model of an atom is outdated, it still reinforces the concept that electrons are located on various energy levels or outer levels. (Modern atomic theory states the electron regions have complex shapes, therefore it is not feasible to build an atom model based on modern atomic theory).

 

Your atom model should be 3‐Dimensional and include protons, neutrons, and electrons in the appropriate locations. 

 

Your project does not have to be an expensive one. There should be several building materials you can find for free around your home that can be used for your project. Be creative!

 

• Edible projects are welcome as long as the food is non-perishable; this is not a mold experiment! (marshmallows, gum drops, macaroni, etc).

 

• Please check with your parents for approval before nabbing materials from around your house!

 

• Maximum dimensions: 3 ft. x 3ft (I have to fit all the projects in the room)

 

Below is the rubric for your model. Refer to it often when building your model:

Part II: 3-Dimensional Atomic Model

_____ (2 pts) Correct number of protons

_____ (2 pts) Correct placement of protons

_____ (2 pts) Correct number of neutrons

_____ (2 pts) Correct placement of neutrons

_____ (2 pts) Correct number of electrons

_____ (5 pts) Correct placement of electrons

_____ (2 pts) Relative size of particles (protons and neutrons are the same size and electrons are smaller)

_____ (3 pts) Key -  identifying each particle and number of each particle

_____ (5 pts) Craftsmanship – project is structurally sound and will not easily fall apart or lose pieces; is

attached to a base/stand or can be hung up

_____ (5 pts) Creativity – well chosen materials, color, uniqueness, etc.

_____ (5 pts) Rubric attached

Total / 35

Part III: Disappearing Elements

Imagine, one day out of nowhere, elements in the periodic table suddenly began slowly disappearing from the face of the Earth. Depending on the uses of the particular element, the effects could be catastrophic. From your research regarding the uses of your element, your task is to write a creative fictional story about the day your element slowly began disappearing.

You may need to do additional research to find more uses of your element to help you write your story. It may help to research not only uses of the pure element, but compounds the element forms and how the compounds are used. For example, sodium combines with chlorine to make table salt - NaCl. If either of these elements started disappearing so would table salt.

Find a variety of uses for your element like medicine, engineering, nature and everyday life. Make sure your uses are actually different. For example, saying that silver is used to make earrings, necklaces, bracelets and other jewelry is only ONE use – all jewelry.

To help ensure there are 5 uses, highlight each key use in your paper. In the example above, you would highlight the word “jewelry”.

Rubric:

_____ (2 pts) Neatness - Project is typed with appropriate heading

(Name, class period, date, title that includes the name of the

element)

_____ (3 pts) Length - Minimum 1 page, maximum 2 pages

(double spaced, normal margins, 12 pt font,

times new roman)

_____ (10 pts) Uses - 5 specific distinct uses of the element and how everyday life

would be affected by the loss of this element. The 5 uses are highlighted.

_____ (10 pts) Creativity – There is a fun, creative plot to the story complete with characters, action

and an ending – happy or sad.

_____ (5 pts) Rubric attached                                   Due Date 12/4/15

Total Points/30