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How Atoms Bond: Ionic Bonds

How Atoms Bond: Ionic Bonds | 8th Grade Science Finds | Scoop.it
How do atoms bond to form molecules? We use common table salt to show what happens between the electrons and nuclei in atoms of sodium and atoms of chlorine to bond them together into crystals of sodium chloride (NaCl).

 

Nice video which simply explains the basics of electrons, protons, positive & negative charges. The speaker adds some mnemonic devices to help us remember the facts and vocab. A quiz highlight the most important points, too. Probably would require a couple of viewings to remember all of the facts. Flipped classroom idea?

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8th Grade Science Finds
Informational texts, videos and more to extend, explain or add literacy skills to current curriculum
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MIT+K12 | Channel | MIT Video

MIT+K12 | Channel | MIT Video | 8th Grade Science Finds | Scoop.it
MIT+K12 | The MIT-K12 project puts MIT as a publicly accessible “experiential partner” to the country’s K through 12 educators.
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Chanelle Savich's curator insight, May 9, 2013 5:43 PM

Science & Engineering resources from the folks who know Science & Engineering.

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Lessons Worth Sharing

Lessons Worth Sharing | 8th Grade Science Finds | Scoop.it
Use engaging videos on TED-Ed to create customized lessons. You can use, tweak, or completely redo any lesson featured on TED-Ed, or create lessons from scratch based on any video from YouTube.
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Basics of the Boson, How small is small, Anti-matter, dark matter, the beginnings of the universe . . . lessons, short videos, etc.

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The Next Generation Science Standards | Next Generation Science Standards

The Next Generation Science Standards | Next Generation Science Standards | 8th Grade Science Finds | Scoop.it
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TED Fellow Greg Gage turns a smartphone into a microscope

TED Fellow Greg Gage turns a smartphone into a microscope | 8th Grade Science Finds | Scoop.it
At TED2013, TED Fellow Greg Gage demonstrates the BYB SmartScope—which turns a smartphone into a microscope.
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Inanimate objects brought to life: 7 intriguing TED Talks

Inanimate objects brought to life: 7 intriguing TED Talks | 8th Grade Science Finds | Scoop.it
Today's talk features self-healing concrete. Here, other TED Talks about inanimate objects infused with life.
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Scientific method and invention

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Inquiry-Based Activities Collection

Inquiry-Based Activities Collection | 8th Grade Science Finds | Scoop.it
These activities were submitted by participants in sessions at the North Central GSA meeting and at the AGU Fall Meeting on Inquiry-Based, Hands-On Classroom Exercises, Lab Demonstrations, and Field Investigations ...
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National Association of Geoscience Teachers

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Multimedia: Energy Changes in Chemical Reactions | Chapter 6, Lesson 7 | Middle School Chemistry

Multimedia: Energy Changes in Chemical Reactions | Chapter 6, Lesson 7 | Middle School Chemistry | 8th Grade Science Finds | Scoop.it
Videos and illustrations from Chapter 6, Lesson 7 of the Middle School Chemistry Unit produced by the American Chemical Society...

 

Really nice slides/videos/animations providing easy to see examples of endothermic and exothermic reactions. Bottom of webpage has links to related topics or related resources on the same topic. 

Great source!

 

8th Science: Chemical reactions

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Chemistry Resources at BPC: Chemistry at Brewton-Parker College

Chemistry Resources at BPC: Chemistry at Brewton-Parker College | 8th Grade Science Finds | Scoop.it

Look at "Links to Other Great Chemistry Websites" at the bottom of this webpage.

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TLC Home "Converting Non-Believers with Spray Foam Insulation"

TLC Home "Converting Non-Believers with Spray Foam Insulation" | 8th Grade Science Finds | Scoop.it
A good way to convince people to go green is to aim for the pocketbook. Learn more about coverting non-believers with spray foam insulation.

 

8th Science: Exothermic Reactions in a real life situation

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Reaction rates: Does a 10°C temperature rise double reaction rates?

Does a 10°C temperature rise double reaction rates?

"The assertion that "a 10° temperature rise doubles reaction rates" is just a rule of thumb, not a law of nature. Like most rules of thumb, "thumbtimes it works, and thumbtimes it doesn't." In fact, relying this rule to predict the effect of temperature on the rate of a chain reaction can be a catastrophic mistake."

 

This article from Frostburg University's Fred Senese contains good quality information and an equation calculator for activation energy. The information isn't simply written; it's probably best for the student who wants to extend his learning on this topic of Reaction Rates.

 

8th Science: reaction rates

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Extra chromosome 21 removed from Down syndrome (trisomy 21) cell line

Extra chromosome 21 removed from Down syndrome (trisomy 21) cell line | 8th Grade Science Finds | Scoop.it

University of Washington scientists have succeeded in removing the extra copy of chromosome 21 in cell cultures derived from a person with Down syndrome, a condition in which the body’s cells contain three copies of chromosome 21 rather than the usual pair. A triplicate of any chromosome is a serious genetic abnormality called a trisomy. Trisomies account for almost one-quarter of pregnancy loss from spontaneous miscarriages, according to the research team. Besides Down syndrome (trisomy 21), some other human trisomies are extra Y or X chromosomes, and Edwards syndrome (trisomy 18) and Patau syndrome (trisomy 13), both of which have extremely high newborn fatality rates.

 

The targeted removal of a human trisomy, they noted, could have both clinical and research applications. In live births, Down syndrome is the most frequent trisomy. The condition has characteristic eye, facial and hand features, and can cause many medical problems, including heart defects, impaired intellect, premature aging and dementia, and certain forms of leukemia, a type of blood cancer.


Via Dr. Stefan Gruenwald
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A new approach to water desalination - MIT News Office

A new approach to water desalination - MIT News Office | 8th Grade Science Finds | Scoop.it
Graphene sheets with precisely controlled pores have potential to purify water more efficiently than existing methods.

 

Piggybacking on the other article from MIT regarding looking at water shortages differently and trying to waste less of it (because goodness knows, we waste a lot--ever heat up your shower water before stepping into it, for instance?), here's a way out -- get water out of the ocean instead to solve the same problem!

 

Good idea or not?

 

 

Graphene sheets are one atom thick; this practical use of knowledge of the atom makes this a good info text article for 8th Science.

 

S.08.PS.03a Demonstrate an understanding of how the structure of an atom is related to chemical reactions.

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Science World: Name that Element!

Science World: Name that Element! | 8th Grade Science Finds | Scoop.it

Students should use Ebsco Login information on page 24 of the assignment notebook.

 

Hints given for students trying to identify an element based on its versatile uses. Goes on to show and describe the Periodic Table of Elements.

 

S.08.PS.02c Analyze the Periodic Table.

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Why science should be a story | MIT Video

Why science should be a story | MIT Video | 8th Grade Science Finds | Scoop.it
PhD candidate Tyler DeWitt discusses how scientists could better focus on communicating their main ideas through appealing narratives.
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The basics of the boson - Dave Barney and Steve Goldfarb

The basics of the boson - Dave Barney and Steve Goldfarb | 8th Grade Science Finds | Scoop.it
In 2012, scientists at CERN discovered evidence of the Higgs boson. The
what? The Higgs boson is one of two types of fundamental particles and
is a particular game-changer in the field of particle physics, proving
how particles gain mass.
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Backyard Brains Experiments

Backyard Brains Experiments | 8th Grade Science Finds | Scoop.it
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Lots of brain-science experiments at the beginner-intermediate-advanced levels. 

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DNA Roulette

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Michigan State University's Genetics "game" --what chance does a person have to get a certain genetic trait or disease? Betting is involved!

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Microbes by Dilys Rose

Microbes by Dilys Rose | 8th Grade Science Finds | Scoop.it
smaller than the eye can see the living dead
/ floating in limbo awaiting a host
/
/ we don't discriminate we'll invade anyone
/ occupy your secret places incubate and...
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Poem about the determination of microbes to restore a global equillibrium. Scottish Poetry Library

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Static Electricity 1: Introducing Atoms - Science NetLinks

Static Electricity 1: Introducing Atoms - Science NetLinks | 8th Grade Science Finds | Scoop.it
In this lesson, students are asked to review websites to learn about the atom's basic structure and the positive and negative charges of its subparticles.
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Supersaturated Solution at Steve Spangler Science

Supersaturated Solution at Steve Spangler Science | 8th Grade Science Finds | Scoop.it
Supersaturated Solution - Did you ever sneak an extra spoonful of sugar into your Kool-Aid as a kid but got caught when Mom saw the undissolved sugar at the bottom of the glass?

 

"The process of crystallization gives off heat. It’s said to be exothermic. That’s why the solution is used in hand warmers (the old-style liquid-type of hand warmers).

 

How do Hand Warmers Work? The triggering device initiates the rapid solidification of the solution. In the case of salt solutions that release or absorb large amounts of energy during phase changes (common table salt sodium chloride does not do this), the solidification process is a rapid crystallization that releases a large amount of heat at the salt solution's normal melting temperature."

 

8th Exothermic Reactions

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Reaction rates: What are everyday examples of temperature effects on reaction rate?

What are everyday examples of temperature effects on reaction rate?
From a database of frequently asked questions from the Reaction rates section of General Chemistry Online.

 

8th Science: Reaction Rates

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Puts it all in perspective » Interactive Graphics: Magnifying the Universe

A joint project of Killer Infographics and Mandril Design. Interactivity creates greater reader engagement, which, in turn, generates interest and educates a wide spectrum of people. This particular interactive infographic was picked up by hundreds of websites, including National Geographic!

 

The precision of the interactive scalability highlight the importance of accuracy in successful infographics - Killer Infographics will never publish any data they won't stand behind!


Via Dr. Stefan Gruenwald
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Szabolcs Kósa's comment, November 24, 2012 4:19 PM
amazing.
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An integrated map of genetic variation from 1,092 human genomes

An integrated map of genetic variation from 1,092 human genomes | 8th Grade Science Finds | Scoop.it

By characterizing the geographic and functional spectrum of human genetic variation, the 1000 Genomes Project aims to build a resource to help to understand the genetic contribution to disease. The genomes of 1,092 individuals from 14 populations, constructed using a combination of low-coverage whole-genome and exome sequencing were analyzed. By developing methods to integrate information across several algorithms and diverse data sources, a validated haplotype map of 38 million single nucleotide polymorphisms, 1.4 million short insertions and deletions, and more than 14,000 larger deletions were provided. Individuals from different populations carry different profiles of rare and common variants, and low-frequency variants show substantial geographic differentiation, which is further increased by the action of purifying selection. An evolutionary conservation was found and coding consequence are key determinants of the strength of purifying selection, rare-variant load varies substantially across biological pathways, and each individual contains hundreds of rare non-coding variants at conserved sites, such as motif-disrupting changes in transcription-factor-binding sites. This extensive resource, which captures up to 98% of accessible single nucleotide polymorphisms at a frequency of 1% in related populations, enables researchers to perform a detailed analysis of common and low-frequency variants in individuals from diverse backgrounds.


Via Dr. Stefan Gruenwald
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Science News for Kids: Secret of a Lifetime (Neutrons)

Science News for Kids: Secret of a Lifetime (Neutrons) | 8th Grade Science Finds | Scoop.it

Students should use Ebsco Login information found on page 24 of the assignment notebook.

 

"The article offers information on neutron and discusses on the neutron's average lifetime. It stated that neutron, unlike proton, is neutral and isloated within the atomic nucleus. It also discusses on the neutron's life that in end turns into a proton through a process known as beta decay and informs that neutrons are usually bound in a nucleus."

 

Lexile: 1270

 

8th grade science target:
S.08.PS.02b Describe the Structure of an Atom.

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