Welcome back! This will be an exciting school year!

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Here is a website that will help you to organize your school work!  http://pbskids.org/itsmylife/school/time/tips2.html

Mrs. O'Donnell's Summer Science Journal:

Entry One:  My husband and I traveled to Gettysberg, Antietam and Harper's Ferry this summer.  On our journey around Antietam Battlefield, I saw these strange rolls in a nearby field.  I questioned what they were, and found out that they were hay.  I was surprised because I thought hay was always in bales (square).  I did a little research and learned that the round bales are easier to bale because the machines do all the work, incuding the lifting, which  is a good thing, because the round bales weigh way more than the square ones.  The round ones also keep the hay fresher longer, and the water from the inside, and are often used to feed cattle.  The square ones are used to feed horses, who are more particular and won't eat their food if it's started to spoil.

Entry 2:  Walking along the beach one day, saw these amazing stumps and rocks covered in barnacles.  

Barnacles, like crabs and lobsters, their distant cousins, are members of the phylum Arthropoda, the largest and most diverse group of animals on earth. Barnacles alone account for more than 1200 known species. Some are fresh water inhabitants while a few live as parasites on other animals. Some of them, like the acorn barnacle, grow directly on a hard rocky surface while others like the goose barnacle attach to it by means of a stalk.

Life as a barnacle is not easy. A marine barnacle living in the inter-tidal area is alternately lashed by fierce waves one moment and roasted by the sun the next. When exposed to the sun, barnacles stop all activities and concentrate on keeping themselves moist. They live in shells made of calcium carbonate, (the substance found in marble and chalk) and rely on the tides to bring their food. Barnacles have six pairs of legs that form a type of net to filter plankton which is their food.

Entry 3:  Walking along the beach another day (guess what I spent a lot of time dong this summer?) I spotted this interesting artifact.  Can you guess what it is?  

Entry 4: Covered Bridges.  In our trip to Gettysberg, one of the places we visited was Sachs Covered Bridge.  The bridge was beautiful, and I couldn't help but be amazed by the way it was constructed.  

covered bridge is a timber-truss bridge with a roof and siding which, in most covered bridges, create an almost complete enclosure.[1] The purpose of the covering is to protect the wooden structural members from the weather. Uncovered wooden bridges have a lifespan of only 10 to 15 years because of the effects of rain and sun.  truss bridge is a bridge whose load-bearing superstructure is composed of a truss, a structure of connected elements forming triangular units. The connected elements (typically straight) may be stressed from tension,compression, or sometimes both in response to dynamic loads. Truss bridges are one of the oldest types of modern bridges. In the picture above you can see all the triangles that make up this bridge. 

Bridges having covers for reasons other than protecting wood trusses, such as for protecting pedestrians and keeping horses from shying away from water, are also sometimes called covered bridges.


Mrs. ODonnell's Highland Science Fan page: 
Those of you who have an IPod Touch, and IPhones or an  IPad can download a FREE BrainPOP app for your device.  
Carol Ann ODonnell,
Sep 6, 2016, 6:37 AM
Carol Ann ODonnell,
Sep 7, 2016, 8:04 PM