Science Activity 1: Week September 11 - 15, 2017
Melting Icebergs: Science Inquiry Activity
The presented melting iceberg experiment is a great activity to present students with an inquiry of the effects of such events. This task is structured and contains the necessary guidance as to permit students construct and formulate their own questions as to understand the reality and seriousness of the melting of icebergs and the polar ice caps.
The experiment demonstrates that as the floating ice melts the volume of water increases. What would happen if the polar ice caps melted? There will be a combination of events: 1) rising sea levels, 2) accelerate global warming, 3) changes ecosystems, 4) threatens human culture and economics, and 5) increases seawater freshwater contamination, which can effect coastal erosion. All these in one way or the other are interconnected.
One of the most talked about concerns is that of the rising of the sea levels. It has been documented that the melting itself of icebergs doesn't affect sea levels. On the other end, the melting of the polar ice caps will because as the ice melts, the temperature of the seawater increases. It is important to mention that the polar ice caps help reflect sunlight back into the atmosphere; if the ice is melted the sunlight (heat) will be absorbed by the ocean thus increasing its temperature which will case the water to expand an rise. The rising of the temperature will accelerate global warming.
Global warming has been a topic of national an global importance among communities of scientists an political officials. This itself can bring other questions (inquires) from this activity:
A. How does global warming affect the polar ice caps?
B. Have governmental agencies develop a realistic plan to slow own global warming?
* In the last 100 years global warming has increased 1/2 degree
C. Currently, are the 2 mayor polar ice caps in danger? (Artic & Antarctica)
D. How will it directly affect populations of humans and other species?
All these questions can have its instructional value during this activity. The great part of these types of activities is that it invites students to formulate their own inquiries and look for answers. Definitely, this is an excellent activity using inquiry base instruction in which active learning is in place. Students will engage in the activity by formulating questions and collecting data, which they will use to present and reflect on. Students will conduct the experiment and apply their learning to their lives and society (Hammerman, 2006).
References:
Hammerman, E.L.(2006). Becoming a better science teacher: 8 steps to high quality instruction and student achievement. Thousand Oaks, CA: Sage Publications.
Views of Earth: Formation of Mountains
ReplyDeleteRESEARCH QUESTIONS
1) Explain how a global positioning system (GPS) works:
A global positioning system, of GPS, works when at least four GPS satellites gain information about its location and the current time. The GPS then calculates how far other nearby satellites are, and finds your location using trilateration. This is when the GPS finds a satellite above you as well as a few other satellites to find out where their circles intersect. This is how the GPS finds your location. (The circle shows the area that the satellite would work in.) (www.physics.org/article-questions.asp?id=55)
2) How accurate are GPS?:
GPS are accurate ninety-five (95%) percent of the time. Many GPS receivers have an accuracy of about ten to fifty feet. Many GPS have WAAS, or Wide Area Augmentation Systems. This is used "to more accurately calculate their position." (www.gps-basics.com/faq/q0116.shtml)
Sasha Roman, 802
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ReplyDelete1. Explain how a global positioning system (GPS) works:
ReplyDeleteThe Global Positioning System is made up of satellites, ground stations, and receivers.
Satellites act like the stars in constellations—we know where they are supposed to be at any given time.
The ground stations use radar to make sure they are actually where we think they are.
A receiver, like you might find in your phone or in your parents car, is constantly listening for a signal from these satellites. The receiver figures out how far away they are from some of them.
Once the receiver calculates its distance from four or more satellites, it knows exactly where you are. Presto! From miles up in space your location on the ground can be determined with incredible precision! They can usually determine where you are within a few yards of your actual location. More high-tech receivers, though, can figure out where you are to within a few inches! (Resource: https://spaceplace.nasa.gov/gps/en/)
2. How accurate are GPS?
The United States government currently claims 4 meter RMS (7.8 meter 95% Confidence Interval) horizontal accuracy for civilian (SPS) GPS. Vertical accuracy is worse. Mind you, that's the minimum. Some devices/locations reliably (95% of the time or better) can get 3 meter accuracy. (Resource: https://gis.stackexchange.com/questions/43617/what-is-the-maximum-theoretical-accuracy-of-gps)
Yvonne J. 801
Research Questions. 1~Explain how a global positioning system (GPS) works? GPS Works when at least 4 GPS satellites are visible at anytime.Each one transmits information about its position and the current time at regular intervals. These signals traveling at the speed of light are intercepted by your GPS receiver. 2~How accurate are GPS? Some GPS receivers say that today's GPS is very accurate thanks to its technology. GPS is accurate about 95% of the time. Laisha R.702
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ReplyDeleteResearch Quetions: 1- Explain how a global positioning system (GPS) works: GPS works when theres at least about 3 to 5 satelittes that are visible at anytime. Each one sends information/coordinates about the position/location of a place. They also can reach to send what street it is on/on what block.
ReplyDeleteResearch Question: 2- How accurate are GPS? Specifications for many GPS receivers indicate their accuracy will be withing about 10 to 50 feet (3 to 15 meters) 95% of the time.
Gabriela M.601
DeleteResearch questions: Explain how a global positioning system (GPS) works:The global positioning system is a system of around 4 or more satellites circling the Earth.GPS basically signals where you are (pinpoints your location).The GPS works 24 hours and in any weather conditions.
ReplyDeleteQuestion 2:How accurate are GPS?: GPS are accurate 95 percent of the time.what you receive from these satellites depend how well its working and etc.
Gennesis F.702
Question 1: "The Global Positioning System (GPS) is a network of about 30 satellites orbiting the Earth at an altitude of 20,000 km... Once it has information on how far away at least three satellites are,your GPS receiver can pinpoint your location using a process called trilateration.
ReplyDeleteQuestion 2: According to "Geographic Information Systems" they say that Global Positioning Systems are to be accurate 95% of the time.