2.14 Summing up
This unit is concerned with macroevolution – the patterns and processes of evolution above the species level. A crucial consideration in macroevolutionary studies is that of the evolutionary relationships (phylogeny) of the organisms in question. The unit begins with an introduction to the scope of macroevolutionary studies and illustrates methods of reconstructing phylogeny, from both morphological and molecular data.
In this activity, students explore the importance of charts to navigation on bodies of water. Using one worksheet, students learn to read the major map features found on a real nautical chart. Using another worksheet, students draw their own nautical chart using the symbols and identifying information learned.
Stay in Shape
In this activity, students will learn that math is important in navigation and engineering. Ancient land and sea navigators started with the most basic of navigation equations (Speed x Time = Distance). Today, navigational satellites use equations that take into account the relative effects of space and time. However, even these high-tech wonders cannot be built without pure and simple math concepts — basic geometry and trigonometry — that have been used for thousands of years. In this activ
Students design their own logo or picture and use a handheld GPS receiver to map it out. They write out a word or graphic on a field or playground, walk the path, and log GPS data. The results display their "art" on their GPS receiver screen.
The earliest explorers did not have computers or satellites to help them know their exact location. The most accurate tool developed was the sextant to determine latitude and longitude. In this activity, the sextant is introduced and discussed with the class. Students will learn how a sextant can be a reliable tool that is still being used by today’s navigators and how computers can help assure accuracy when measuring angles. Also, this activity will show how computers can be used to understan
Students will build a wire circuit and pass a paperclip through the maze, trying not to touch the wire. Touching the wire with the paperclip will cause the circuit to close, which will activate the indicator.
Decarteret matches pole vault record at Florida State
The Northeastern women's track & field team recorded 15 top-10 marks, including another record-breaking performance by Jillena Decarteret, amidst stiff competition at this weekend's Florida State Relays in Tallahassee, Fla. Decarteret tied the school record in the pole vault with a winning performance of 4.06m (13'3.75), beating out 20 others for the title. The sophomore's vault matched Laura Chmielewski's mark set back almost seven years ago on May 8, 2004. Decarteret has continued to make upw
Private hiring keeps up in March
Summary of business headlines: U.S. labor market continues recovery in March; Apollo, Qihoo heat up IPO market.
Designing a Winning Guest Village in the Saguaro National Park
The Challenge Question of the Legacy Cycle draws the student into considering the engineering ingenuity of nature. It will force him to analyze, appreciate and understand the wisdom of these designs as the student team focuses on meeting each of the challenge’s requirements. The student is asked, with his team members, to envision a sustainable design for a future guest village within the Saguaro National Park, outside of Tucson, Arizona. What issues need to be addressed to support the comfort
Searching for Bigfoot and Others Like Him
Cryptids, creatures of questionable existence, are used as a source of data to guide students into the creation of their own GIS data layer in Google Earth. The activity will serve the purpose of a tutorial to teach them how to make data layers with a simple subject. They can then use that skill on other topics such as plastics in their neighborhood.
Where are the Plastics Near Me? (Mapping the Data)
Data collected in the Where are the Plastics Near Me (Field Trip) activity are organized by student groups in a fairly student-led and independent fashion to create a useful and informative Google Earth map. The students will create a map, use that map to analyze the results, adjust the map to include the results of the analysis, and then write a brief summary of their findings. Questions of fate-and-transport of plastics are primarily what are explored. If data was gathered in the field trip bu
What's Wrong with the Coordinates at the North Pole?
Students will complete a self-guided exercise in worksheet format combined with Google Earth that will help them explore practical and observable differences between different projection and coordinate systems. The activity will also increase their skill level at using various features of Google Earth.
Fluid Power Basics
Students learn about the basic fundamental concepts regarding fluid power, which includes both pneumatic, which utilize gas, and hydraulic, which utilize liquid, systems. Both systems contain four basic components: a reservoir, a pump or compressor, a valve, and a cylinder. Using the Portable Fluid Power Demonstrator (PFPD), students learn about the properties of gases and liquids in addition to how forces are transmitted and multiplied within these systems.
Pointing at Maximum Power for PV
Student teams measure voltage and current in order to determine the power output of a photovoltaic (PV) panel. They vary the resistance in a simple circuit connected to the panel to demonstrate the effects on voltage, current, and power output. After collecting data, they calculate power for each resistance setting, creating a graph of current vs. voltage, and indentifying the maximum power point.
This lab demonstrates Hooke’s Law with the use of springs and masses. The students attempt to determine the proportionality constant, or k-value, for a spring. The students do this by calculating the change in length of the spring as different masses are added to it. The concept of a springs elastic limit is also introduced, and the students must test to makes sure the spring’s elastic limit has not be reached during their tests in the lab. After compiling all of their data, they attempt to
Applications of Linear Functions
This lesson culminates the unit with the Go Public phase of the legacy cycle. In the associated activities, students will use linear models to depict Hooke’s law as well as Ohm’s law. To conclude the lesson, students must apply they’ve learned throughout the unit to answer the grand challenge question in a writing assignment.
Design Step 2: Research the Problem
Through Internet research, patent research, standards and codes research, user interviews (if possible) and other techniques (idea web, reverse engineering), students further develop the context for their design challenge. In subsequent activities, the design teams use this body of knowledge about the problem to generate product design ideas. (Note: Conduct this activity in the context of a design project that students are working on, which could be a challenge determined by the teacher, brainst
Designing Medical Devices for the Ear
Students are introduced to engineering, and more specifically, to biomedical engineering and the engineering design process through a short lecture and interactive, hands-on activity (approximately 30 minutes long), where students design their own medical device for retrieving foreign bodies from the ear canal. In this lesson, the teacher first reviews the basics of ear anatomy then discusses how ear infections occur and how they are treated. Following antibiotic treatment, the most common treat
Engineer a Coin Sorter
Students learn about the engineering design process and how it is used to engineer products for everyday use. Students individually brainstorm solutions for sorting coins and draw at least two design ideas. They work in small groups to combine ideas and build a coin sorter using common construction materials such as cardboard, tape, straws and fabric. Students test their coin sorters, make revisions and suggest ways to improve their designs. By designing, building, testing and improving coin sor