The principles of aeronautics for elementary and middle school children, presented in three levels in English and Spanish for beginning, intermediate, and advanced students. Curriculum Bridges provides activities that show the relationships between aeronautics and math, language arts, social studies, visual/performing arts, and literature. Includes a basic Internet tutorial, lesson plans, an animated sign language dictionary, the Wright brothers, descriptions of careers, and Tennis Science.
Category: Science
Sir Isaac Netwotn’s three laws of motion. Three states of matter (solid, liquid, gas). We live on the third rock from the sun. Our metric system of measurement uses metre, litre, and gram. Morse code is a reliable system as the signal is made up of only three parts – a long ‘on’, the dash; a short ‘on’, the dot; and an ‘off’ signal. Do you know what SOS means in Morse code?
Lithium – Periodic Table – element 3
Lithium is a Group 1 (IA) element containing just a single valence electron (1s22s1). Group 1 elements are called "alkali metals". Lithium is a solid only about half as dense as water. A freshly cut chunk of lithium is silvery, but tarnishes in a minute or so in air to give a grey surface.
Kepler’s Three Laws of Planetary Motion
The laws were formulated between 1609 to 16l9, and are (as usually stated):
<ul> <li> Planets move around the Sun in <strong>ellipses</strong>, with the Sun at one focus </li> <li> The line connecting the Sun to a planet sweeps <strong>equal areas in equal times. </strong></li> <li> The<strong> square</strong> of the orbital period of a planet is proportional to the <strong> cube</strong> (3rd power) of the mean distance from the Sun in (or in other words--of the"semi-major axis" of the ellipse, half the sum of smallest and greatest distance from the Sun) </li> </ul> <ol> </ol> <!--more--> <a href="http://www-spof.gsfc.nasa.gov/stargaze/Kep3laws.htm" target="_blank" rel="noopener noreferrer">Read more . . .</a><br />
