kites

Watching a kite soar high on the wind is a magical site. Here are the directions on how to make a kite and harness the power of the wind. To make a kite you need: a green or white garbage bag about 7 meters of string some duct tape 2 sticks, on 90 cm, the other 75 cm kite string (can be bought at a hardware store) Directions: Make a cross with the two sticks. Put the shorter stick 18 cm from the top of the longer stick and lash where they meet together with string. Make a string diamond … Continue reading kites

bottle garden

Create your own contained ecosystem by making a garden in a jar. A bottle garden needs very little water or air as it is self-sustaining. To make a bottle garden you need: a large jar with a lid pebbles dry potting soil two long sticks some plants – begonias, maidenhair ferns and zebra leaf plants all work well Directions: Put the clean pebbles into the bottom of the jar. This allows any water to drain away. Cover the pebbles with about 8 cm of potting soil. Make a hole for each plant with a stick. Lower the plants into the … Continue reading bottle garden

Katharine Burr Blodgett

Katherine Burr Blodgett (1898-1979) Katharine Burr Blodgett was the first woman to be awarded a Ph.D. in physics from the University of Cambridge, in 1926. After receiving her master’s degree, she was hired by General Electric, where she invented low-reflectance “invisible” glass. Once introduced, nonreflective lenses were used for projectors and cameras by the post-war movie industry. Blodgett’s glass was also used for submarine periscopes and airplane spy cameras during World War II. Continue reading Katharine Burr Blodgett

gasoline engine

Gasoline engine Gasoline engine and car Gasoline engine – internal combustion engine which is often used for automobiles, aircraft, small mobile vehicles such as lawnmowers or motorcycles, and outboard motors for boats. The most common engine of this type is a four-stroke cycle internal combustion engine that burns gasoline. Burning is initiated by an ignition system that fires a high voltage spark through a spark plug. Car Engines – Explained (video 6:00) – How engines work. What is an internal combustion engine? This video is the perfect introduction into learning about how cars work, starting with the most important part, … Continue reading gasoline engine