Photosynthesis: Chemical process by which plants containing chlorophyll use sunlight to manufacture their own food by converting carbon dioxide and water to carbohydrates, releasing oxygen as a by-product. Respiration: The process in which oxygen is used to break down organic compounds into carbon dioxide and water.
The Perseid meteor shower, one of the brighter meteor showers of the year, occurs every year between July 17 and August 24. The shower tends to peak around August 9-13. The best time to view the Perseids, and most other meteor showers, is when the sky is the darkest.
Meteor Showers are named for the constellation out of which they seem to come. Because all of the particles are moving in roughly the same direction, the meteors which strike our atmosphere all âpointâ back to the direction of the cometâs path. This point in the sky is called the Meteor Shower Radiant. The Perseids appear to come from a point next to the constellation of Perseus. Perseids can be seen anywhere in the sky, but the direction of motion, when traced back, will point to a point next to the Perseus constellation.