What was life like during the Paleozoic Era? By the end of the Paleozoic, cycads, glossopterids, primitive conifers, and ferns were spreading across the landscape. The Permian extinction, 244 million years ago, devastated the marine biota: tabulate and rugose corals, blastoid echinoderms, graptolites, and most crinoids died out, as did the last of the trilobites. […]
What size is a photon?
What size is a photon? In this way you could say the “size” of photon is basically the width of its wavelength. The wavelength of green light is about 500 nanometers, or two thousandths of a millimeter. The typical wavelength of a microwave oven is about 12 centimeters, which is larger than a baseball. How […]
What are the 5 factors that influence physical fitness?
What are the 5 factors that influence physical fitness? 10 Physical Fitness Factors to Assess How Fit Are You Body composition. This basically refers to the relative level of muscle, fat, bones, and other vital elements of the body. Cardiovascular fitness levels. Flexibility. Speed. Power. Coordination. Balance. Agility. What are 3 factors that affect skill-related […]
What is physical process and chemical process?
What is physical process and chemical process? There is no real difference between a chemical process and a physical process in chemistry. According to such teachers, things like burning fuels are chemical processes and things like dissolving salt in water or freezing water into ice are physical processes. What are the physical features of Earth? […]
Is it a phrase or a clause?
Can be drawn into thin wires?
Can be drawn into thin wires? ductile: A material that can be drawn into wires. malleable: Means that the material can be hammered into very thin sheets without breaking. metal: An element that is a good conductor of heat and electricity. What are the two properties that make metals a good choice to use as […]
What is the advantage of main switch?
What is the advantage of main switch? The major advantage of using a main switch is that it can break the connection of both, the live and the neutral wire at the same time. This protects electrical appliances from accidental damage due to electrical faults. Why do live wires connect to switches? The switch must […]
Why do my ears hurt when I swim?
Why do my ears hurt when I swim? Swimmers ear, also known as otitis externa, occurs when the canal that joins your eardrum to the external ear becomes inflamed. This inflammation is caused by moisture, such as water and bacteria, getting trapped in the ear canal. How do I unclog my eustachian tube? You may […]
What are the organelles of cell?
What are the organelles of cell? An organelle is a subcellular structure that has one or more specific jobs to perform in the cell, much like an organ does in the body. Among the more important cell organelles are the nuclei, which store genetic information; mitochondria, which produce chemical energy; and ribosomes, which assemble proteins. […]
Where are tides the strongest?
Where are tides the strongest? The highest tide in the world is in Canada. The highest tides in the world can be found in Canada at the Bay of Fundy, which separates New Brunswick from Nova Scotia. The highest tides in the United States can be found near Anchorage, Alaska, with tidal ranges up to […]