When did the oxygen cycle start? around 4.6 billion years ago According to the earth’s history, oxygen gas was first introduced by cyanobacteria through the process of photosynthesis. Earlier, around 4.6 billion years ago, there was no life on planet earth because the atmosphere was devoid of oxygen. How has the carbon cycle changed over […]
Why is the human body considered an ecosystem?
Why is the human body considered an ecosystem? The human body is also an ecosystem. There are trillions tiny organisms living in and on it. These organisms are known as microbes and include bacteria, viruses, and fungi. Because of this, you are a unique ecosystem. Is there an ecosystem inside the Earth? Scientists identify vast […]
What is the most important organism in a food chain or a food web?
What is the most important organism in a food chain or a food web? Definition of Trophic Levels A trophic level is a step in the food chain that each organism occupies. In a simple food chain, it is easy to see the trophic pyramid. At the base of the food chain are the producers, […]
What is a break in the crust along which movement in an earthquake has occurred?
What is a break in the crust along which movement in an earthquake has occurred? A fault is a break in the Earth’s crust along which blocks of the crust slide relative to one another. Is a break in the lithosphere along which movement has occurred? Slide 1. An earthquake is a shaking of the […]
What comes first sound or shock wave?
What comes first sound or shock wave? In particular, shock waves travel faster than sound, and their speed increases as the amplitude is raised; but the intensity of a shock wave also decreases faster than does that of a sound wave, because some of the energy of the shock wave is expended to heat the […]
Which state is the Bahamas closest to?
Which state is the Bahamas closest to? The Bahamas is a country in the northwestern West Indies, located 80 km (50 mi) south-east of the coast of Florida (USA) and north of Cuba. The Caribbean islands group consists of around 700 islands and islets, and more than 2,000 cays (coral reefs). Only about 30 islands […]
How long is a flight to Holland?
How long is a flight to Holland? Flying time from United States to Netherlands The total flight duration from United States to Netherlands is 9 hours, 51 minutes. If you’re planning a trip, remember to add more time for the plane to taxi between the gate and the airport runway. This measurement is only for […]
How is sonar used to measure distances underwater?
How is sonar used to measure distances underwater? Ships using technology called sonar, which stands for sound navigation and ranging, can map the topography of the ocean floor. The device sends sound waves to the bottom of the ocean and measures how long it takes for an echo to return. How does the sonar measure […]
Can you measure distance on Google Street View?
Can you measure distance on Google Street View? Using the Streetview Ruler tool to measure distance: Click on the Street View ruler icon in the bottom left-hand corner of your design window. To measure the distance from one point to another, place 2 nodes in design view at each end of the distance you want […]