What is the impact of desertification? Desertification affects topsoil, groundwater reserves, surface runoff, human, animal, and plant populations. Water scarcity in drylands limits the production of wood, crops, forage, and other services that ecosystems provide to our community. How can you prevent erosion? You can reduce soil erosion by: Maintaining a healthy, perennial plant cover. […]
How are rock paintings dated?
How are rock paintings dated? The most common example of this form of absolute chronology, which we can use with rock paintings, is radiocarbon dating. If we can use that technique it can give a reasonably accurate age up to approximately 50,000 BCE (Before Common Era similar to BC, Before Christ). Can rock art be […]
How did calculus change the world?
How did calculus change the world? He found that by using calculus, he could explain how planets moved and why the orbits of planets are in an ellipse. This is one of Newton’s break throughs: that the gravitational force that holds us to the ground is the same force that causes the planets to orbit […]
What are the types of visual media?
What are the types of visual media? Types of visual media include digital and printed images, photography, graphic design, fashion, videos, architectural structures and fine arts. Visual media is seen on billboards, smartphones, newspapers, screen projectors, posters, televisions, computers and various other mediums and devices. What would be the best type of visual aid for […]
Which is the most preferred use of roller bearing?
Which is the most preferred use of roller bearing? Rolling-element bearings are often used for axles due to their low rolling friction. For light loads, such as bicycles, ball bearings are often used. For heavy loads and where the loads can greatly change during cornering, such as cars and trucks, tapered rolling bearings are used. […]
What is the disadvantage of refracting telescopes?
What is the disadvantage of refracting telescopes? Disadvantages. All refractors suffer from an effect called chromatic aberration (“color deviation or distortion”) that produces a rainbow of colors around the image. This is why the early refracting telescopes were made very long. What is the best size telescope for viewing planets? The larger the diameter, the […]
Why is it important to know the use of laboratory tools and equipment give at least two reasons?
Are gold bars a good investment?
Are gold bars a good investment? Although the price of gold can be volatile in the short term, it has always maintained its value over the long term. Through the years, it has served as a hedge against inflation and the erosion of major currencies, and thus is an investment well worth considering. What is […]
What is the function of the sodium potassium pump in nerve cells?
What is the function of the sodium potassium pump in nerve cells? It acts to transport sodium and potassium ions across the cell membrane in a ratio of 3 sodium ions out for every 2 potassium ions brought in. In the process, the pump helps to stabilize membrane potential, and thus is essential in creating […]
Why do compasses not point south?
Why do compasses not point south? A magnetic compass does not point to the geographic north pole. A magnetic compass points to the earth’s magnetic poles, which are not the same as earth’s geographic poles. This fact means that the north end of a magnet in a compass is attracted to the south magnetic pole, […]