Why is water the key to life? Water is the key to life — every system in our body depends on it. Water helps carry nutrients to our cells, helps rid toxins from our organs, and keeps our nose, ears, and throat moist. If we don’t drink enough water, we become dehydrated. Water comes from […]

What are the 3 types of celestial objects? Classification of Celestial Bodies Stars. Stars are giant balls of hot gases that can produce their own light. Planets. Planets are large (almost) spherical objects that revolve around the sun. Satellites. Satellites are objects that revolve around planets. Comets. Asteroids. Meteors and meteorites. Galaxies. What are the […]

Why is scientific research necessary? Scientific research is a critical tool for successfully navigating our complex world. In contrast to other methods that people use to understand the behavior of others, such as intuition and personal experience, the hallmark of scientific research is that there is evidence to support a claim. Does scientist do research? […]

Why are cells always microscopic? Why are cells so small? Cells are so small that you need a microscope to examine them. Unfortunately, the volume increases more rapidly than does the surface area, and so the relative amount of surface area available to pass materials to a unit volume of the cell steadily decreases. What […]

How are greenhouse gases increasing? Human activities are responsible for almost all of the increase in greenhouse gases in the atmosphere over the last 150 years. The largest source of greenhouse gas emissions from human activities in the United States is from burning fossil fuels for electricity, heat, and transportation. How have carbon emissions changed […]

What is most commonly believed to be the mechanism of driving force behind evolution? What were Darwins ideas concerning evolution? What is the most commonly believed mechanism-or driving force-behind evolution? Genetic mutations with natural selection. Which scientists came up with the hypothesis that life formed gradually from nonliving materials over a long period of time? […]

How do you find the mass of a liquid? To measure the density of a liquid you do the same thing you would for a solid. Mass the fluid, find its volume, and divide mass by volume. To mass the fluid, weigh it in a container, pour it out, weigh the empty container, and subtract […]

What is the best approximation of pi? We all know that 22/7 is a very good approximation to pi. But this well-known fraction is is actually 1/791 larger than a slightly less-well-known but much more mysterious rational approximation for pi: . The fraction 355/113 is incredibly close to pi, within a third of a millionth […]

What is the role of DNA in meiosis? Specifically, meiosis creates new combinations of genetic material in each of the four daughter cells. These new combinations result from the exchange of DNA between paired chromosomes. Such exchange means that the gametes produced through meiosis exhibit an amazing range of genetic variation. What is DNA called […]

What are the stages of conducting a research study? Depending on your familiarity with the topic and the challenges you encounter along the way, you may need to rearrange these steps. Step 1: Identify and develop your topic. Step 2 : Do a preliminary search for information. Step 3: Locate materials. Step 4: Evaluate your […]