Category: Physics

Are xenoliths rare? Xenoliths can be a piece of rock trapped in a piece of sedimentary rock, but this is rare. Xenoliths have also been found in meteorites, or rocks from outer space that have crashed into Earth. What Xenolith means? A xenolith (“foreign rock”) is a rock fragment that becomes enveloped in a larger […]

What three things help a bird to fly? A bird has wings which helps it to fly. Bird’s wings have feathers and strong muscles attached to them. With the help of their strong arm and chest muscles, birds flap their wings and fly. The bodies of birds are very light which help them to fly […]

What is meant by a positive feedback loop? Positive feedback loops enhance or amplify changes; this tends to move a system away from its equilibrium state and make it more unstable. Negative feedbacks tend to dampen or buffer changes; this tends to hold a system to some equilibrium state making it more stable. What are […]

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What is the importance of water cycle for Class 6? Water cycle is important because of the following reasons: (1) Water cycle makes fresh water available in the form of rain: The sea-water is highly salty which is not fit for drinking by animals or for the growth of plants. But the rain water is […]

What do you call the highest of a wave? The highest surface part of a wave is called the crest, and the lowest part is the trough. The vertical distance between the crest and the trough is the wave height. The horizontal distance between two adjacent crests or troughs is known as the wavelength. What […]

What is the octet rule of covalent bonding? The Octet Rule requires all atoms in a molecule to have 8 valence electrons–either by sharing, losing or gaining electrons–to become stable. For Covalent bonds, atoms tend to share their electrons with each other to satisfy the Octet Rule. Which type of bond is formed when two […]

How does Venn diagram help you identify the similarities and differences of the given sets? A Venn diagram is an illustration that uses circles to show the relationships among things or finite groups of things. Circles that overlap have a commonality while circles that do not overlap do not share those traits. Venn diagrams help […]

Is elevation based on sea level? Sea level is the base level for measuring elevation and depth on Earth. Because the ocean is one continuous body of water, its surface tends to seek the same level throughout the world. Just like the ocean, the elevation of land may rise and fall over time. How do […]

What is solar wind caused by? The solar wind is created by the outward expansion of plasma (a collection of charged particles) from the Sun’s corona (outermost atmosphere). This plasma is continually heated to the point that the Sun’s gravity can’t hold it down. It then travels along the Sun’s magnetic field lines that extend […]