1. Why is sky blue ? 2. How much does the earth wieght ? 3. How far away is the sun from earth ? 4. What is black hole ? 5. How do airplane fly ? 6.How do flies walk on the ceilings ? 7. How are rainbow made ? 8. Are sharks mammals ? 9.Why can I see the moon during the day ? 10. Why do birds fly south fo the winter ??
Answers
Answer:
3.)150.6 million km
1)Blue light is scattered in all directions by the tiny molecules of air in Earth's atmosphere. Blue is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time. ... Also, the surface of Earth has reflected and scattered the light.
2)5.972 × 10^24 kg
5)plane's engines are designed to move it forward at high speed. That makes air flow rapidly over the wings, which throw the air down toward the ground, generating an upward force called lift that overcomes the plane's weight and holds it in the sky.
4)black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.
7)rainbow is formed when light (generally sunlight) passes through water droplets hanging in the atmosphere. ... Some individuals refer to refracted light as “bent light waves.” A rainbow is formed because white light enters the water droplet, where it bends in several different directions.
8)Sharks are not mammals.
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Answer:
1. Blue light is scattered in all directions by the tiny molecules of air in Earth's atmosphere. Blue is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time. ... Also, the surface of Earth has reflected and scattered the light.
2. 6,000,000, 000,000,000,000,000,000
3. 150.6 million km
4. a region of space having a gravitational field so intense that no matter or radiation can escape
5.A plane's engines are designed to move it forward at high speed. That makes air flow rapidly over the wings, which throw the air down toward the ground, generating an upward force called lift that overcomes the plane's weight and holds it in the sky. ... The wings force the air downward and that pushes the plane upward.
6.Flies need sticky feet to walk on ceilings, but not so sticky that they get stuck upside down. So each foot comes with a pair of claws that help hoist the gooey foot off the wall. Flies use several different techniques to get unstuck: pushing, twisting, and peeling its footpads free.
7.A rainbow is a meteorological phenomenon that is caused by reflection, refraction and dispersion of light in water droplets resulting in a spectrum of light appearing in the sky. It takes the form of a multicoloured circular arc. Rainbows caused by sunlight always appear in the section of sky directly opposite the sun.
8.Sharks are not mammals. Rather, they are a species of fish. Sharks have a skeleton that is entirely composed of cartilage and is equipped with leathery, tough and scale less skin. These skeletons differ greatly from those of the bony fish.
9.We can see the moon during the day for the same reason we see the moon at night. The surface of the moon is reflecting the sun's light into our eyes. ... "When we see the moon during the day it's because the moon is in the right spot in the sky and it's reflecting enough light to be as bright, or brighter, than the sky.
10. Many geese and ducks leave the north in winter because the water there freezes, and these birds need open water to survive. Warblers, which eat mostly insects, leave North America and go south to the tropics, because there is no food for them in the north in winter.
Explanation: