Questions why is the sky blue

And that is why the sky looks blue. The answer has two parts. First, the Sun makes more blue light than violet light. Second, our eyes see blue light better than violet light. For these reasons, a sunny sky looks blue rather than violet. The Sun is a star of many colors.

But it takes more than just sunlight to color the sky blue. The sky is blue because of the same air that keeps you alive and able to see the beauty of a sunny day. View our Privacy Policy and Terms and Conditions. The light bulb icon represents curiosity.

For content about raising a curious child, look for this icon. Related Articles and Activities. The different colors, or wavelengths, of light are scattered by these collisions by different amounts. Blue light, which has a shorter wavelength, is scattered more than red light, which has a longer wavelength. You could say the blue butter gets spread so thin, you can now mostly see your attempts with the red butter.

Stock images. Do you have a Good Question about anything? More violet light actually gets scattered by atmospheric particles than blue light, but your eyes are more sensitive to blue, so the sky appears blue. Sunsets are orange-red because in the evening, with the sun low on the horizon, sunlight must pass through more atmosphere to get to your eyes, and only the red light can make it all the way through.

The shorter wavelengths have all been scattered toward the ground in the part of Earth where it is still daytime. No one knows how rare alien life is in the universe, so there's no telling whether humanity will ever manage to discover it.

However, scientists at the SETI Institute in California, who are engaged in the search for extraterrestrial intelligence, are hopeful that they'll detect alien signals within the next 20 years.

The scientists scan the night sky looking for unnatural radio or light beams — ones that could only emanate from an intelligent civilization. Their year estimate is based on the rapid pace with which astronomers are discovering planets beyond our solar system , including planets that seem suitable for life; it is also based on the assumption that, if there are intelligent beings out there, they, too, will seek contact with others, and will make their presence known by sending signals into space.

The first approach to answering this question is to get technical about it. Because the Earth is in free fall around the sun, it actually weighs nothing. The same goes for astronauts in orbit; because they are technically falling around the Earth — and if they stood on a scale, it, too, would be falling — the scale would read zero.

Add any extra items to your drawing such as wavy arrows that you think are needed to help with your explanation. Extension Can you find out the answer to any of these similar questions? Highlight them in yellow and then make a list of them all down your page.

Now see if you and your partner can come up with a synonym for the chosen verb. Make sure it still makes sense in the context it was taken from. Try to replace some of the original verbs with your synonyms and discuss if any are better and why. If you use mnemonics for remembering things, you could share those here too.