Why is the sky blue and the grass green?

Answer 1

The blue sky is the reflection of the water into the atmosphere - the green grass is due to the chlorophyll (haahaha - brain freeze there sorry) content in it. It's green.

Answer 2

The sky is blue because of a process called Rayleigh scattering which has a strong wavelength dependence and so scatters short wavelengths such as blue and violet more than long wavelengths such as red.

This on it's own would tend to lead to a purple coloured sky but the output of the sun peaks in the green part of the spectrum and human eyes have less sensitivity in the violet than in the blue which causes the blue to be apparent.

Some people including some people who answered this question incorrectly think that the sky is blue because of dust scattering the light, this is not so, the light is scattered by the air molecules in the atmosphere (mostly Nitrogen and Oxygen).

Plants are Green because they contain Chlorophyll (the green chemical which is responsible for photosynthesis).

Answer 3

WHY IS THE SKY BLUE?

The blue color of the sky is due to Rayleigh scattering. As light moves through the atmosphere, most of the longer wavelengths pass straight through. Little of the red, orange and yellow light is affected by the air.

However, much of the shorter wavelength light is absorbed by the gas molecules. The absorbed blue light is then radiated in different directions. It gets scattered all around the sky. Whichever direction you look, some of this scattered blue light reaches you. Since you see the blue light from everywhere overhead, the sky looks blue.

As you look closer to the horizon, the sky appears much paler in color. To reach you, the scattered blue light must pass through more air. Some of it gets scattered away again in other directions. Less blue light reaches your eyes. The color of the sky near the horizon appears paler or white.

WHY IS THE GRASS GREEN?

Grass and most other plants are green because they contain a pigment
known as chlorophyll. The chlorophyll is used in the process of
photosynthesis where a plant produces sugar in the presence of
sunlight. In fact the word 'photosynthesis' means literally to
synthesize or 'make' from light (photo). There are, of course some
plants which do not contain chlorophyll, and these generally get their
nutrition (food) by other means. Some examples are the fungi which
decompose dead, and sometimes living, tissue, for their food.
You will find that a green plant needs light to make food. If the
source of light is cut off, the plant dies. Mushrooms, which are
fungi, do not require light to make food (they decompose matter
as I mentioned above) and you can find mushrooms growing in almost
total darkness.

Answer 4

Sunlight is made of light of all colors. When light passes through Earth's atmosphere, it gets scattered by the air. How much light is scattered depends on wavelength. The shorter the wavelength, the greater is the amount of scattering.

Red light has a long wavelength and therefore tends to travel in straight lines. The red light from the sun tends to be seen in-or-near the sun itself.

Blue light has a short wavelength and therefore it gets scattered more than the red light does. The blue light component of the sun's radiation bounces around in the air, so that it seems to be coming at you from all parts of the sky.

When the sun is rising or setting, the light from it must travel though more air to reach your eye, which means that more of the blue stuff is scattered away from that direction, leaving only the red and orange. That is why sunrises and sunsets tend to have reddish colors.

The technical term for this effect is "Thompson scattering."

Grass and other plants are green because they make their food from sunlight, water, carbon dioxide, and chemicals in the soil, using a catalyst called chlorophyll. The chlorophyll absorbs most of the sun's light to provide energy for the synthesis of plant food. However the chlorophyll molecule cannot absorb the green part of the spectrum, so the green light is reflected off the plant surface and into your eyes.

Answer 5

The sky is blue because of our atmosphere bending the blue in white light away. Its not actually blue it just appears blue. The grass is green because of clorophyll, it does the same thing. It absorbs light and we see green out of it. The grass isn't actually green either, like when trees change color because they lose their clorophyll

Answer 6

Sky is blue b/c the sun reflects of the atmosphere and the grass is green b/c of photosynthesis

Answer 7

I think the sky is blue because of the way light is deflected by the gases in the o-zone. Grass is green because of the chemical clorophyl in it.

Answer 8

Í'm not sure for the sky but i heard that all plants including grass have chloroplast which contais chlorophyll that makes plants look green

Answer 9

At night, the sky is generally black.

Answer 10

I dont know....why does the garbage man pick up my garbage every Tues. and Fri. in my neighborhood? That's just the way it is.