For no 1..
becouse it is natural colour
3= Best Answer: As Wacky says pure instinct, they don't learn it from their parents how could they? They never witness their parents building a nest because when they hatch they are already in a nest that has been build previously then they leave the nest and fend for themselves totally.
4= Best Answer: As summer ends and autumn comes, the days get shorter and shorter. This is how the trees "know" to begin getting ready for winter.
5=sory don know..
6= Best Answer: The scientific name for the twinkling of stars is stellar scintillation (or astronomical scintillation). Stars twinkle when we see them from the Earth's surface because we are viewing them through thick layers of turbulent (moving) air in the Earth's atmosphere.
8= Best Answer: Light is made up of all of the different colours you see in a rainbow. However, you can't see the colours until something bends the light. That's why you see pretty sunrises and sunsets. The sunlight hits the atmosphere (air) at an angle and the stuff in the atmosphere and bends the light to create the different colours.
9=a giant soft fluffy cotton ball that's so comfy and warm[im not sure bout this.]
10=yes i do..hahahahaahhh