6questions:

what percentage of the earth is covered by water?

did dinosaurs and humans ever exist at the same time?

what is darwin's theory of the origin of species?

why is the sky blue?

what causes a rainbow?

why does a year consist of 365 days and a day of 24 hours?

For question 1: What percentage of the earth is covered by water?

Your answer for question 1: About 71 percent of the earth's surface is covered by water.

For Question 2: Did dinosaurs and humans ever exist at the same time?

Your answer for question 2: No. Dinosaurs went extinct at the end of the Cretaceous period, 65 million years ago. Modern humans did not appear until around 200,000 years ago.

For question 3: What is Darwin's theory of the origin of species?

Your answer for question 3: Darwin's theory of species origination says that natural selection chooses organisms that possess variable and heritable traits and that are best suited for their environments.

For question 4: Why is the sky blue?

Your answer for question 4:
Solar radiation sunlight is scattered across the atmosphere by a process called diffused sky radiation. The sky is blue because much more short-wave radiation, blue light, is scattered across the sky than long-wave radiation, red light.

For question 5: What causes a rainbow?

Your answer for question 5: Rainbows can be seen when there are water droplets in the air and the sun is shining. Sunlight, which contains all colors, is refracted, or bent, off the droplets at different angles, splitting into its different colors of red, orange, yellow, green, blue, indigo and violet.

For question 6: Why does a year consist of 365 days and a day of 24 hours?

Your answer for question 6: A year, 365 days, is the time it takes for the Earth to travel around the Sun. A day, 24 hours, is the time it takes for the Earth to spin around once on its axis.

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