PV Gap

Michelle Said:

Telescope help for 9 year old!!!?

We Answered:

For a 9 year old the Celestron Firstscope is probably a good bet.

Francisco Said:

What are those black hoses on the roof called, the ones that make warm water?

We Answered:

Passive solar hot water heater. You can make it yourself.

Ronald Said:

what are ten important event in earth's development?

We Answered:

1) Life produces an atmosphere of oxygen.
2) A Mars-sized planet strikes the Earth and produces a larger Earth and the Moon.
3) India slides northward on its plate and rams into Asia, causing the Himalayan mountains to form.
4) Uplift in the southwest US allowed the Colorado river to carve out the Grand Canyon.
5) Ice ages form the Great Lakes in central North America.
6) The Black Sea basin was flooded about 8000 years ago when the strip of land separating it from the Mediterranean Sea.
7) Bombardment of early Earth by asteroids and comets increased the size of the planet and brought numerous compounds and water to the Earth.
8) Subduction of the Pacific ocean as South America moves westward forms the Andes mountains.
9) Massive volcanic eruptions in India and western US cause major extinctions of life.
10) Isolation of Australian continent from the rest of the world's land masses allowed the development and survival of numerous life forms found nowhere else.