PV Gap

Ella Said:

BEARDED DRAGON (S) lights...temps and fighting...?

We Answered:

How big is your tank? For two dragons, you need at least a 40 gallon breeder tank. If one is larger than the other, they may very well fight.

In order for the UVB light to be affective, you need to provide a lot of additional calcium to their diet (put calcium dust on all their food) and provide a means for the dragons to get within 6-10 inches of the lighting to properly metabolize. Usually a 10.0 reptisun is recommended for a strip light UV source. I personally use Mercury Vapor Bulbs (MVB) to provide heat and UV light in a single source.

Try feeding them crickets as well as constant source of salad.

Do not use sand or any other loose granular substrate. Do not provide a deep water dish as dragons get their moisture from the foods they eat and via a weekly soak in warm water. If the weather is nice, you might take them outside and let them enjoy some natural sunlight. The real thing is ten times better than any lighting system you can buy. :)

Frederick Said:

Entryway for my yard--flowers/rocks & cedar or pampas grass? Please help!?

We Answered:

The pampas grass will get very tall, are you sure that you want to hide your rocks? While I like the look that you're after, you might want to get the height from something like a rose-of-sharon that will give you height, color, and texture but still see the rocks. Good luck!

Anita Said:

Which of the following explains the rocky nature of the inner planets?

We Answered:

>Only the rocky material could condense at the higher temperatures of the inner part of the solar nebula.

Here is what happened:

When the Sun became a star, 4.6 billion years ago, a disk of gas and dust was left, containing about 1% of the mass of the Sun. In the inner part of the disk it was still so hot that molecules like water, ammonia and methane tended to stay as gases and did not produce grains and clumps and so on. And because they stayed in gas form the radiation pressure from the Sun and the solar wind pushed them outwards.

Beyond the orbit of Jupiter it becomes cold enough for ice to form. The gaseous molecules can produce grains and lumps so there's a lot of this less dense material around to accrete into planets. Jupiter and Saturn grew large enough to pull in great quantities of hydrogen and helium from the solar nebula.

The inner planets accreted from grains containing heavier atoms like oxygen and aluminium and silicon as well as iron and nickel and so on.

Consequently inside the ice limit at 5 AU only small, dense planets have formed, while outside there is matter enough to form the gas giants.

Ivan Said:

why cant we get to other SOLAR SYSTEMS?

We Answered:

The problem is that you've leaped over huge problems in a single bound without any consideration for what it entails:

if we launched a ship using the suns direct energy to power it at sent it at the near speed of light...

Just how are we supposed to do _that_, precisely?

Catherine Said:

Why are the inner planets made of denser materials than the outer planets?

We Answered:

C) is the correct answer.
In the inner nebula the Sun heats up the disk matter to about 1,500 Kelvin.

This means that in the inner solar system molecules like water, ammonia and methane tend to stay as gases and not produce grains and clumps and so on. And because they stay in gas form the radiation pressure from the Sun and the solar wind will push them outwards.

Around the orbit of Jupiter is becomes cold enough for ice to form. The gaseous molecules can produce grains and lumps so there's a lot of this less dense material around to accrete into planets. Jupiter and Saturn grew large enough to pull in great quantities of hydrogen and helium from the solar nebula.

The inner planets accreted from grains containing heavier atoms like oxygen and aluminium and silicon as well as iron and nickel and so on.