Newsletter 84 - Our amazing earth.

Our amazing earth.

(My thanks to David Goodwin of Kidsreach - ( www.kidsreach.org.nz ) for providing the illustrations for this presentation)

God created the earth as it is for the benefit of His 'Special Creation' - us! We are to enjoy it and look after it (including everything that God has created on it, such as the animals) on His behalf.

God made the earth just right for us to live on. Even very small changes in the earth's conditions would make life, as we know it, impossible.

God's Creation is proof of the Work of a Creator!

God is very good

Consider the following nine facts - - - -

1. The earth is about 150 million kilometres from the sun. This is exactly the right distance to hold the temperature between 0 degrees C. and 40 degrees C. on most of the earth. This is the temperature needed to sustain most life. But if the earth were just 5% closer to the sun, not only would it be too hot for us, but the oceans would boil and the water would all evaporate. It has been calculated that even a 2 degree C. rise in the average surface temperature of the earth would be enough to melt the polar ice caps and cause devastating flooding). If the earth were only 5% further away from the sun, the oceans would freeze, making life in them and transport on them impossible.

2. The earth's orbit around the sun is nearly a perfect circle. If, as in the case of most other planets, the orbit were oval shaped (like an egg), the earth would be blazing hot as it approached the sun, and deathly cold as it moved away from it.

3. The earth rotates once on its axis every 24 hours. If it didn't rotate, one side would be day all the time and be very hot, and the other would be night all the time and be very cold. If the earth's speed of rotation were much slower than it is, our days would still be very hot, and our nights very cold. If the rotation were much faster, the wind would blow so strongly that we wouldn't be able to stand up in the open. The length of each day and night is also just right for the amount of sleep we need.

4. The earth is tilted on its axis by about 23 degrees. If it wasn't tilted this way, we would have no seasons. Countries near the equator would be very hot. Those far from the equator would be too cold to grow food - resulting in a world-wide food shortage.

5. The diameter of the earth is about 13,000 Kilometres. If it were only about 10% less than this then, because of the consequent reduction in gravity, most of the oxygen which we need to breathe would escape into outer space. If the diameter of the earth were 10% greater than at present, the increased gravity, and hence air pressure, would cause the polar ice caps to melt - resulting in devastating flooding.

6. Our atmosphere contains about 21% oxygen, which is just right for life on earth. A much higher level would make the planet highly inflammable, but at a much lower level, fire would not burn at all. And we would find it very hard to breathe!

Another type of oxygen is ozone. This forms a layer in our atmosphere which absorbs the very harmful ultraviolet light from the sun and prevents it reaching us on the earth. The problem with ozone is that it is poisonous. So where to we find this ozone layer? About 15 kilometres above the earth's surface, where it can do us no harm.

7. The pull of gravity on the earth by the moon and the sun causes the tides. Tides cleanse the ocean's shores, help put oxygen (that fish breathe) into the water, and help keep the ocean currents moving, preventing the sea from becoming stagnant. If the moon were a little smaller or a little further away than at present, there would be very little tidal action, resulting in even the oceans becoming stagnant and the death of all aquatic creatures. If the moon were a little larger or a little nearer than at present, the tidal action would be too severe, with low lying areas being flooded twice a day!

8. Unlike the earth, the moon doesn't rotate about its axis. This means that the same side of the moon always faces the earth. This side is made up of mostly dark dust, and so it only reflects about 7% of its sunlight to the earth. The other side of the moon is extremely rocky, and therefore very reflective. If this side faced the earth, our nights would be almost as bright as our days, thus making sleeping very difficult.

9. Although we don't know the purpose of all the planets in the solar system, we do know that the two largest, Jupiter (318 times the size of the earth) and Saturn (95 times the size of the earth), with their strong gravities, are in just the right positions to pull many comets and meteors away and prevent them crashing into the earth and killing us all.

What a wonderful Creator we have, who not only made the earth just right for us to inhabit, but He also keeps it that way year, after year, after year.

"God's eternal power and divine nature can be seen from the things He has made." (Romans 1.20).