Fossil's are allways found beneath the surface. Which sugest's to me that the mass of Earth is growing over millions of years. Being added to by dust particles and meteorites, etc. This must have an effect on gravity, these great dinosaurs would have found it easy to move about then, but now would the atmosphere be to dense for them to survive.
2006-12-06 09:10:34 · 4 answers · asked by Hi T 7 in Science & Mathematics ➔ Other - Science
The total amount of mass added by all the life forms that have ever lived (a lot more of this plants than dinosaurs), plus all the space dust, meteorites, etc., then yes they have added to the mass of the earth in its 4.6 billion years its been around. (In fact, you can think of life forms as taking airborn carbon in the form of CO2, and fixing it in solid form as carbon in the ground ... which is what oil is).
But the total amount of added mass is the equivalent of adding a grain of sand to a mountain. It is tiny compared to the huge mass of the earth. So the effect on gravity is probably too small to measure, much less affect anything.
2006-12-06 13:31:04 · answer #1 · answered by secretsauce 7 · 0⤊ 0⤋
Grav field intensity=g=G*M/R^2= 9.81N/Kg
G=6.67x10^-11, M=6x10^24Kg, R= 6.36x10^6m for the Earth
Let's assume all the accretion events since the time of the dinosaurs amounted to 10^15Kg,the variation in R=negligible..
> dg=G*dm/R^2= 1.65x10^-9 or 1.65 parts in a thousand million!
2006-12-06 23:00:49 · answer #2 · answered by troothskr 4 · 0⤊ 0⤋
I don't know which is worse, your literacy or your understanding of science. If you're still at school, you've got a chance to learn the different effects of atmosphere and gravity and learn enough English to be able to pose your question properly. It's worth learning how to express yourself.
2006-12-06 19:31:01 · answer #3 · answered by checkmate 6 · 0⤊ 0⤋
What about erosion?
2006-12-06 17:14:24 · answer #4 · answered by Anonymous · 0⤊ 0⤋