  Earth's atmosphere, on the other hand, is mostly nitrogen (78%) and oxygen (21%) with 1% being a mix of hydrogen, carbon dioxide and others. So you can see that Mars has much less atmosphere than the Earth does and oxygen make a proportionally much smaller fraction of of what there is than what we have on Earth.
Pickup trucks come in different shapes and sizes, and their weight entirely depends on the make and model. On average, a common pickup truck can weigh up to 3 tons, equivalent to 6,000 pounds.
1 Some companies will just use a round figure of 3000 pounds per cubic yard. 2  Not all trucks will hold 20 tons per load. 3  Again, find out from the dealer how big a truck load is. 4  The size of the truck will not change the calculations any, but it will help determine how many loads you need for your project.