Answer:
Matter in an ecosystem:
- must be continuously replenished
- is recycled and reused
- is returned to the earth by decomposers
Yes, for a prove :
" <span>On Friday morning (March 6), NASA's Dawn spacecraft will arrive at Ceres, becoming the first probe ever to orbit a dwarf planet. Ceres is the largest object in the asteroid belt between Mars and Jupiter, and the closest dwarf planet to Earth" - google ...
CAN THIS MAYBE HELP ?
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C. Amino Acids.
Proteins consist of strands of amino acids, which is produced in the ribosomes of the cell.
The correct answer is: A. How does changing the amount of water affect the growth of corn?
While options B, C & D are not impossible to test, option A is the only question that can be tested using quantitative methods, such as statistical analysis. The question in option A states: "How does changing the amount of water affect the growth of corn?". This question is easily testable using scientific investigation, because controlled or measured amounts of water can be added to corn, and the consequent growth rate of corn can be easily measured and recorded. However, the questions in options B, C & D cannot be precisely measured using quantitative tools, since they aim to measure qualitative (subjective) factors, such as: ethics, happiness and disappointment.