Sawing a board in half is a physical change not a chemical change the board doesnt change wood or whatever material it is is still would still be wood
If it were burned it would be a chemical change but its properties stay the same atomically so thats why its not a chemical change.
Answer:
true because of the elements
Answer:
A
Explanation:
B and D have to do with plants
and C has nothing to do with cellular resporation.
Answer: Kw (mol2 dm-6):1.008 x 10-14 pH:7.00
Explanation:
When two air masses meet together, the boundary between the two is called a weather front. At a front, the two air masses have different densities, based on temperature, and do not easily mix. One air mass is lifted above the other, creating a low pressure zone.
