You want to place a piece of glass tubing into a ruber stopper after the tubing has been fire polished and cooled. This is best done by

explanation:

detials on each model with digrams

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.

answerlinnaeus;