I am pretty sure it is A because you could use a test tube or beaker filled with water and turn it upside down in another container filled with water and then use a hose or something to let the gas into the test tube to displace the water.You can't have use a gas that is soluble in water. am pretty sure it is A because you could use a test tube or beaker filled with water and turn it upside down in another container filled with water and then use a hose or something to let the gas into the test tube to displace the water.
verb (used with object), preserved, preserving. 1. to keep alive or in existence; make lasting: to preserve our liberties as free citizens. 2. to keep safe from harm or injury; protect or spare. 3. to keep up; maintain: to preserve historical monuments.
Use the noun preservation to refer to the protection of something â especially from loss, injury, or danger. You might fight for the preservation of the woodlands near your house because of all the animals that live there. Preservation is also a process that keeps organic things from decomposing. If the preservation of the flowers in your prom corsage is important to you, you can dry the flowers to keep them from decaying. If you dry them, they'll probably last longer than your relationship with your high school boyfriend! The word preservation is often used when referring to historic preservation, which is the protection of buildings and sites of historic significance.