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.
Best Answer: 1. The act or process of conserving. 2. 1. Preservation or restoration from loss, damage, or neglect: manuscripts saved from deterioration under the program of library conservation. 2. The protection, preservation, management, or restoration of wildlife and of natural resources such as forests, soil, and water. 3. The maintenance of a physical quantity, such as energy or mass, during a physical or chemical change.