uses of oxygen

For respiration - All air breathing animals and plants use oxygen present in air by the process of respiration. This is known as aerobic respiration. During respiration, food is burnt in living cells by using oxygen to release energy for all metabolic activit..

Oxygen has varied industrial and scientific uses. Oxygen (or dioxygen) is used in steel making It is also used in oxy-hydrogen and oxy-acetylene welding torches. Oxygen is used as an oxidizer in rocket propellants and in..

Estimate the temperature shown in the figure using o F. => 55 o F or 18 o F or 30 o F or 10 o F..

To Demonstrate Aerobic Respiration The apparatus shown is called the respiroscope that is used to demonstrate respiration. Few germinating seeds are taken in the bulb of the respirometer. The tube is inserted into a beaker containing mercury. A pellet of KOH is introduced into the set..

Compare - 7 and 2, using a number line. => - 2 > 7 or It can not be compared because one is positive and other is negative or - 7 < 2 or - 7 > 2..

There were 15 spoons on the table. George used 2 of them. Choose a number sentence to find the remaining spoons. => 15 - 2 = 12 or 15 - 2 = 14 or 15 - 2 = 13 or 15 - 2 = 11..

Mrs.Jenny instructed her students to write an expression that equals 10 using the numbers 2, 3, 5 and 7. Choose the correct answer. => 3 × 5 + 7 - 2 or 3 - 5 + 7 × 2 or 3 × 5 - 7 + 2 or 3 × 7 + 5 - 2..

Charles used 2.3 gallons of milk from a jug filled with 4.0 gallons of milk and prepared an ice cream. How much milk is left in the jug? => 7.1 gallons or 0.17 gallons or 2.3 gallons or 1.7 gallons..

Using a number line, find the sum of 2 and 7. => 10 or 9 or 8 or 7..

Find 2 × 28 using the array shown. => 30 or 18 or 20 or 56..