4. (1)A calorie is the amount of heat required to raise the temperature of a kilogram (about a quart) of water one degree Celsius. (2)To determine the number of calories in a portion of food, a technician uses a device called a bomb calorimeter. (3)This device has a chamber that rests in a container of water. (4)The food is placed in this chamber, which is then filled with oxygen under high pressure. (5)Next, the food is set on fire. (6) _____ it burns, it gives off heat, and the temperature of the water in the container rises.
Click on the appropriate transition to fill in the blank.
a. Now.