The two main variables in an experiment are the independent and dependent variable. An independent variable is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable. A dependent variable is the variable being tested and measured in a scientific experiment. The dependent variable is 'dependent' on the independent variable. As the experimenter changes the independent variable, the effect on the dependent variable is observed and recorded. For example, a scientist wants to see if the brightness of light has any effect on a moth being attracted to the light.
1 Remove ribs from refrigerator and start Traeger grill on smoke for 10 minutes. 2  Put ribs on grill and cook on smoke for 1 hour. 3  Change heat setting to 225-250 and cook for another 2 hours.4  Spray ribs with apple juice and cover with aluminum foil tightly and cook at 250-275 for another hour. Put ribs on grill and cook on smoke for 1 hour. 2  Change heat setting to 225-250 and cook for another 2 hours. 3  Spray ribs with apple juice and cover with aluminum foil tightly and cook at 250-275 for another hour.
2. Cook the ribs slowly for 1-1/2 to 2 hours, over medium heat (325Â° to 350Â°) and over a drip pan half filled with water. Long, slow cooking makes for moist and tender ribs with a crisp crust. If in the first 30 minutes the ribs are browning too quickly, shut the grill vents. 3. Determining when pork ribs are done is a little tricky, but after 1-1/2 to 2 hours, you can be virtually certain that the ribs are fully cooked. However, the meatâs color is not an indication of doneness.