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.
Ribs cooked on a barbecue smoker at a low temperature for several hours will be very tender. Ribs cooked on a grill, especially a gas grill, will not be as tender even cooked indirectly. To make your ribs tenderer you can precook by either boiling the ribs for about 30 minutes or by placing them in a slow cooker.This will get the ribs going and not dried out. Once you are ready to grill then you can season the ribs and cook them indirectly until done.o make your ribs tenderer you can precook by either boiling the ribs for about 30 minutes or by placing them in a slow cooker. This will get the ribs going and not dried out. Once you are ready to grill then you can season the ribs and cook them indirectly until done.