Zero conditional

If you cool water, it freezes at 0°F

If people eat fruit and vegetables, they prevent an obese condition

If you add salt to water, the salt dissolves

If you avoid drinking coffee before bedtime, you don't affect your body clock

If you eat meat and poultry, you affect your health

If people eat junk food, they keep a healthy condition

If you drink a small cup of coffee at night, you can sleep with no trouble

If you heat water to 212 °F, it boils

If you drink coffee before bed, you can't sleep

If you eat junk food, you get overweight