1. **State the problem:** The penguin nursery is open two times a day: half an hour at noon and half an hour in the afternoon. We need to find the total time it is open every day. 2. **Formula and rules:** To find the total time open, add the two time intervals together. 3. **Calculation:** $$\frac{1}{2} + \frac{1}{2} = \frac{1+1}{2} = \frac{2}{2}$$ 4. **Simplify the fraction:** $$\frac{\cancel{2}}{\cancel{2}} = 1$$ 5. **Interpretation:** The penguin nursery is open 1 hour every day. **Final answer:** The penguin nursery is open 1 hour every day.