2. Spaghetti takes about 9 minutes to cook at sea level, but about 14 minutes in the mountains. Why do you think this is so?

water boils at a lower temperature in the mountains

Explanation:

The temperature at which the vapor pressure of water is equal to atmospheric pressure is lower in the mountains, because atmospheric pressure is lower there. Hence the temperature of boiling water is lower in the mountains.

Spaghetti cooked at a lower temperature takes longer to cook.