| Science fair projects can be fun experiences if you | | | | Humidity simply means how much water vapor or |
| find the right one. Do you know what the hardest thing | | | | moisture the air around us contains. The amount of |
| is for most students when assigned a science | | | | water vapor in the air will vary depending on the time |
| project? Many would say it's coming up with an idea | | | | of year, where you are located, the type of air mass |
| that interests them and then getting it started. If that is | | | | over your area at the time, etc. |
| the case with you, then these ideas for simple science | | | | How well air can hold moisture depends also on the |
| fair projects will be just what you need this year. | | | | temperature of the air. The higher the temperature the |
| Gravity | | | | more moisture air can hold. The lower the air |
| Gravity is the earth's pull or attraction on objects. | | | | temperature the less moisture the air can hold. |
| Gravity is what holds you and I to the ground and | | | | This is why we see dew on the cars and grass in the |
| keeps everything else that moves from floating around | | | | mornings sometimes. The air is often warmer during |
| in space. Everything from people, pets, rocks, water, | | | | the day than at night and collects moisture from |
| books, schools, houses, cars, softballs, and more, have | | | | evaporation. At night when the temperature drops the |
| weight because of the earth's gravity. You may know | | | | air can't hold all the moisture it has collected and it |
| that things have different weights depending on how | | | | condenses (the water falls out and collects on colder |
| big and dense they are. A small marble for example | | | | objects) onto cars, grass, etc. that are cooler. |
| weighs less than a baseball. | | | | Can you think of a simple science fair projects |
| Did you know that even though a baseball weighs | | | | experiment to show that air can hold more moisture |
| more, a small marble and a baseball will both fall | | | | when its warmer than when its colder? How about |
| through the air at the same speed? In other words if | | | | taking a glass of cold water from the refrigerator and |
| they are dropped from the same height, at the same | | | | placing it on a table or counter in a warm room. Does |
| time, they will both hit the ground at the same time. | | | | water collect on the outside of the glass? The colder |
| This idea can be easily turned into a simple science fair | | | | glass cools the warmer moisture laden air that is |
| project that you would enjoy. | | | | touching it causing some of the water to collect on the |
| Humidity | | | | outside of the glass. |