The hypothesis is that the various sizes of planets and the Sun in our solar system can be represented with fruit and umbrellas.

You will use fruits to represent the planets in the solar system and umbrellas to represent the Sun. Then, you will pick which fruit represents each planet based on size and order them according to their distance from the Sun.

You will need 1 watermelon, 1 large grapefruit, 1 large apple, 1 orange, 2 cherry tomatoes, 1 blueberry, 1 peppercorn and 3 large umbrellas to represent the Sun.

By using fruits to represent the planets, you can get a hands-on experience of our solar system's sizes and distances. The biggest object, the Sun, dwarfs all the planets, and there are eight planets in total, which are divided into two categories: rocky or terrestrial and gas giants. You can remember the order of the planets with mnemonics like 'My Very Educated Mother Just Served Us Nachos'.

This science project is interesting because it allows you to explore the concept of size and distance in our solar system in a fun and interactive way.

Experiment variations could include using different fruits or objects to represent the planets, or adding a discussion about the unique features of each planet.