Our Mars system is about Air Supply. We built a greenhouse. It grows plants for oxygen and so we could eat the plants. Since we decided to use Hydroponics (Hydroponics are where you can grow certain plants on water) we used 4 certain plants. We used Lady Fingers, Cucumbers, Peas, and Tomatoes. It’s gray and it has water on the bottom and then a blocker to block the water from the surface then the plants. It also has a pipe so the oxygen can travel to the buildings on Mars. We built it with a shoe box and construction paper. We also used straws, plastic, aluminum foil, and paint. We used the shoe box as the greenhouse. The construction paper was for the water, the blocker, etc. The straw was for the pipe. The plastic was for the the roof so it could let sunlight through for the plants, and the aluminum foil was for the Solar Panels. We colored the aluminum foil black so it could really look like Solar Panels. We colored the Solar Panels with a sharpie. We used paint for the box.  We chose the color gray because black attracts the heat and white reflects the heat so we did a combination of both colors and we got the color gray.