7. 1 2 3 4 5

8. 1 2 3 4 5

10. 1 2 3 4 5

11. 1 Plants need light to grow. How much light does Mars get compared to Earth? How could you get your plants the light that they need? 2 Plants need nutrients, particularly nitrogen, from soil. How could you get your plants the soil and nutrients that they need? 3 Plants need water. Assume you have some water available. How could you use plants to recycle water for human use while still keeping the plants hydrated? 4 Plants need CO 2. Thankfully humans breath out CO 2 and Mars has a lot of CO 2 available. How could you use the plants to provide a breathable environment for humans? 5 Mars’s atmosphere doesn’t block harmful radiation as well as Earth’s does, and Mars has gravity that is about 1/3 as strong as Earth. How might these conditions affect your plants? Could you design a greenhouse in a way that would help your plants handle these conditions?

12. 1 Plants need light to grow. How much light does Mars get compared to Earth? How could you get your plants the light that they need? 2 Plants need nutrients, particularly nitrogen, from soil. How could you get your plants the soil and nutrients that they need? 3 Plants need water. Assume you have some water available. How could you use plants to recycle water for human use while still keeping the plants hydrated? 4 Plants need CO 2. Thankfully humans breath out CO 2 and Mars has a lot of CO 2 available. How could you use the plants to provide a breathable environment for humans? 5 Mars’s atmosphere doesn’t block harmful radiation as well as Earth’s does, and Mars has gravity that is about 1/3 as strong as Earth. How might these conditions affect your plants? Could you design a greenhouse in a way that would help your plants handle these conditions?

13. 1 Plants need light to grow. How much light does Mars get compared to Earth? How could you get your plants the light that they need? 2 Plants need nutrients, particularly nitrogen, from soil. How could you get your plants the soil and nutrients that they need? 3 Plants need water. Assume you have some water available. How could you use plants to recycle water for human use while still keeping the plants hydrated? 4 Plants need CO 2. Thankfully humans breath out CO 2 and Mars has a lot of CO 2 available. How could you use the plants to provide a breathable environment for humans? 5 Mars’s atmosphere doesn’t block harmful radiation as well as Earth’s does, and Mars has gravity that is about 1/3 as strong as Earth. How might these conditions affect your plants? Could you design a greenhouse in a way that would help your plants handle these conditions?

14. 1 Plants need light to grow. How much light does Mars get compared to Earth? How could you get your plants the light that they need? 2 Plants need nutrients, particularly nitrogen, from soil. How could you get your plants the soil and nutrients that they need? 3 Plants need water. Assume you have some water available. How could you use plants to recycle water for human use while still keeping the plants hydrated? 4 Plants need CO 2. Thankfully humans breath out CO 2 and Mars has a lot of CO 2 available. How could you use the plants to provide a breathable environment for humans? 5 Mars’s atmosphere doesn’t block harmful radiation as well as Earth’s does, and Mars has gravity that is about 1/3 as strong as Earth. How might these conditions affect your plants? Could you design a greenhouse in a way that would help your plants handle these conditions?

15. 1 Plants need light to grow. How much light does Mars get compared to Earth? How could you get your plants the light that they need? 2 Plants need nutrients, particularly nitrogen, from soil. How could you get your plants the soil and nutrients that they need? 3 Plants need water. Assume you have some water available. How could you use plants to recycle water for human use while still keeping the plants hydrated? 4 Plants need CO 2. Thankfully humans breath out CO 2 and Mars has a lot of CO 2 available. How could you use the plants to provide a breathable environment for humans? 5 Mars’s atmosphere doesn’t block harmful radiation as well as Earth’s does, and Mars has gravity that is about 1/3 as strong as Earth. How might these conditions affect your plants? Could you design a greenhouse in a way that would help your plants handle these conditions?