This Resource is part of the Tomatosphere™ Program
Designed for: Grades K-8 For use by:
Learning Styles: Classroom based
Resource Type: Document
Tomatosphere™ uses the excitement of space exploration to teach the skills and processes of scientific experimentation and inquiry. Students investigate the effects of the space environment on the growth of food that will inevitably support long-term human space travel.
Each classroom is sent two packages of tomato seeds. One package contains seeds that have been sent into space to the International Space Station. The other package will contain “control” seeds, which have not been in space. Through the Tomatosphere™ program, students will learn how to conduct a scientific experiment and compare the germination rates of the two groups of seeds. Tomatosphere™ relies on a “blind test” in which educators and students will not know which of the two packages are the space seeds and which are control seeds until the germination process is complete and results have been submitted.
Tomatoes are extremely versatile and nutritious. They have high levels of vitamin A and vitamin C and also contain lycopene, an ingredient that may help prevent certain cancers and cardiovascular disease. Tomatoes are included in the Dietary Guidelines for Americans – 1015 – 2020 which has a key recommendation of “a variety of vegetables from all of the subgroups – dark green, red and orange, legumes (beans and peas), starchy and others” – actually, the number one recommendation!
The seeds are a plum tomato type from traditional, conventional sources and have not been altered through any means (including biotechnology). They are a variety of seed from H.J. Heinz Canada – H9478 F1. This is a very versatile variety that can be used for tomato paste products, fresh juice, and whole peel. The plants will produce mature fruit in a period between 85 and 105 days depending upon growing conditions.
Teachers and students will not know the origin of the two different types of seeds used in the program until germination results have been submitted. This maintains the validity of the experiment.
One group of seeds is a control group; these seeds have had no special treatment. A second group of seeds have been sent to space and have spent time on the ISS.
Food availability and life support are major limiting factors in extended space travel (Mars) and exploration. Plants will be needed to provide a source of fresh, nutritious food and to generate a vital life support system. The addition of oxygen and water as well as the removal of carbon dioxide to the closed environment aboard the space vehicle will be vital to the long-term mission. Currently scientists need to know how extended periods of time in space affect the germination and growth of plants.
Tomatosphere is supported by First the Seed Foundation, Stokes Seeds, HeinzSeed, and the University of Guelph.
The supporters provide both monetary and “in-kind” contributions to the program. Tomatosphere™ is indebted to the individuals and organizations that have come together from academia and the private sector to make this a successful program.
First the Seed Foundation manages the operations of Tomatosphere™ in the United States. Teachers are encouraged to visit these sponsors’ website.
Mars will be the next major global space program after the International Space Station and the establishment of a base on the Moon. Canada is positioning itself to play a signature role in the exploration of Mars and in the provision of life support and closed environment systems for space travel. Canada is also participating in the Aurora Program with the European Space Agency.
There are opportunities for teachers to direct students to gather a variety of information about the tomato plants, their germination, vigor and growth patterns. However, the key element of the Tomatosphere™ research program focuses on the germination rates of the seeds that are planted. The students will observe:
As an option, teachers may wish to have their students collect data on:
Students will compile information, the teacher will submit the results online at the Tomatosphere™ website and the results will be combined with the other Tomatosphere™ experiments across the United States. An automatic response will then convey which of the seeds were in each of the two seed packages. Students will be able to compare their class data with other classrooms.
In addition, teachers receive a certificate of participation for students in the class. The certificate is signed by former Canadian Astronaut, Dr. Robert Thirsk, and the principal investigator of the Tomatosphere™ program, Dr. Michael Dixon from the University of Guelph.
The scope of the experiment will depend on the teacher, the interest of the students, and the amount of time available in the curriculum for this topic. We recognize the difficulties of covering large amounts of content for classroom teachers and have designed the program to align with curriculum requirements. The Tomatosphere™ program should be viewed as an integral part of the current curriculum rather than an “add-on” to the curriculum.
Students will observe the process anywhere from seedling germination to full-grown tomatoes (approximately 3 months). The critical germination period is 1-3 weeks, and the growth period is about 4-6 weeks. Teachers may choose to focus ONLY on the germination part of the program; alternatively, the program can continue with observations about plant vigor and growth.
Tomatosphere™ connects with the curriculum for science inquiry and process skills, as well as the following science content strands:
The Tomatosphere™ Program has been designed to align with the curriculum concepts and skills and supports students’ learning of experimental design and inquiry skills. The Tomatosphere™ Program will allow teachers to engage a variety of science expectations as well as the opportunity to involve students in cross-curricular activities like careers, environmental studies, health and nutrition, mathematics and even the arts.
Teachers are the key contact persons for the program.
Teachers will receive the seed packages in the spring of each year. Planting can take place either in the spring or the fall. Suggestions for implementing the Tomatosphere™ program can be found in other parts of this website. In addition, there are classroom documents to assist with the implementation.
Conducting the experiment in the spring will allow plants to be transferred outside for growth in the summer in most areas. However, if teachers are doing ONLY the germination component (some schools are semestered and the project needs to be incorporated into the fall schedule), then spring or fall implementation is fine.
One of the key roles for the teacher is the online submission of results. We ask that teachers complete this task since the submission also involves assessment of the Tomatosphere™ program itself.
Home schoolers are encouraged to work with others in the area and combine to form a “small class” that can be involved. This will ensure that our seeds are utilized to the best advantage for the program budget. It also provides an opportunity for home-schooled students to work in a group environment and to be involved in a team approach, much like the environment in which astronauts and other scientists work.
A group of home schooling families can plan and implement the program together and designate one family as the contact and register. The contact should register as a classroom teacher indicating the number of teachers as ONE and also indicating the number of students involved.
Tomatosphere™ focuses on science – biology, space, energy. However, we recognize that the program will be of interest to teachers in other areas as well, particularly those teachers teaching about the applications of science, including environmental studies, nutrition, and social studies. The curriculum connections and assessment suggestions focus on science.
You can register here online at the First the Seed Foundation Website. Depending on when you register, you will receive your seeds at different times. If you register by February, you should receive your seeds at the end of February; if you register between February and mid-March, you should receive your seeds at the end of March. If you register after mid-March, you probably should receive your seeds approximately 2 weeks after registration.
The program involves automatic annual renewal for teachers; however, teachers will always receive a notice in the fall and winter asking if they wish to be removed from the Tomatosphere™ database.
Cosmic radiation is the big unknown in terms of responses by living organisms (plant and animal). There is a considerable amount of radiation shielding on ISS to protect the crew but questions still remain about how this will affect plants (especially long term genetic affects or mutations). As for micro-gravity (or migro-g), there does not appear to be any direct physiological affects on plants, especially seeds, but since gas exchange at the leaf surface (CO2, O2, water vapor) and water availability in the root zone are very different in micro-g this may affect plant-environment interaction in the longer term objectives of growing plants in space.
We don’t expect much in the way of lasting effects on seeds from micro-g but the jury is still out on the radiation affects. Yes, they should persist indefinitely after the seeds return to Earth if there are genetic influences. As levels of public education about radiation in space improve, this will likely become a more important aspect of the science missions regarding plants in space.
There are extreme limitations on the availability of astronaut time, resources and space on the ISS. The question posed by this experiment is “If seeds are exposed to space conditions (e.g. 6 months on ISS as an analog of a transit mission to Mars which takes about 6 months) will they still germinate and perform their roles as life support machines for humans supplying food, oxygen, fresh water and scrubbing carbon dioxide?” Obviously if germination is an issue then we have a lot of work to do to make sure our proposed life support systems perform reliably on the Moon, Mars and beyond. So this first part of the question is a critical (albeit small) step in advancing the technology of biological life support systems in space.
Since we are just looking mainly for seed germination effects at this stage and expect any of these to persist in the seeds long after exposure it should not make a difference where the germination experiments take place. The longer term goals of growing plants on other planetary surfaces in our solar system will require a great deal more experimentation and technology developments. The Russians and Americans have grown plants on MIR and the ISS fort many years but their objectives were not related to education and outreach. Tomatosphere™ uses the great appeal of space to the younger generations to deliver a science education message including learning related to space science, plant science, nutrition science and the scientific method of experimental investigation.