{"id":3319,"date":"2025-08-23T23:27:56","date_gmt":"2025-08-23T23:27:56","guid":{"rendered":"https:\/\/science.gsfc.nasa.gov\/stella\/?p=3319"},"modified":"2025-08-24T00:31:01","modified_gmt":"2025-08-24T00:31:01","slug":"space-agriculture-enclosure-system-safe-student-activities-with-accessible-materials","status":"publish","type":"post","link":"https:\/\/science.gsfc.nasa.gov\/stella\/space-agriculture-enclosure-system-safe-student-activities-with-accessible-materials\/","title":{"rendered":"&#8220;The Golden Pathos Theory&#8221; &#8211; Single Plant Testing"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"3319\" class=\"elementor elementor-3319\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8d77eb3 e-flex e-con-boxed e-con e-parent\" data-id=\"8d77eb3\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b7d4d12 elementor-widget elementor-widget-heading\" data-id=\"b7d4d12\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">\"The Golden Pathos Theory\" - Single Plant Testing\u200b<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-aa9c2db e-flex e-con-boxed e-con e-parent\" data-id=\"aa9c2db\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-83c8f54 elementor-widget elementor-widget-heading\" data-id=\"83c8f54\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Plant Respiratory Champions (Basic STELLA-Q2)<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6652aec elementor-widget elementor-widget-text-editor\" data-id=\"6652aec\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>STELLA Instrument<\/strong>: STELLA-AQ CO\u2082 sensor<\/p><p><strong>NASA Connection<\/strong>: <a href=\"https:\/\/science.nasa.gov\/mission\/veggie\/\" target=\"_blank\" rel=\"noopener\">ISS Vegetable Production System (Veggie)<\/a>, <a href=\"https:\/\/science.nasa.gov\/mission\/advanced-plant-habitat\/\" target=\"_blank\" rel=\"noopener\">Advanced Plant Habitat on ISS<\/a><\/p><p><strong>Background Context:<\/strong><br \/>Astronauts on the International Space Station consume oxygen and produce carbon dioxide, just as we do on Earth. The ISS uses complex mechanical systems to remove CO\u2082, but future long-duration missions to Mars will need sustainable biological systems to supplement mechanical ones. NASA&#8217;s Advanced Plant Habitat experiments are investigating which plants might be most efficient for these life support systems.<\/p><p><strong>Enhanced Materials:<\/strong><\/p><ul><li>Various plant types: Golden Pothos, Spider Plants, Snake Plants, and Peace Lilies<\/li><li>Clear containers with ventilation system<\/li><li>STELLA-AQ CO\u2082 sensor<\/li><li>Data recording sheets and graphing materials<\/li><li>Light meter (smartphone app is acceptable)<\/li><li>Digital timer<\/li><\/ul><p><strong>Enhanced Procedure:<\/strong><\/p><ol><li><strong>Baseline Measurement<\/strong>: Record room CO\u2082 levels using STELLA-AQ<\/li><li><strong>Plant Preparation<\/strong>: Measure and record the leaf surface area of each test plant<\/li><li><strong>Test Chamber Setup<\/strong>: Place plants in ventilated containers with STELLA-AQ sensor nearby<\/li><li><strong>Light Control<\/strong>: Ensure equal light exposure for all plants (measure with light meter)<\/li><li><strong>Data Collection<\/strong>: Record CO\u2082 levels at 30-minute intervals for 4 hours<\/li><li><strong>Comparative Analysis<\/strong>: Calculate CO\u2082 reduction rate per square cm of leaf area<\/li><li><strong>Day\/Night Cycle<\/strong>: Repeat measurements in light and dark conditions<\/li><li><strong>Scaling Calculation<\/strong>: Determine how many plants would be needed for one astronaut<\/li><\/ol><p><strong>Student Inquiry Questions:<\/strong><\/p><p><strong>Pre-Activity Questions:<\/strong><\/p><ol><li>Why do astronauts on the ISS need systems to remove carbon dioxide from their air?<\/li><li>How might plants help solve the air quality challenges for long-term space missions?<\/li><li>What factors do you think might affect a plant&#8217;s ability to process carbon dioxide?<\/li><li>Why might NASA be interested in finding the most efficient plants for space habitats?<\/li><li>How is Earth&#8217;s natural carbon cycle different from what would happen in a space habitat?<\/li><\/ol><p><strong>During-Activity Questions:<\/strong><\/p><ol><li>What changes are you observing in the CO\u2082 readings over time?<\/li><li>Which plant appears to be reducing CO\u2082 levels most quickly?<\/li><li>What might explain the differences in CO\u2082 processing between different plant species?<\/li><li>How does the plant&#8217;s leaf area seem to relate to its CO\u2082 processing ability?<\/li><li>What would happen if we increased the light intensity? Why?<\/li><\/ol><p><strong>Post-Activity Analysis Questions:<\/strong><\/p><ol><li>Which plant processed the most CO\u2082 per square centimeter of leaf area?<\/li><li>How do your results compare with your initial predictions?<\/li><li>If a human astronaut produces about 1 kg of CO\u2082 per day, calculate how many of your most efficient plant would be needed to process this amount.<\/li><li>What limitations did our experiment have compared to an actual space habitat?<\/li><li>How might microgravity affect plant CO\u2082 processing in space?<\/li><li>What other benefits might plants provide in a space habitat beyond CO\u2082 removal?<\/li><\/ol><p><strong>Data Analysis Challenge:<\/strong> Calculate the &#8220;Plant Efficiency Index&#8221; by dividing the CO\u2082 reduction rate by the plant mass. Which plant gives you the most CO\u2082 processing for the least weight\u2014an important consideration for space missions where every gram counts?<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-439016b elementor-widget elementor-widget-heading\" data-id=\"439016b\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Safety First: Universal Precautions for All Activities<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6935251 elementor-widget elementor-widget-text-editor\" data-id=\"6935251\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>General Safety Guidelines:<\/strong><\/p><ul><li><strong>Adult Supervision Required<\/strong>\u00a0for all activities involving tools, electrical components, or chemical mixtures<\/li><li><strong>Safety Glasses<\/strong>\u00a0must be worn when handling powders, mixing materials, or using tools<\/li><li><strong>Gloves<\/strong>\u00a0(nitrile or latex-free) when handling soil mixtures or plant materials<\/li><li><strong>Well-Ventilated Area<\/strong>\u00a0for all activities involving powders or sprays<\/li><li><strong>Hand Washing<\/strong>\u00a0before and after all plant handling<\/li><li><strong>Emergency Procedures<\/strong>\u00a0clearly posted with nearest eyewash\/first aid locations<\/li><\/ul><p><strong>Material Safety Data:<\/strong><\/p><p>All suggested materials are non-toxic and food-safe, but proper handling prevents irritation and contamination.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Students test common houseplants as space life-support systems using STELLA-Q2 sensors to measure CO2 consumption. With safe, affordable materials, they determine which plants produce the most oxygen for future Mars habitats.<\/p>\n","protected":false},"author":2,"featured_media":1296,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[53,16,15,54,7,85,28],"tags":[63,61,88,97,96,62],"class_list":["post-3319","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-activity","category-air","category-applications","category-beginner","category-instruments","category-plants","category-stella-aq","tag-agriscience","tag-education","tag-engineering","tag-mars","tag-space","tag-stem"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>&quot;The Golden Pathos Theory&quot; - Single Plant Testing - STELLA<\/title>\n<meta name=\"description\" content=\"Activity\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/science.gsfc.nasa.gov\/stella\/space-agriculture-enclosure-system-safe-student-activities-with-accessible-materials\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"&quot;The Golden Pathos Theory&quot; 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