Is is possible to produce food to eat and air to breathe while in space? The short answer: it's not easy, but it can be done.
Air is made up of nitrogen (78%) and oxygen (21%) with small amounts of other gases such as argon and carbon dioxide. It probably then comes as no surprise that nitrogen is important for all organisms as it helps them to live and grow.
Most people do not think twice about soil, but we could not live without it. The plants we eat, and the plants that feed the animals we eat, depend on soil. Plant roots need soil for physical support. Plants also get nutrients from soil, which they need for healthy growth and development. Future astronauts on a long-term mission to Mars will want to grow some food crops to add to their diet of packaged food.
This video describes how vertical farming works to provide the needs of growing plants. The pros and cons of vertical farming are also highlighted.
This video by It's Okay to be Smart, describes the effects of the space environment on the human body.
The Seeds of Knowledge learning strategy offers students a process to practice the skill of making connections by connecting their prior knowledge and learning experiences from previous grades to a new inquiry opportunity, such as the Tomatosphere™ Seed Investigation.
The Making Connections Organizer learning strategy uses a graphic organizer to help students connect science inquiries to their prior knowledge and experiences, prior inquires and the world at large.
Japanese astronaut Kimiya Yui on board the International Space Station shows Paxi what it's like to prepare and eat food in weightlessness on the ISS.
The skill of questioning allows students to pursue their ideas and explore the world around them. Being able to ask rich questions about who, what, where, when, why, and how, enables students to construct their knowledge and develop an understanding of concepts and experiences.
The Testable Questions Toss-up learning strategy offers students a process to generate and practice writing testable questions that may be applied to conducting fair tests within an inquiry investigation.
The skill of Making Connections involves the process of connecting prior knowledge to new knowledge and experiences. This process allows students to relate what they read, see, do and experience to themselves, to the world around them and/or to other things they have read, seen or experienced previously.
When we measure things, most people are only worried about how accurate, or how close to the actual value, they are. Matt Anticole explains what exactly precision is and how can help us to measure things better.
Without leaves, there would not be life on Earth. Leaf size can vary from the tiniest leaf of the common water fern (Azolla filiculoides) that are just one mm in length, to the largest leaves of the raffia palm (Raphia regalis) measuring 25 meters in length. No matter the size, most leaves are adapted for photosynthesis. This is a very important process where plants convert light energy into sugars and oxygen.
One of the major differences between plants and animals is that plants cannot move from place to place to get away from an unfavourable environment or situation. But this does not mean that plants do not move at all. A tropism is plant movement in response to an external stimulus in the environment.
Explore Research at the University of Florida: Anna-Lisa Paul, a research associate professor of horticultural sciences, explains an aspect of her research in the space biology program.