algae: A single-celled organism that was once thought to be a plant (though it is not actually a plant). As aquatic organisms, they grow in water. Like green plants, they rely on sunlight to make food.
astronaut: A person trained to travel into space for research and exploration.
carbon: A chemical element that is the physical basis of all life on Earth. Carbon exists freely as graphite and diamond. It is an important part of coal, limestone, and petroleum, and can chemically self-combine to form a vast number of chemically, biologically, and commercially important molecules.
carbon dioxide:(or CO2) A colorless, odorless gas produced by all animals when the oxygen they breathe reacts with the carbon-rich food they eat. Carbon dioxide is also released when organic materials (including fossil fuels such as oil and gas) are burned. Carbon dioxide acts as a greenhouse gas, trapping heat in the Earth's atmosphere. Plants convert carbon dioxide into oxygen during photosynthesis. This process is used to make their own food.
chemistry: A field of science that deals with the composition, structure, and properties of matter and their interactions. Scientists use this knowledge to study unknown materials, reproduce large quantities of useful materials, and design and create new and useful materials. (About compounds) Chemistry is also used as a term to refer to a recipe for a compound, how to make it, or some of its properties. People who work in this field are called chemists.
crops: (in agriculture) a type of plant that is intentionally cultivated and cultivated by farmers, such as corn, coffee, and tomatoes. Alternatively, the term may be applied to the part of a plant that is harvested and sold by a farmer.
cyanobacteria: A type of bacteria that can convert carbon dioxide into other molecules such as oxygen.
electricity: A flow of charge that results from the movement of negatively charged particles, usually called electrons.
microorganisms: Abbreviation for microorganism. Organisms that are too small to be seen with the naked eye and include bacteria, some fungi, and many other organisms such as amoebas. Most are composed of a single cell.
Life: All living things, from elephants and plants to bacteria and other types of single-celled organisms.
oxygen: A gas that makes up about 21% of the Earth's atmosphere. All animals and many microorganisms require oxygen to facilitate growth (and metabolism).
particle: A trace amount of something.
photosynthesis: (verb: photosynthesis) The process by which green plants and other organisms use sunlight to produce food from carbon dioxide and water.
protists: A broad group of primarily unicellular organisms that are neither plants nor animals. Some, like algae, look like plants. What are known as protozoa can also look like animals. Additionally, some look like fungi. The more blocky members of the group are known as amoebas.
Source: www.snexplores.org
