Biology, chemistry, physics, and earth science content tested on the Praxis General Science: Content Knowledge exam. Front: the term or concept. Back: a plain-language definition.
39 cards · basic cards · AI-written, checked twice. Edit anything.
- What is a eukaryotic cell?
- A cell with a membrane-bound nucleus and other membrane-bound organelles.
- What is photosynthesis?
- A process in which plants use light energy to convert carbon dioxide and water into glucose and oxygen.
- What is cellular respiration?
- A process in which cells break down glucose to release energy in the form of ATP.
- Define mitochondria.
- An organelle in eukaryotic cells that produces ATP through cellular respiration, often called the powerhouse of the cell.
- What is DNA?
- A molecule that stores genetic information in the form of instructions for building and maintaining living organisms.
- What is natural selection?
- The process by which traits that increase survival and reproduction become more common in a population over time.
- Define photosynthetic organisms.
- Living things that can convert light energy into chemical energy, such as plants and certain bacteria.
- What is an ecosystem?
- A community of organisms and their physical environment, including all the living and nonliving things in an area.
- What is homeostasis?
- The process by which an organism maintains stable internal conditions despite external changes.
- Define enzyme.
- A protein that speeds up a chemical reaction in cells without being consumed in the reaction.
- What is an atom?
- The smallest unit of matter that retains the properties of an element, composed of protons, neutrons, and electrons.
- What is the periodic table?
- A systematic arrangement of all known elements organized by atomic number and chemical properties.
- Define oxidation.
- A chemical process in which a substance loses electrons, often to oxygen, or increases in oxidation state.
- What is a covalent bond?
- A chemical bond formed when two atoms share one or more pairs of electrons.
- Define ionic bond.
- A chemical bond formed when an electron is transferred from one atom to another, creating oppositely charged ions.