| A | B |
|---|
| Spontaneous Generation | Process by which life begins when ethers enter nonliving things |
| Biogenesis | Principle that life comes only from life |
| Cell | Basic unit of organization of living things |
| Tissues | Several cells working together for a specific purpose |
| Organs | Several types of tissues working together for a specific purpose |
| Scientific method | Process that involves making predictions and designing an experiment and making observations and interpreting them |
| Hypothesis | Possible explanation for an event or observations |
| Variable | Factor that is changed in an experiment |
| Control setup | Part of the experiment that does not have the variable (does not change) |
| Theory | Hypothesis that has been supported by experiments |
| Carbohydrate | An organic compound that stores energy and gives shape to organisms |
| Lipid | Fats and oils |
| Protein | Complex molecule composed of amino acids |
| Nucleic acid | Large molecule (makes DNA or RNA) |
| Element | Substance that cannot be broken down into simpler substances |
| Compound | Two or more elements chemically combined in definite proportions |
| Organic compound | Compound that contains carbon |
| Enzyme | Catalytic protein that speeds up a chemical reaction |
| Metabolism | Sum of all chemical processes in an organism |
| Homeostasis | Maintenance of a stable set of internal conditions |
| Acid | Compound that releases H+ ions in water |
| Base | Compound that releases OH- ions in water |
| pH scale | Standard measurement of acids and bases |
| Cell theory | Cells are the basic unit of life and all living things are make of cells and cells come from other cells |
| Cell membrane | Thin layer that separates cell contents from outside environment |
| Cytoplasm | Jellylike substance inside cells |
| Nucleus | Control center of cell |
| Chromosome | Structure in cell that contains the genetic information |
| Prokaryote | Cell without nucleus |
