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Science Exam

7th Grade Final Exam Science Study Guide

TermDefinition
Abiotic Matter matter that makes up the nonliving parts of an ecosystem, such as air, water, and rocks
Adaptive Trait a trait that makes it more likely that an individual will survive in a specific environment
Atom the tiny pieces that all matter—all the stuff in the world—is made of
Biodome a closed ecosystem made by humans
Biotic Matter matter that makes up the living and dead organisms in an ecosystem
Carbon a type of atom (a tiny piece) that makes up molecules such as carbon dioxide and energy storage molecules
Carbon Dioxide a molecule made of carbon and oxygen atoms
Cellular Respiration the chemical reaction between oxygen and glucose that releases energy into cells
Chloroplast the part of a cell where photosynthesis happens
Chromosome a long piece of DNA that contains many genes
Consumer an organism that needs to eat in order to get energy storage molecules (such as starch and fat)
Decomposer an organism that gets energy storage molecules (such as glucose) by breaking down dead matter
DNA a type of molecule that genes and chromosomes are made of
Ecosystem all the living and nonliving things interacting in a particular area
Environment everything (living and nonliving) that surrounds an organism
Feature a characteristic that all members of a species have, which varies between organisms
Fertilization when a male and female reproductive cell combine to create an offspring
Function how something works
Gene an instruction for making a protein molecule
Heterozygous having gene versions that are different
Histogram a graph that uses bars to show how characteristics or values are distributed within a group
Homozygous having gene versions that are the same
Inherit to receive genes from a parent
Mitochondria the part of a cell where cellular respiration happens
Mutation a random change to a gene that sometimes results in a new trait
Natural Selection the process by which the distribution of traits in a population changes over many generations
Non-adaptive Trait a trait that makes it less likely that an individual will survive in a specific environment
Nucleus the part of a cell where genes are found
Photosynthesis the process by which plants and other producers use energy from sunlight to change carbon dioxide and water into oxygen and glucose (an energy storage molecule)
Population a group of the same type of organism living in the same area
Predator an animal that hunts and kills other animals for food
Prey an animal that is hunted or killed by another animal for food
Producer an organism that can make its own energy storage molecules (such as glucose)
Protein Molecule a type of large molecule that performs important functions inside organisms
Ribosome the parts of the cell that build protein molecules based on instructions from genes
Sexual Reproduction the process of parents creating offspring; sperm and egg cells combine to create the first cell of an offspring
Species a group of organisms of the same kind (in one or more populations) that do not reproduce with organisms from any other group
Structure the way something is shaped or constructed
Trait a specific characteristic of an individual organism
Variation any difference in traits between individual organisms
Created by: wthornton