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science olympiad
elementary flash cards
| Term | Definition |
|---|---|
| abiotic | a nonliving part of an ecosystem |
| acid | a chemical compound that 1. turns blue litmus paper red 2. has a pH of less than 7 3. tastes sour sharp or biting 4. when combined with a base can form a salt |
| accommodation | an individual organism's response to a change in the ecosystem |
| adaption | a trait or characteristic that helps an organism survive and meet its needs |
| amphibian | a vertebrate animal that spends part of its life in water and part on land |
| aquifer | an underground layer of rock, sand, or gravel through which water easily moves |
| atom | the smallest particle of matter that has the properties of that matter |
| bacteria | microorganisms that have cell membranes but no nuclei |
| balance | a tool that measures an object's mass |
| barometer | an instrument for measuring air pressure |
| bedrock | the bottom layer of soil, made mostly of solid rock |
| biome | a region of the world defined by its climate and the types of plants and animals that live there |
| boiling point | the particular temperature at which a substance changes state from liquid to gas |
| camouflage | an adaption that allows an animal to blend into its surroundings |
| carnivore | an animal that only eats the meat of other animals |
| cell | the smallest unit of life |
| chemical compound | a substance made of two or more different elements |
| chlorophyll | a green pigment that allows a plant cell to use light to make food |
| circuit | a path that electricity follows |
| conductor | a material through which heat or electricity flows easily |
| constellation | a group of stars that forms a pattern or picture |
| consumer | a living thing that eats other living things for food |
| crust | the layer of rock that forms the outer surface of earth |
| cytoplasm | the gel-like substance that fills a cell |
| decomposer | consumer that breaks down the remains and wastes of plants and animals |
| density | a measure of how tightly matter is packed in a given amount of space |
| diffusion | the movement of materials from an area of higher concentration to an area of lower concentration |
| digestion | the process that changes food into a form that the body can use |
| diversity | a measure of the number and variety of species in an ecosystem |
| ecosystem | an area in which living things interact with one another and with nonliving things |
| electron | the particle in an atom that has a negative charge |
| element | a basic building block of matter |
| energy | the ability to do work or cause change; ability to make things move, stretch, or grow |
| epicenter | where an earthquake is felt most strongly or has its greatest intensity |
| equator | an imaginary line that circles Earth halfway between the North and South poles |
| erosion | the movement of rock material from one place to another |
| eruption | the flow of lava or ash from a volcano |
| extinct | all dead; no more left alive on earth |
| fault | a break or crack in Earth's crust where two plates come together |
| feces | solid waste produced by the body during digestion |
| fission | a reaction in which the nucleus of an atom is split |
| food chain | the path of food energy in an ecosystem from plants to animals |
| force | a push or pull that causes an object to move, stop, or change direction |
| forest | a biome that has many trees |
| fossil | the remains or signs of past life |
| friction | a force that occurs when one object rubs against another object |
| fungus | a plant-like organism that breaks down dead or dying plants |
| galaxy | a very large group of stars |
| gas | a form of matter that has no definite shape or volume |
| gem | a mineral valued for its beauty |
| generator | a device that converts other forms of energy into electricity |
| genetics | the study of how organisms pass along traits over periods of time |
| geothermal | heat energy produced from within earth's crust |
| glacier | a large mass of slow-moving ice |
| gravity | the pulling force between two objects |
| habitat | the place where a plant or animal lives |
| headland | a point of land, usually high, that extends out into the water |
| heat | the form of energy related to the random motion of the atoms and molecules that make up matter |
| herbivore | an animal that eats only plants |
| humidity | the amount of water vapor in the air at any given time |
| humus | decayed plant or animal material in soil |
| hypothesis | a suggested statement or explanation that can be tested to answer a question |
| igneous | type of rock formed when melted rock |
| inertia | the property of matter that keeps an object at rest or moving in a straight |
| insect | a type of animal that has three main body parts and six legs |
| insulator | something that slows or stops the flow of energy, such as heat, electricity, or sound |
| invertebrate | an animal that does not have a backbone |
| island | a landform that can be the result of a volcanic eruption at a hot spot |
| jet stream | narrow belt of high-speed winds in the upper troposphere |
| jupiter | the fifth planet from the sun and the largest planet in the solar system |
| kinetic energy | the energy of motion |
| kingdom | the broadest group into which organisms are classified |
| landslide | the sudden movement of loose rock and soil down a steep slope |
| lattitude | a measure of how far a place is north and south of the equator |
| lava | molten rock that reaches Earth's surface |
| lens | an object that refracts light |
| lichen | a living thing composed of a fungus and an algae which can survive in harsh environment |
| light | a form of energy that can travel in waves through empty space |
| lithosphere | the cool,solid portion of Earth that includes all of the crust and part of the upper mantle |
| machine | something that changes stored energy into motion and heat |
| magma | the molten rock beneath Earth's surface |
| magnet | an object that can attract iron and produce magnetic field |
| mammal | a vertebrate animal with hair that feeds its young milk |
| mantle | the thick layer of Earth beneath the crust |
| marine | another name for a saltwater environment |
Created by:
krissyhetherington