Question | Answer |
To be or become aware of, especially through careful and directed attention; notice.To watch attentively:observe a child's behavior. | Observe |
To observe or inquire into in detail; examine systematically.To make a detailed inquiry or systematic examination. | Investigate |
The close or last part; the end or finish.The result or outcome of an act or process.A judgment or decision reached after deliberation | Conclusion |
A tentative explanation for an observation, phenomenon, or scientific problem that can be tested by further investigation. | Hypothesis |
A small object, usually built to scale, that represents in detail another, often larger object.A preliminary work or construction that serves as a plan from which a final product is to be made | Model |
A decimal system of units based on the meter as a unit length, the kilogram as a unit mass, and the second as a unit time. | Metric System |
A thing or things helpful in forming a conclusion or judgment:The broken window was evidence that a burglary had taken place. Scientists weigh the evidence for and against a hypothesis. | Evidence |
The rate or a measure of the rate of motion, especially:Distance traveled divided by the time of travel.The limit of this quotient as the time of travel becomes vanishingly small; | Speed |
The capacity to do work or cause physical change; energy, strength, or active power: | Force |
The natural force of attraction exerted by a celestial body, such as Earth, upon objects at or near its surface, tending to draw them toward the center of the body. | Gravity |
The rubbing of one object or surface against another.Conflict, as between persons having dissimilar ideas or interests; | Friction |
The act or process of changing position or place.A meaningful or expressive change in the position of the body or a part of the body; a gesture.Active operation:set the plan in motion. | Motion |
Relating to or aiding digestion.Functioning to digest food. | Digestive |
Of or relating to circulation | Circulatory |
Of, relating to, used in, or affecting respiration. | Respiratory |
Of, relating to, forming, or of the nature of a skeleton.Attached to or formed by a skeleton. | Skeletal |
Of, relating to, or consisting of muscle:muscular contraction.Having well-developed muscles | Muscular |
Of or relating to the nerves or nervous system:nervous tissue.Stemming from or affecting the nerves or nervous system:a nervous disorder.Easily agitated or distressed; high-strung or jumpy | Nervous |
To receive (property or a title, for example) from an ancestor by legal succession or will. | Inherited |
To gain possession of:acquire 100 shares of stock.To get by one's own efforts:acquire proficiency in math.To gain through experience; come by:acquired a growing dislike of television sitcoms | Acquired |
A distinguishing feature, as of a person's character.A genetically determined characteristic or condition:a recessive trait.A stroke with or as if with a pencil. | Trait |
The circumstances or conditions that surround one; surroundings.The totality of circumstances surrounding an organism or group of organisms, especially: | Environment |
The branch of biology that deals with heredity, especially the mechanisms of hereditary transmission and the variation of inherited characteristics among similar or related organisms. | Genetics |
The observable physical or biochemical characteristics of an organism, as determined by both genetic makeup and environmental influences. | Phenotype |
The act of extinguishing.The condition of being extinguished. | Extinction |
The act or process of adapting.The state of being adapted.Something, such as a device or mechanism, that is changed or changes so as to become suitable to a new or special application or situation | Adaptation |
A remnant or trace of an organism of a past geologic age, such as a skeleton or leaf imprint, embedded and preserved in the earth's crust. | Fossils |
The act, process, or result of classifying.A category or class.The systematic grouping of organisms into categories on the basis of evolutionary or structural relationships between them; taxonomy. | Classification |
To expose to harm or danger; imperil.To threaten with extinction.These verbs mean to subject to danger, loss, or destruction:driving that endangers lives; hazarded his health by smoking; | Endangered |
An overflowing of water onto land that is normally dry.A flood tide. | Floods |
The state of the atmosphere at a given time and place, with respect to variables such as temperature, moisture, wind velocity, and barometric pressure. | Weather |
The meteorological conditions, including temperature, precipitation, and wind, that characteristically prevail in a particular region. | Climate |
The cycle of evaporation and condensation that controls the distribution of the earth's water as it evaporates from bodies of water, condenses, precipitates, and returns to those bodies of water. | Water Cycle |
Orbital motion about a point, especially as distinguished from axial rotation:the planetary revolution about the sun. | Revolution |
A straight line about which a body or geometric object rotates or may be conceived to rotate.An unlimited line, half-line, or line segment serving to orient a space or a geometric objec | Axis |
One of the four natural divisions of the year, spring, summer, fall, and winter, in the North and South Temperate zones | Seasons |
The sun together with the nine planets and all other celestial bodies that orbit the sun.A system of planets or other bodies orbiting another star. | Solar System |
Different phases of moon by day and by night. | Moon Phases |
The path of a celestial body or an artificial satellite as it revolves around another body.One complete revolution of such a body. | Orbit |
The periodic variation in the surface level of the oceans and of bays, gulfs, inlets, and estuaries, caused by gravitational attraction of the moon and sun. | Tides |
The partial or complete obscuring, relative to a designated observer, of one celestial body by another | Eclipses |
The act or process of turning around a center or an axis:the axial rotation of the earth.A single complete cycle of such motion. | Rotation |