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33 Cards in this Set
- Front
- Back
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The way of learning about the natural world |
science |
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means using one or more of your senses to gather information |
observation |
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Si, or ________________________________, is the standard system or measurement |
international system of units |
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the SI unit of length |
meter |
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the measure of the amount of matter in an object |
mass |
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how people change the world around them to meet their needs or to solve practical problems |
technology |
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a ____________ is a feature of topography, such as a hill or a valley formed by the process that shape Earth's surface |
landform |
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A ______ is a flat model of all or part of Earth's surface as seen above |
map |
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A ________ is a sphere that represents Earth's entire surface |
globe |
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_______ is the removal of rock particles by wind, water, ice or gravity |
erosion |
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the process that breaks down rock and other substances at Earth's surface |
weathering |
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_____ is the loose, weathered material on Earth's surface in which plants can grow |
soil |
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The A horizon is made up of __________, a crumbly, dark brown soil that is a mixture of humus, clay and other minerals |
top soil |
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The B horizon often called ______ usually consists of clay and other particles washed down from A horizon |
sub soil |
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___________ occurs where the agents of erosion, deposit or lay down sediment |
deposition |
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________ is the ability to work or cause change |
energy |
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A prairie dog is one type of __________ or living thing |
organism |
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The study of how living things interact with each other and with their environment |
ecology |
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The community of organisms that live in a particular area, along with their nonliving surroundings, make up an |
ecosystem |
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Natural selection results in ___________, the behaviors and physical characteristics that allow organisms to live successfully on their environments |
adaptations |
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a group of land ecosystems with similar climates and organisms |
biomes |
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An object is in _________ when its distance from another object it changing |
motion |
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the distance an object traveled per unit of time |
speed |
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An upward force that objects falling through air experience is called __________________ |
air resistance |
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The law of __________________ states that the force of gravity acts between all objects in the universe |
universal gravitation |
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The _________ is the overall force when all the forces have been added together |
net force |
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The _______________________________ states that the total momentum of the objects that interact does not change |
law of conservation of momentum |
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The __________of an object is the product of its mass and velocity |
momentum |
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Newton's ________ law of motion states that the net force of an object is equal to the product of its acceleration and its mass |
second |
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_________ is the force that one surface exerts on another when the two rub against each other |
friction |
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One _________ equals the force required to accelerate one kilogram of mass at 1 meter per second |
newton |
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the gravitational force that pulls the satellite toward the center of Earth |
Centripetal force |
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An object is in _________ when the only force acting on it as it falls is gravity |
free fall |
