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33 Cards in this Set

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The way of learning about the natural world

science

means using one or more of your senses to gather information

observation

Si, or ________________________________, is the standard system or measurement

international system of units

the SI unit of length

meter

the measure of the amount of matter in an object

mass



how people change the world around them to meet their needs or to solve practical problems

technology

a ____________ is a feature of topography, such as a hill or a valley formed by the process that shape Earth's surface

landform

A ______ is a flat model of all or part of Earth's surface as seen above

map

A ________ is a sphere that represents Earth's entire surface

globe

_______ is the removal of rock particles by wind, water, ice or gravity

erosion

the process that breaks down rock and other substances at Earth's surface

weathering

_____ is the loose, weathered material on Earth's surface in which plants can grow

soil

The A horizon is made up of __________, a crumbly, dark brown soil that is a mixture of humus, clay and other minerals

top soil

The B horizon often called ______ usually consists of clay and other particles washed down from A horizon

sub soil

___________ occurs where the agents of erosion, deposit or lay down sediment

deposition

________ is the ability to work or cause change

energy

A prairie dog is one type of __________ or living thing

organism

The study of how living things interact with each other and with their environment

ecology

The community of organisms that live in a particular area, along with their nonliving surroundings, make up an

ecosystem

Natural selection results in ___________, the behaviors and physical characteristics that allow organisms to live successfully on their environments

adaptations

a group of land ecosystems with similar climates and organisms

biomes

An object is in _________ when its distance from another object it changing

motion

the distance an object traveled per unit of time

speed

An upward force that objects falling through air experience is called __________________

air resistance

The law of __________________ states that the force of gravity acts between all objects in the universe

universal gravitation

The _________ is the overall force when all the forces have been added together

net force

The _______________________________ states that the total momentum of the objects that interact does not change

law of conservation of momentum

The __________of an object is the product of its mass and velocity

momentum

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

_________ is the force that one surface exerts on another when the two rub against each other

friction

One _________ equals the force required to accelerate one kilogram of mass at 1 meter per second

newton

the gravitational force that pulls the satellite toward the center of Earth

Centripetal force

An object is in _________ when the only force acting on it as it falls is gravity

free fall