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50 Cards in this Set
- Front
- Back
qualitative observation
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an observation made without numbers
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quantitative observation
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an observation made with numbers
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metric unit of mass
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gram
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metric unit of volume
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litter
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matric unit of distance
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mmeter
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metric unit of weight
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newtons
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definition of mass
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measure of the amount of matter in an object
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definition of volume
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amount of space something takes up
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definition of weight
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measure of the force of gravity on an object
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tool used to measure mass
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balance
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tool used to measure liquid volume
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graduated cylindar
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tool used to measure solid volume
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ruler
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tool used to measure force
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spring scale
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tool used to meassure length
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meter stick
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definition of manipulated variable
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factor that you can change
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definition of responding variable
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the factor that changes as a result
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definition of controled variable
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all but one variable is constant
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definition of ecosystem
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living and nonliving things in an area
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definition of habitat
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a place where an organism lives and provides things it needs to live
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definition of producer
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an organism that can make its own food
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definition of consumer
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organism that obtains energy by feeding off other organisms
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definition of decomposer
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organism that breaks down large molequels from dead organisms into small molequels and returns materials to the enviornment
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definition of food chain
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series of events where one organism eats another organism and obtains energy
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definition of predator
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carnivor that hunts and kills other animals for food and has adapttations to help it catch its prey
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definition of prey
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what a predator eats
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definition of pioneer species
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1st species to populate an ecosystem
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definition of primairy sucession
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changes in an area where no ecosystem exists
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definition of secondary sucession
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changes i an area that occor after a disturbance in an ecosystem
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definition of energy
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the ability to do work or cause change
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definition of kinetic energy
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energy of movement
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definition of potential energy
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stored energy
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an example of kinetic energy
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toy spring unwings
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an example of potential energy
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lift a book from a desk
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metric unit of force
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newton
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metric unit of work
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m/s
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metric unit used to measure speed
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m/s
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2 parts that make up a wheel
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wheel and axle
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three examples of work not being done
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1. moving a car stuck in snow
2. holding books 3. holding something in place |
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what happens to an objects momentum if mass is increased
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momentum is increased
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definition of energy
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the ability to do work and cause change
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definition of gravitational potential energy
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potential energy that depends on height of object
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definition of energy comversion
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changing fron one form of energy to another
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definition of respiration
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cells break down simple food molequels to release the energy they contain
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definition of photosynthesis
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plants and other organisms capture light energy and make other food from carbon dioxide and water
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what type of energy conversion happens during respiration
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chemical to thermal
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what type of energy conversion happens during photosynthesis
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electromagnetic (radiant) to thermal
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what is the shape of the moons orbit around the sun
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elipse
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at what angle is the earths axis tilted at
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23.5
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why do some parts of the world have 4 seasons when others have 2
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some get more direct sunlight
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what are seasons on earth caused by
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the tilt of the earths axis
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