Science 5.2 Flashcards
bacteria and plants
necessary organisms in nitrogen cycle
denitrification
release of nitrogen from nitrogen compounds
artificial fertilizer
may upset nitrogen cycle
greenhouse effect
carbon dioxide and water vapor trapping heat
nitrogen fixation
Changing nitrogen to nitrogen compounds
ozonosphere
screens out ultraviolet rays
respiration
process of obtaining energy from food
temperature
main difference in layers of atmosphere
troposphere
the sphere of overturning
water droplets
forms as water vapor condenses
Unnecessary part of the nitrogen cycle
animals
Nitrogen makes up _________ percent of the atmosphere.
78
Carbon dioxide is exchanged between the atmosphere and __________.
the oceans
the two basic processes of life involve in the carbon-oxygen cycle are _________
respiration and photosynthesis
Carbon stored in animals is returned to the atmosphere when they __________
decompose
oxygen makes up __________ percent of the atmosphere
21
humans return carbon stored in fossils to the carbon- oxygen cycle by burning __________.
coal and oil
the process of changing a gas to a liquid is known as ___________
condensation
oceans store more carbon dioxide than is stored in the _________
atmosphere
water is kept from completing the water cycle by being stored _____________
in ice
the process of changing liquid to a gas is called ________________
evaporation
Heat is necessary for water to _____________
evaporate
Rain or snow falling to the ground is called ___________
precipitation
water vapor that condenses on particles of dust forms ______
droplets
for the entire Earth, the amount of evaporation must equal the amount of _____________
precipitation
True or false
an increase in the amount of carbon dioxide in our atmosphere will cause a warming trend.
true
True or false
transpiration is evaporation from plants
true
True or false
Carbon dioxide easily dissolves in ocean water
true
True or false
ideally, the rate at which plants produce oxygen is equal to the rate at which living things use oxygen
true
photosynthesis is a step in the carbon-oxygen cycle in which __________ are exchanged into foods containing carbon.
carbon dioxide and energy
respiration is a step in the carbon-oxygen cycle in which foods containing carbon are changed into __________
energy and carbon dioxide
A step in the nitrogen cycle which is unfavorable to farming is __________
denitrification
plants that have bacteria in root nodules are called ____________
Legumes
animals must eat __________________ to obtain protein.
