Vocabulary 1
Vocabulary 2
Nitrogen Cycle
Carbon-Oxygen Cycle
Water Cycle
100
What happens in the nitrogen cycle?
Nitrogen gas is fixed or changed into forms of nitrogen that plants can use. Then animals eat the plants, die, and return to the soil.
100
What is transpiration?
the process in which plants give off water from their stomata
100
What provides energy for plants to grow?
the sun
100
Too much _____________is poisonous to animals.
carbon dioxide
100
What changes water on Earth's surface into water vapor?
the heat of the sun
200
What is the process that releases energy from food?
respiration
200
What happens in the water cycle?
water moves through the environment in different forms
200
What does the liquid waste or urine that animals produce contain?
ammonia
200
Over millions of years, the ______________in decaying organisms is turned into petroleum.
carbon
200
How do plants get water?
from their roots
300
What is condensation?
the process in which water vapor changes back to liquid water
300
What is decay?
when bacteria and fungi break down the tissue of dead plants and animals
300
How do plants make proteins?
from nitrogen in the air
300
What turned dead organic material into coal and petroleum?
heat and pressure
300
What causes water pollution?
rainwaters carry fertilizers and pesticides, factories releasing chemicals, dumping of motor oil
400
What is precipitation?
any form of water that falls from the clouds: rain, hail, snow, sleet
400
What do plants do during photosynthesis?
plants use sunlight, water, and carbon dioxide to make food
400
Earth's atmosphere is about ______% nitrogen.
78%
400
Plants release ______________ into the atmosphere and plants and animals release _____________.
oxygen, carbon dioxide
400
How can we conserve water?
use toilets and washers that don't use as much water, take shorter showers, turn off faucets more quickly
500
What happens in the carbon-oxygen cycle?
carbon and oxygen move among plants, animals, and the environment.
500
How are fuels formed?
over millions of years, the decaying of organisms with heat and pressure, created petroleum
500
A small amount of nitrogen is also fixed by ____________.
lightning
500
Name 2 human activities that upset the carbon-oxygen cycle.
burning fuels, cutting forests
500
Where is most fresh water found?
in glaciers and ice caps
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