Plants Unit
Ecosystem Unit
Natural Resource
Water Unit
Weather Unit
100
The layer of a cell that holds the cell material inside and controls what substances enter and leave the cell.
What is cell membrane?
100
An organism's role in an ecosystem.
What is niche?
100
To use items again after their original use.
What is reuse?
100
The process by which water moves above, across, and through Earth's crust and ecosystem.
What is water cycle?
100
The average of all weather conditions in an area over a period of time.
What is Climate?
200
Plant tissue that carries water, and nutrients from a plant's roots to its leaves.
What is xylem?
200
A sequence of connected producers and consumers.
What is Food Chain?
200
A visible haze formed from smoke, other pollutants, and fog.
What is smog?
200
Solid or liquid water that falls from the air to Earth.
What is Precipitation?
200
A violently rotating column of air that extends downward from a thundercloud and touches the ground.
What is tornado?
300
A growth response of plants to light.
What is phototropism?
300
A diagram that shows how energy is lost at each level in a food chain.
What is energy pyramid?
300
A material that occurs in nature that is essential or useful to people.
What is natural resource?
300
The vast floor of the deep ocean.
What is abyssal plain?
300
The force of the weight of air pressing down on a unit of area.
What is air pressure?
400
A plant that has transport tissues for carrying water, food, and nutrients to its cells.
What is Vascular Plant?
400
An organism that benefits from its relationship with an organism that it lives in or on while the other organism is harmed.
What is Parasite?
400
The gradual long-term change of species in an ecosystem.
What is succession?
400
The border between continental crust and oceanic crust where the ocean floor drops in depth.
What is continental slope?
400
The boundary between two air masses that collide.
What is front?
500
The giving off of water by a leaf through its stomata.
What is Transpiration?
500
The measure of a population's size in relation to the size of the area in which the population lives.
What is population density?
500
The careful use of resources so that they will last as long as possible.
What is conservation?
500
The area of ocean between the high-tide level and the low-tide level.
What is intertidal zone?
500
A comparison of the actual amount of water vapor that would be in the air if it were saturated.
What is relative humidity?
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