Type
Crossword
Description

Our atmosphere contains 78% free _________________________. Nitrogen
Animals need nitrogen to produce ______________________. Proteins
What molecule is produced when nitrogen is fixed? Ammonia
Animals get nitrogen into their systems by eating _______________. Plants
Large organic molecule containing nitrogen that contains your genetic information. DNA
Prokaryote responsible for "fixing" nitrogen. Bacteria
_________________________ occurs when fertilizer runoff causes excess algae and water weeds. Eutrophication
Process where water "evaporates" from plants. Transpiration
What "powers" the water cycle? Sun
Rain, snow, sleet, or hail. Precipitation
The downward entry of water into the soil or rock surface. Infiltration
Process by which water changes from a liquid to a gas. Evaporation
Oats, peas, beans, corn Legumes
Helps plants to grow. Fertilizer
Bacteria that break down organic matter. Decomposers
Process by which water vapor turns into liquid water. Condensation

Nutrient cycles Crossword

Type
Crossword
Description

how many stages are there in the nitrogen cycle? FOUR
what can be used to increase nitrate levels in soil? fertilisers
How are nitrate ions absorbed by the plant? active transport
what is produced by dentrification? Nitrogen
what type of reaction is the conversion of ammonium ions to nitrate ions? Oxidation
which micro-organisms release ammonia? saprobiotic
What type of relationship exists between host plants and mycorrhizae bacteria? mutualistic
How are phosphates transferred from plants to animals? consumption
what process can occur due to overuse of fertilisers? eutrophication
where are nitrogen fixing bacteria found in legumes? root nodules

Photosynthesis Crossword

Type
Crossword
Description

process by which plants and some other organisms use light energy to convert water and carbon dioxide into oxygen and high-energy carbohydrates such as sugar and starches photosynthesis
organism that can capture energy from sunlight or chemicals and use it to produce its own food from inorganic compounds; also called a producer autotroph
the steps in photosynthesis that occur on the thylakoid membranes of the chloroplast and that convert solar energy to the chemical energy of ATP and NADPH, evolving oxygen in the process light reactions
a green pigment found in the chloroplasts of plants, algae, and some bacteria chlorophyll
an organism that obtains organic food molecules by eating other organisms or their byproducts and that cannot synthesize organic compounds from inorganic materials heterotroph
specialized ground tissue that makes up the bulk of most leaves; performs most of a plant's photosynthesis mesophyll
the second of two major stages in photosynthesis (following the light reactions), involving atmospheric CO2 fixation and reduction of the fixed carbon into carbohydrate. Calvin Cycle
a colored chemical compound that absorbs light, producing color pigment
A flattened membrane sac inside the chloroplast, used to convert light energy into chemical energy. thylakoid
granum (grana) a stack of thylakoids in a chloroplast granum
The fluid of the chloroplast surrounding the thylakoid membrane; involved in the synthesis of organic molecules from carbon dioxide and water. stroma
large protein that uses energy from H+ ions to bind ADP and a phosphate group together to produce ATP ATP synthase
The second of two major stages in photosynthesis, involving atmospheric CO2 fixation and reduction of the fixed carbon into carbohydrate. These reactions are also called the Calvin Cycle dark reactions
is the set of metabolic reactions and processes that take place in the cells of organisms to convert biochemical energy from nutrients into adenosine triphosphate (ATP), and then release waste products. Cellular respiration
a compound composed of adenosine and three phosphate groups that supplies energy for many biochemical cellular processes by undergoing enzymatic hydrolysis. ATP

Nitrogen Cycle Crossword

Type
Crossword
Description

The only organisms that can fix atmospheric nitrogen into chemical compounds Nitrogenfixingbacteria
Makes up 78 percent of the gases in the atmosphere Nitrogen
Nodules that live on the roots of plants Legumes
They are essential to the nitrogen cycle; breakdown wastes, such as urine, dung, leaves, and other decaying plants and animals decomposers
Some of the nitrogen that cycles from the atmosphere and living this is released to the soil with the help of Bacteria
Nitrogen in the air Atmospheric nitrogen
nitrogen-fixing bacteria in soil and roots of nodules produce ammonia
Other bacteria convert ammonia into; plants can use nitrates
The process by which bacteria changes fixed nitrogen back to gaseous nitrogen, which is then released back into the enviroment. denitrifying
The layers of gases that surround the earth; the air Atmosphere

The Nitrogen Cycle Crossword

Type
Crossword
Description

All organisms need ___________ to build proteins. Nitrogen
The only organisms that can fix atmospheric nitrogen into chemical compouds . Nitrogen-fixing bacteria
A process in which nitrogen is cycled between the atmosphere, bacteria, and other organisms. Nitrogen cycle
What type of plant does nitrogen-fixing bacteria live on? Legumes
What does bacteria use to produce nitrogen-containing compounds such as nitrates? sugars
Where do plants that do not have nitrogen-fixing bacteria in their roots get their nitrogen from? Soil
When animals eat plants or other animals to get nitrogen, that is an example of __________. usable nitrogen
In the nitrogen cycle, nitrogen moves between living things and the ______________. Atmosphere
__________ breaks down wastes and return the nitrogen that these wastes contain to the soil. Decomposers
Nitrogen makes up _______________ percent of the gases in the atmosphere. seventy eight

Nitrogen Cycle Crossword Puzzle

Type
Crossword
Description

step to make nitrogen useful to plants nitrogen fixation
What do farmers add to the soil to make it more rich in nitrogen fertilizer
the process by which nitrates are converted to nitrogen gas denitrification
plants use nitrogen to make ___________ protein
the process of ammonium getting changed into nitrates by bacteria nitrification
how plants get nitrogen assimilation
the part of the plant that absorbs nutrients from the soil roots
bacteria that convert ammonia to nitrites and nitrites to nitrates nitrifying bacteria
the process by which the protein in faeces, dead plants or animals is converted to ammonia ammonification
organisms such as bacteria and fungi decomposers

Biogeochemical Cycles Word Search

Type
Word Search
Description

albedo
bacteria
carbon cycle
carbon reserviors
condensation
denitrification
evaporation
greenhouse
groundwater
hydrological cycle
leaching
nitrification
nitrogen cycle
percolation
phosphorus
photosynthesis
precipitation
transpiration

The Nitrogen Cycle Crossword

Type
Crossword
Description

What is 78% of the air made of? Nitrogen
What do plants use nitrogen to make? Protein
One way for animals to get nitrogen compounds in their systems is? Consumption
How do plants get the nitrogen they need? Soil
What do farmers add to the soil to add more nitorgen into the soil? Fertilizer
Step to make nitrogen useful to plants Fixation
the process of ammonium getting changed into nitrates by bacteria Nitrification
How plants get nitrogen Assimilation
the process of decomposers turning the nitrogen back into ammonium ammonificaction
the process of extra nitrogen getting released into the air Denitrification

Energy Transfer Crossword

Type
Crossword
Description

Energy from the sun enters an ecosystem when a plant uses sunlight to make sugar molecules Photosynthesis
an organism that makes its own food Producer
Gets energy by eating other organism Consumer
Consumers that only eat producers Herbivores
Consumers that only eat other consumers Carnivores
consumers that eat both plants and animals omnivores
Breaks down dead organisms in an ecosystem and returns nutrients to the soil, water, and air Decomposers
the process of breaking down food to yield energy Cellular Respiration
a sequence in which energy is transferred from one organism to the next as each organism eats another organism Food Chain
A diagram that shows the feeding relationships between organisms in an organism Food web
One of the steps in a food chain or food pyramid Trophic level
A process by which carbon is cycled between the atmosphere, land, water, organism Carbon cycle
The only organisms that can fix atmospheric nitrogen into chemical compounds are a a few species of bacteria Nitrogen-fixing bacteria
the process in which nitrogen circulates among the air, soil, water, plants, animals in an ecosystem Nitrogen cycle
The movement of phosphorus from the environment to organisms and then back to the environment Phosphorus Cycle
a gradual process of change and replacement of some or all of the species in an community Ecological Succession
the type of succession that occurs on a surface where no ecosystem existed before; such as rocks or sand dunes Primary Succession
the more common type of succession, occurs on a surface where an ecosystem has previously existed Secondary Succession
a species the colonizes an uninhabited area and that starts an ecological cycle in which many other species become established Pioneer Species
a final, stable community in equilibrium with the environment Climax Community

Water, Carbon, Nitrogen Cycles Word Search

Type
Word Search
Description

air
ammonia
animals
atmosphere
bacteria
carbon
carbondioxide
cloud
condensation
consumer
decomposition
deforestation
evaporation
forest
fossilfuels
glacier
groundwater
lake
nitrogen
nitrogenfixation
nutrients
ocean
oceans
photosynthesis
plants
producers
river
soilsurface
sunlight
transpiration
water

Biology-Ecology Crossword

Type
Crossword
Description

A science that deals with the relationships between groups of living things and their environments Ecology
The place or type of place where a plant or animal naturally or normally lives or grows Habitat
Any living component that affect another organism Biotic Factor
Drawing from natural ecosystems which are defined as the network of interactions among organisms and between organisms and their environment Ecological Model
Non-living chemical and physical parts of the environment that affect living organisms and the functioning of ecosystems Abiotic Factor
The function or position of a species within an ecological community Niche
An autotrohpic organism that serves as a source of food for other organisms in a food chain. Producer
A heterotrophic organism that feeds on other organisms in a food chain. Consumer
The total mass of living matter within a given unit of environmental area. Biomass
An animal that feeds on plants. Herbivore
An animal that feeds on flesh. Carnivore
An animal that eats both plants and animals. Omnivore
an animal that feeds on dead organic material detritivore
break down dead or decaying organisms decomposer
the position an organism occupies in a food chain trophic level
series of organisms each dependent on the next as a source of food food chain
a system of interlocking and interdependent food chains food web
the flow of chemical elements between living organisms and the enviroment biogeochemical cycle
when a plant absorbs water in its roots transpiration
the chemical processes by which atmospheric nitrogen is assimilated into organic compounds nitrogen fixation
the process of ammoniating; decomposition with production of ammonia ammonification
biological oxidation or ammonium to nitrite followed by the oxidation of the nitrite to nitrate nirtification
the loss or removal of nitrogen or nitrogen compounds denitrification
the trapping of the sun's warmth in a plants lower atmosphere greenhouse effect
an organism that is able to form organic substances from simple inorganic substances autotroph
an organism deriving its nutritional requirements from complex organic substances heterotroph
process by which plants use sunlight to synthesize foods from carbon dioxide and water photosynthesis