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third grade science

Terms

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may flies
Fragile-winged insects that develop from nymphs and only live a few days as adults.
photosynthesis
The process in green plants and certain other organisms where sugar is combined from carbon dioxide and water using light as an energy source. Most forms of photosynthesis release oxygen.
snails
Freshwater mollusk that has a spiral shell.
mammal
An animal with a backbone (vertebrate) that gives birth to live babies (not eggs) and feeds its babies milk.
water boatman
A water insect that has paddlelike hind legs.
bullheads
A North American catfish with a large head.
prey
The animals that try not to get eaten by the predators!
frogs
A tailless amphibian with smooth, moist skin that lives in a damp habitat.
leeches
Blood-sucking water worms.
vertebrate
Any animal that has a backbone.
snakes
A long, scaly reptile without legs.
ferns
A flowerless, seedless plant.
poplars
Talleastern North American trees that lost their leaves. They have large, tuliplike green and orange flowers and yellowish wood.
water fleas
A tiny water insect that kind of "hops" like a flea in the water.
food chain
A food pathway that links different species. Energy and nutrients are passed from one organism to another.
king fisher
A fish- or insect-eating bird that has a large head and a long, wide bill and usually has a crest and brilliant colors..
reptile
A vertebrate that has dry, scaly skin, lays eggs, and is covered by a leathery shell. Snakes, lizards, turtles, crocodiles are reptiles.
backswimmer
Bugs that swim upside down on or near the surface.
trout
A freshwater fish with a speckled body and small scales.
decomposer
Fungi and bacteria are the most important. They break down dead remains and release things like CO2 (carbon dioxide) back into the environment
mussels
A freshwater clam.
fungi
A soft, spongy plant without leaves or a green part.
nymph
An immature form of some insects. They look like adults, but are smaller.
beaver
North America's largest rodent. It spends a lot of time in or near the water, build its home (a lodge) and has a flat tail.
carnivore
An animal that eats only other animals.
ducks
A web-fotted, swimming bird.
life cycle
A series of stages from the beginning to the end of life.
plankton
Microscopic organisms that live in the water environment and form a very important part of the freshwater community.
turtles
A reptile with a hard shell that spends a lot of time in the water.
duck weed
Any water plant that floats freely on still (unmoving) water.
mosquitoes
A blood-sucking insect that can transmit some diseases.
moss
A timy, leafy-stemmed flowerless plant often found on rocks and tree trunks.
habitat
The natural environment for an organism.
reed grass
Tall grass with feathery plumes that grow in ponds and marshes.
paramecium
A single-celled organism in ponds that can swimn, rotate, and change directions. There are many in ponds.
microorganisms
Any organism that is too small to be seen without a microscope.
larva
One of the phases in the life cycle of some insects. Insect larva do not have wings.
perch
A spiny-finned freshwater fish.
winkles
Sea snails.
damsel flies
A thin, nonsting insect that looks like a dragonfly with wings that fold into the body.
producer
Green plants and some kinds of bacteria. They make their own food.
amphibian
A cold blooded vertebrate (an animal with a backbone) that must develop into an adult in the water, but it also spends time on land.
aquatic
Living on or near water for most of its life.
invertebrate
Animals that do not have a backbone and are cold-blooded.
herons
A water bird that is usually white with a long neck, long legs, and a long, pointed bill.
camouflage
When someone or something is camouflaged, it blends in with its surroundings, becoming hidden.
volvox
A green, freshwater algae that forms a hollow circle of cells.
pond weed
Most any plant that grow in a pond or stream.
balance of nature
The idea that a natural system with live in equillibrium (everything is contributing equally)
herbivore
An animal that eats only plants.
rushes
Stiff marsh plants with hollow stems.
lichens
A fungus that grows with algae.
predator
An animal that catches and kills other animals. It is a carnivore.
sedges
Coarse, grass-like plants that grow in wet places.
omnivore
An animal that eats both plants and animals.
marsh marigold
Swamp-growing plants wtih bright yellow flowers.
caddis flies
A water insect with 2 pairs of hairy wings and resembles a moth.
water beetles
A beetle that has adapted to living in the water.
birch
A tree with smooth, white bark.
food web
A community of living things. Each species may be involved in several food chains.
dragon flies
A thin, nonsting insect that looks like a damselfy with wings that stick out.
consumer
They can't make their own food. They take in food from others.
toads
A tailless amphibian that is related to the frog but spends most of its time on land and has a dry, warty skin.
pond skaters
A long-legged bug that skims about on the surface of water.
periwinkles
A sea snail.
algae
Simple aquatic plants that do not have roots, stems, or leaves, They live in many different environments and are a natural part of aquatic ecosystems.
otters
A furry, weasel-like mammal that lives near the water.
newts
A small, brightly-colored salamander.
whelks
Large, edible marine snails.
amoeba
A one-cell organism.

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