Clues for: Science & Nature

Question Answer Value Airdate
Data compiled by Rhodium Group says if cows were a country, they'd be the world's 6th-largest emitter of this greenhouse gas methane 200 January 28, 2022
These insects, Bombyx mori, like to munch on mulberry leaves silkworms 600 January 28, 2022
These subatomic particles come in 6 flavors & interact by means of the strong force quarks 800 January 28, 2022
It's defined as the sum of all chemical reactions that take place in each cell & provide energy for activities metabolism 1000 January 28, 2022
He wrote that in 1666 "I procured me a triangular glass-prisme, to try therewith the... phenomena of colours" Sir Isaac Newton January 28, 2022
In the 19th century the plant pest Phylloxera vitifoliae nearly wiped out this industry in France, Italy & Germany wine 200 May 2, 2017
Peas have 14, shrimp have 254 & humans have 46 of these nucleic acid structures, arranged in 23 pairs chromosomes 400 May 2, 2017
This contagious viral children's disease characterized by spots is sometimes called morbilli measles 600 May 2, 2017
This element's symbol W comes from wolfram, its alternate name tungsten 800 May 2, 2017
The fluff on this tree, a type of poplar, contains seeds that are dispersed by the wind for only two weeks a year a cottonwood 1000 May 2, 2017
In June 1991 weightlessness experiments were conducted on about 2,500 jellyfish aboard this the Space Shuttle 200 November 24, 2009
The ARS, an agency of this U.S. government department, is looking to develop better bio-insecticides the Department of Agriculture 400 November 24, 2009
Despite the fierce appearance of this plated beast, scientists believe it to have been an herbivore a <i>Stegosaurus</i> 600 November 24, 2009
Platinum, atomic number 78, is worth more than this other metal, atomic number 79 gold 800 November 24, 2009
In 2009 a new hominid skeleton dubbed Ardi was aged at 4.4 million years, predating this other "girly" find by 1 mil. years Lucy 1000 November 24, 2009
Mesquite can send these down 60 feet to reach moisture roots 200 June 27, 2008
(Jimmy of the Clue Crew lights a peanut on fire.) The oil in the peanut is almost 100 percent fat, which burns & produces energy, a process that's measured by this unit a calorie 400 June 27, 2008
This physics term refers to the study of the effects of extremely low temperatures cryogenics 600 June 27, 2008
(Sarah of the Clue Crew puts salt & pepper in beakers of water.) The molecular structure of salt allows it to dissolve in water; the pepper will only disperse, creating this type of mixture, from the Latin for "hung up" a suspension 800 June 27, 2008
In 1955 physicists Owen Chamberlain & Emilio Segre discovered the antiproton, which has this kind of charge negative 1000 June 27, 2008
This part of the glass snake breaks off to help it escape when grabbed the tail 200 February 7, 2006
It's the frog-like term for a poisonous mushroom a toadstool 400 February 7, 2006
Crabs & cockroaches belong to this phylum, from the Greek for "jointed feet" an arthropod 600 February 7, 2006
This element, symbol Co, was once popular for making invisible ink cobalt 800 February 7, 2006
The absolute temperature scale with its lowest point being zero is named for this scientist who introduced it (Lord) Kelvin February 7, 2006
Hunting & forest clearing (not a luxury automaker) have endangered this largest wild cat of the Americas the jaguar 200 October 4, 2004
Like an escargot, the abalone is an edible one of these gastropods a snail 400 October 4, 2004
It's the branch of physics that deals with the nature & properties of light optics 600 October 4, 2004
The flowers on this type of myrtle tree resemble the crinkly paper of the same name crepe 1000 October 4, 2004
Hermann Muller won a 1946 Nobel Prize for proving that the use of these can cause mutations X rays October 4, 2004
In 1997 the world said "Hello Dolly" to one of these mammals, the first successfully cloned a sheep 200 May 24, 2004
The poorwill is one of the few species of birds that's known to do this in the winter hibernate 400 May 24, 2004
Codeine & morphine are both made from opium, which is obtained from a species of this flower the poppy 600 May 24, 2004
Lignite, a low-grade type of this rock, is only about 30 percent carbon coal 800 May 24, 2004
Sweeter than sucrose, this fruit sugar is found in fruits as well as in honey fructose 1000 May 24, 2004
The deepest diver among these birds is the emperor species of this, which may dive to 900 feet in the Antarctic waters penguin 200 March 4, 2004
A grub is this soft, thick stage of metamorphosis of flies, wasps & beetles larva 400 March 4, 2004
It's the fossilized resin from pine trees amber 600 March 4, 2004
(Sarah of the Clue Crew in Alaska) This bovine name is given to the process whereby huge chunks of ice break off glaciers, giving birth to icebergs calving 800 March 4, 2004
This cloudy atmosphere containing the nucleus of a comet may reach a diameter of 1 million miles coma 1000 March 4, 2004
Alphabetically, it's the first mammal that could be in a "Starts With 2 Vowels" category aardvark 200 November 10, 2003
It's the main metal in both bronze & brass copper 400 November 10, 2003
From their size, about 2.5 cm. & how they crawl, caterpillars of the moth family Geometridae are often called this inchworm 800 November 10, 2003
This property is the reason a rubber ball bounces & a stretched rubber band springs back to size elasticity 1000 November 10, 2003
(Jimmy of the Clue Crew at Cape Cod, Massachusetts) When lightning strikes the sand, it can melt & fuse it into a type of this, called fulgurite glass November 10, 2003
Today, there are only 2 continental glaciers: one on Greenland & one on this continent Antarctica 200 March 24, 2003
It's OK to kiss under this parasitic plant; just don't eat the berries -- that could be the kiss of death mistletoe 400 March 24, 2003
The lowest pressure at sea level was 25.69", measured during one of these tropical storms in the Philippine Sea typhoon 600 March 24, 2003
The reticulated species, the largest of these snakes, may reach a length of 33 feet python 800 March 24, 2003
When the moon appears between half & full, it's said to be this, either waxing or waning gibbous March 24, 2003
This one of the simple machines can be made by using a wheel & a rope pulley 100 October 30, 2001
Manufacturers of fireworks use barium to give off a green color & sodium to produce this color yellow 200 October 30, 2001
Inhaling & exhaling result from the contraction of this muscle at the floor of the chest cavity diaphragm 300 October 30, 2001
(Sarah of the Clue Crew is at Sea World in San Diego.) In the wild, the polar bear feeds mainly on these, especially the ringed species seals 400 October 30, 2001
The elements erbium, terbium, ytterbium & yttrium are named for the town of Ytterby in this country Sweden 500 October 30, 2001
About one-millionth as bright as our sun, these small red stars are also known as flare stars dwarfs 100 May 25, 2001
The mud eel is not really an eel, but a species of this tailed amphibian a salamander 200 May 25, 2001
Of the 6 simple machines in physics, this one uses a spiral inclined plane a screw 300 May 25, 2001
All 6 noble gases were discovered on Earth between 1894 & 1900; this one, symbol Rn, was the last radon 500 May 25, 2001
The name of this Alpine flower is German for "noble white" Edelweiss May 25, 2001
75 miles long & 64 miles wide, the Mauna Loa volcano in this state is the world's largest active volcano Hawaii 100 March 21, 2001
It can be a voracious reader, or a beetle larva that feeds on paper Bookworm 200 March 21, 2001
When a tropical storm's winds increase past 74 MPH, it's classified as one of these Hurricane 300 March 21, 2001
12 to 30 miles up, this atmospheric "layer" largely in the stratosphere protects us from the full force of ultraviolet rays Ozone layer 400 March 21, 2001
The ants seen here of the genus Atta are known by this "occupational" name Leafcutter ants 500 March 21, 2001
The cuttlefish hides 2 ways: it can camouflage itself like a chameleon, or hide behind a cloud of this ink 100 October 19, 2000
Having 4 large pairs of these makes the fruit fly a favorite subject for geneticists chromosomes 200 October 19, 2000
A silvery food fish, or to heat ore in order to extract metal smelt 300 October 19, 2000
In rhyme, the bells of St. Clement's speak of these 2 fruits that'll help prevent scurvy oranges & lemons 400 October 19, 2000
Unlike most of its pine family relatives, the larch is classified as this, as it loses its needles each fall deciduous October 19, 2000
Surprisingly, the smooth soft-shell species of this reptile is said to be able to run as fast as a man Turtle 100 September 19, 2000
When it flows out of the earth, it becomes lava; when blasted into tiny fragments, it becomes volcanic ash Magma 200 September 19, 2000
Common fuels in rockets include liquid hydrogen & LOX, which stands for this Liquid oxygen 300 September 19, 2000
This tusked pinniped has air sacs in its neck enabling it to keep its head above water while sleeping Walrus 400 September 19, 2000
This 16th century professor at the University of Padua is called the "Father of Modern Anatomy" Andreas Vesalius 500 September 19, 2000
Our sun is classified as the yellow type of these "small" stars Dwarfs 100 February 24, 2000
Like those of the genus Malus, most wild apples are of this tart "crustacean" type Crabapples 200 February 24, 2000
Of 6,000, 66,000 or 666,000 MPH, the closest to the speed of the Earth around the sun 66,000 300 February 24, 2000
2 of the 4 stages of development for most insects Egg, larva, pupa, adult 400 February 24, 2000
The adult human brain is made up of more than 10 billion of these nerve cells Neurons 500 February 24, 2000
The leaves of a fern are commonly called this, from the Latin for "foliage" Fronds 100 January 20, 1998
The "fire" type of this insect builds large mounds that interfere with harvesting hay fire ants 200 January 20, 1998
A perihelion is the point in the orbit of a planet or other celestial body when it's closest to this sun 300 January 20, 1998
Mildews, smuts & morels belong to this group of organisms incapable of making their own food Fungi 400 January 20, 1998
This phylum of sea animals named for their spiny skin includes sea urchins & sea cucumbers echinoderms 500 January 20, 1998
The patellar reflex is an involuntary reaction of this joint Knee joint 100 January 13, 1998
Most of a cell's water passes through the plasma membrane by this process Osmosis 200 January 13, 1998
Unlike the German species, the Asian variety of this kitchen insect is actually attracted to light Cockroach 300 January 13, 1998
Paramecia & amoebas are types of this single-celled organism Protozoans/protists 400 January 13, 1998
In 1686 this English astronomer became the first to publish a meteorological chart Edmond Halley 500 January 13, 1998
Launched on April 24, 1990, it was the first general-purpose orbiting telescope Hubble Space Telescope 100 June 30, 1997
Fog may form when air cools to this "point" or when moisture is added to air near the ground Dew point 200 June 30, 1997
Cinnamon & cork are obtained from this part of a tree Bark 300 June 30, 1997
This tusked pinniped takes clams into its mouth & sucks the flesh from the shell Walrus 400 June 30, 1997
In the 1550s Fleming Ogier de Busbecq introduced this garden flower to Europe from Turkey Tulip 500 June 30, 1997
The ball form of this weather phenomenon is also known as kugelblitz lightning 100 June 6, 1997
In a leaf this food-making process takes place in the palisade & spongy cells photosynthesis 200 June 6, 1997
The name of this treeless Arctic zone comes from a Lapp term for "hill" tundra 300 June 6, 1997
The order Sirenia consists of 4 living species: the dugong & 3 species of this animal the manatee 400 June 6, 1997
The Russian thistle is a species of this plant blown about the prairies tumbleweed 500 June 6, 1997
The Columbia, one of these between Valdez & Anchorage, Alaska can move about 65 feet per day Glacier 100 January 24, 1997
In 1909 Dutch botanist Wilhelm Johannsen first proposed this name for the unit of heredity in living things Gene 200 January 24, 1997
The largest living reptile is probably the saltwater species of this animal, which may weigh more than a ton Crocodile 300 January 24, 1997
This Russian physiologist's major published work was "Conditioned Reflexes" in 1926 Ivan Pavlov 400 January 24, 1997
His first law of planetary motion states the planets' orbits are ellipses with the sun at one focus Johannes Kepler 500 January 24, 1997
This basic state of matter has no fixed volume or fixed shape Gas 100 January 7, 1997
In a rainbow this color appears between blue & violet Indigo 200 January 7, 1997
North American types of this bird include Montezuma, mountain & bobwhite Quail 300 January 7, 1997
In 1928 physicist Walther Muller helped this man improve his radiation detector Hans Geiger 400 January 7, 1997
Photosynthesis takes place in these specialized structures in the cells of plants Chloroplasts 500 January 7, 1997
It's the largest & most economically important family of conifers pine 100 December 2, 1996
This term refers specifically to a tornado that forms over a lake or ocean waterspout 200 December 2, 1996
This bird, "laughing jackass", is often heard on soundtracks to represent jungle sounds kookaburra 300 December 2, 1996
Nelumbo nucifera is the scientific name of this sacred flower of Buddhism lotus 400 December 2, 1996
In 1920 Betelgeuse in this constellation became the first star whose size was measured Orion 500 December 2, 1996
It's the force that gives us weight & prevents us from floating into space gravity 100 December 29, 1995
Though painful, the bite of these largest spiders usually isn't fatal tarantula 200 December 29, 1995
It's a colorful flower, or the colored part of the eye an iris 300 December 29, 1995
Luther Burbank specialized in this science of cultivating plants & flowers horticulture 400 December 29, 1995
This chemical element makes up the hardest substance known in nature carbon 500 December 29, 1995
All algae contain this green pigment that allows them to perform photosynthesis chlorophyll 100 May 18, 1992
It's a piece of metal put in an electrical circuit to melt if current flow is too high a fuse 200 May 18, 1992
The fastest flying animal is the peregrine species of this bird of prey a falcon 300 May 18, 1992
The Weddell species of this sea mammal can stay underwater for over 40 minutes a seal 400 May 18, 1992
In the night sky, Jupiter is the third brightest of the stars & planets, after these two Mars & Venus 500 May 18, 1992
The explosive trinitrotoluene is commonly abbreviated this TNT 100 February 5, 1992
Like caterpillars, spiders have spinning glands which produce this fiber silk 200 February 5, 1992
The simplest form of spectroscope incorporates one of these objects to split the spectrum prism 300 February 5, 1992
A pyroclastic rock is formed from fragments thrown into the air by one of these volcanic explosion 400 February 5, 1992
Some scientists believe that the spiral tusk on this Arctic whale helps it attract mates narwhal 500 February 5, 1992
This second-lightest gas has the lowest boiling point of any element helium 100 September 30, 1991
Because it lives & feeds on other trees, mistletoe is classified as this parasite 200 September 30, 1991
It's the process by which a snake sheds its skin or a deer its antlers molting 300 September 30, 1991
This Latin word for fig is also the name of the genus to which it belongs Ficus 500 September 30, 1991
Until the discovery of Uranus in 1781, this was the outermost planet known Saturn September 30, 1991
It's the general term for a poisonous or bad-tasting mushroom a toadstool 100 September 20, 1991
The opposite of perigee, it's the point at which the moon is farthest from earth apogee 200 September 20, 1991
Dry ice is made by cooling & compressing this gas carbon dioxide 300 September 20, 1991
Rather than bone, a shark's skeleton is made up of this elastic tissue cartilage 400 September 20, 1991
Erythrocyte is the scientific name for a red blood cell & this is the term for a white one leukocyte 500 September 20, 1991
Taste buds are usually divided into 4 types, salt, acid, bitter & this sweet 100 July 18, 1991
A red corundum is a ruby, a blue corundum is this a sapphire 200 July 18, 1991
If you're running from one of these, the largest of all monitor lizards, remember they can climb trees a Komodo dragon 300 July 18, 1991
According to the 3rd law of thermodynamics, a body can't be brought down to this temperature absolute zero 400 July 18, 1991
Rock crystal is a colorless variety of this mineral, & amethyst is the purple variety quartz 500 July 18, 1991
The brightest star of a constellation is often designated by this Greek letter alpha 100 May 20, 1991
The glass used in most windows is made from a mixture of lime, soda & this sand 200 May 20, 1991
While an aviary is a place to keep birds, an apiary is for these creatures bees 300 May 20, 1991
When the Moon is in a quarter phase, these lowest ocean tides occur neap tide 400 May 20, 1991
The amoeba is an example of these 1-celled organisms whose name is Latin for "first animals" protozoa 500 May 20, 1991
The retinal cells used for night vision are rods, & these are used for reading & color perception cones 100 July 9, 1990
Partly decayed plant matter commonly used as a fuel in Ireland peat 200 July 9, 1990
World Book says experimenting with this force, Ben Franklin knocked himself unconscious at least once lightning (electricity) 300 July 9, 1990
Wings appear for the first time during this stage of insect development between larval & adult stages pupal 400 July 9, 1990
Both freshwater & "sea" varieties of this mammal belong to the weasel family otter July 9, 1990
Trade name for plastic used as protective layer on "non-stick" kitchen utensils Teflon 100 December 6, 1985
An unlimited extent of space, time or quantity, as in numbers that go on "forever" infinity 200 December 6, 1985
A short story by Franz Kafka, or the life story of a butterfly <i>Metamorphosis</i> 300 December 6, 1985
1st called this in 19th c., branch of biology dealing with inter-relationship of organism & environment ecology 400 December 6, 1985
Why a straw standing in a glass of water looks like it's broken at the water's surface refraction 500 December 6, 1985