Hall of Presidents
The media for presidential imagery has ranged everywhere from the traditional oil-on-canvas and marble to cotton handkerchiefs and sewing-box lids, and the Gallery houses today a richly varied array of presidential likenesses. In the selection of portraits on view here, some are more sophisticated and striking than others; some are quite rare or altogether unique; some are calculated to impress us with their gravity while others are warmly intimate. Taken collectively, however, they all have one
You Be the Conservator
This web activity, recommended for grades 5 and up, is designed to teach both content and process. The content areas addressed in this activity are the science of conservation and the history of the Hispanic American tradition of making santos. Santos are painted woodcarvings of saints in the Catholic Church. Conservators use scientific tools and procedures such as xeroradiography and microscopy to analyze objects. The science behind these tools and procedures is explained in this web activity.
This is an exhibit that features the works of French artists who painted in the time of Napoleon. With the revolution, French painting resumed its moral and political purpose and embraced the style known as neoclassicism. After 1789, artists increasingly sought noble themes of public virtue and personal sacrifice from the history of ancient Greece or Rome.
Gümnaasiumibioloogia õppekava 1., 2. ja 3. kursuse (IV kooliaste) teemadele vastavate küsimuste koostamisel on silmas peetud õpilase kõrgemate mõtlemistasandite arendamist, aga ka põnevama ja mõtlemapaneva teabe lisamist. Nii oodatakse küsimustepanga ülesannete lahendajalt infost arusaamise, selle rakendamise ja seostamise, analüüsimise ja sünteesimise ning bioloogiliste protsesside toimumiskäigu prognoosimisoskust.
TÜ Loodusteadusliku hariduse lektoraadi vastavatel kursustel (Loodusteaduste visualiseerimine) osalenud õpetajate koostatud interaktiivsed mudelid bioloogiliste protsesside tundmaõppimiseks. Kuigi mudeleid ei saa lugeda lõplikult viimistletuks, on nad õppeprotsessi visualiseerimiseks asjakohased: kasvõi ideede saamiseks. Kasutajal on soovitav fail enne oma arvutisse salvestada ning vajadusel täiendada.
Calisphere Themed Collection - 1950s-1970s: Social Reform: Everyday Life
The images in this topic provide a glimpse into the daily lives and changing lifestyles of Californians during the 1950s, 60s, and 70s, as the country moved from postwar to protest. From birthday parties and family meals to homecoming rallies and political protests, these photographs reflect how life looked during those years. Two images show Californians interacting with political figures who shaped those decades.
Calisphere Themed Collection - 1929-1939: The Great Depression: Everyday Life in Hard Times
The images in this topic provide a look at the everyday lives of Californians during the decade of the 1930s. Although many people struggled to survive during the Great Depression, these photographs also show that some still found employment, and many managed to enjoy themselves despite the hard economic times.
Calisphere Themed Collection - 1780-1880: California in Transition: Early California Exploration and
California has always been a place of cultural interaction. Early California evolved and changed with each new group of settlers. These images depict the developing interconnectedness of California's early cultures. They also underscore the importance of movement and later settlement of peoples in California. Some of the modern images underscore the contested and often romanticized nature of California’s Spanish and Mexican heritage. This is a collection of primary source images.
One reason why caecilians are considered to be amphibians is because they go through metamorphosis to reach adulthood. Caecilians are unique amphibians because some of them lay eggs, but some of them give birth to live young.
Breathing tube of a mosquito larvae
The breathing tube is one organ of the respiratory system (along with the lungs in animals). The breathing tube allows for the intake of oxygen and the disposal of carbon dioxide.
Boy on trampoline
The boy would feel less secure if the safety net around the trampoline wasn't there. Humans have an innate need to feel secure in their environments.
Blooming prickly pear cactus (Opuntia) from the Sonora desert
Cacti are often overlooked as flowering plants. In fact, cacti bloom with colorful flowers and reproduce like all other angiosperms.
Bee on flower
Bees visit flowering plants to collect nectar so they can store it as honey back at their hives. As a bee visits one flower after another, pollen collects on its entire body and especially on the legs. Bees help pollinate flowers while they collect nectar. This is a mutualistic behavior.
Basic Needs: U.S. currency
Humans need to feel financially safe and stable.
Balance and flux
Ecosystems and populations of organisms within ecosystems function by the principle of balance and flux. Balance can be thought of as a state of equilibrium, or a state of equal changes between two sides. Flux can be thought of as a rate of flow or changes. Even small changes in an ecosystem's or population's balance and flux could lead to disaster.
One reason why ticks are considered to be arachnids is because they do not have antennae like insects do. Ticks suck blood from animals and are sometimes difficult to remove from the host's skin.
Fly on a leaf
Flies are insects that eat dead plant and animal material. Their ingestion and digestion of detritus leads to respiration and excretion of important nutrients back into the soil and water.
3D Global Methane
An animation of the three-dimensional structure of global methane evolving over time, from a global data assimilation model
Arctic Ozone from February 1, 2003 through March 30, 2003
This visualization shows the northern hemisphere ozone hole from February 1, 2003 through March 30, 2003.
West Africa Dust Storms
On the Coast of West Africa, dust storms are a common occurrence, if you take a look at this one, its about the size of Spain.