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Science

The observation, identification, description, experimental investigation, and theoretical explanation of phenomena is all part of science. Nothing is immune to the scientific process: from charm quarks that haven't existed naturally since the beginning of time to Pluto, recently demoted from planet to dwarf planet. Questions on knowledge about the material and physical aspects of our world are asked and answered here.

203,801 Questions

What tools do you use to observe objects in space?

Telescopes, both ground-based and space-based, are the primary tools used to observe objects in space. These telescopes can observe different wavelengths of light, such as optical, radio, and X-ray, to gather information about celestial objects. Other tools, like spectrographs and cameras, are often used in conjunction with telescopes to analyze the data collected.

What is the full form of KHTML?

KHTML is the HTML layout engine developed by the KDE project. It is the engine used by the Konqueror web browser. A forked version of KHTML called WebKit is used by several web browsers, among them Safari and Google Chrome. Distributed under the terms of the GNU Lesser General Public License, KHTML is free software.

Is the arctic poppy poisonous to humans?

From what I've found, it is, but it's toxicity is low. It shouldn't kill you unless you eat a lot.

Some links to check out:

http://gardening.about.com/od/choosingperennialplants/ig/Perennials-for-New-Gardeners/Papaver-nudicaule--Poppies-.htm

http://www.pfaf.org/database/plants.php?Papaver+nudicaule

http://www.ecokids.ca/pub/eco_info/topics/field_guide/plants/arctic_poppy.cfm

Did explors use compasses to find their way or did they have other stragies?

Explorers used compasses as a primary tool for navigation, especially at sea where landmarks were not always visible. In addition to compasses, explorers also used celestial navigation, maps, and landmarks to find their way. Each method had its strengths and limitations, and explorers often combined multiple strategies to ensure accurate navigation.

What is the most recognizable physical feature of the male lion?

The lion's mane (the thick fur around the neck) is the most easily identifiable feature of the male lion. It can be used to intimidate enemies, since the mane makes the lion appear larger.

Which star is brighter -2 or -3?

The way stellar magnitude works, a smaller number is associated with increased brightness. Since -3 < -2, a magnitude -3 star would be brighter than a magnitude -2 star. Each decrease in magnitude by 1 means in increase in brightness by a factor of about 2.5119. Equivalently, each decrease in magnitude by 5 means an increase in brightness by a factor of 100.

Incidentally, the brightest star in the sky (Sirius) has an apparent magnitude of only about -1.5.

What does the size of a galaxy mean?

The size of a galaxy refers to its physical dimensions, typically measured in terms of its diameter or radius. Larger galaxies can contain billions to trillions of stars, while smaller galaxies may have fewer stars. Galaxy size can also provide clues about its age, structure, and evolutionary history.

Are cloudy nights usually warmer or colder than clear nights?

Cloudy nights are usually warmer than clear nights because clouds act as a blanket, trapping heat emitted from the Earth's surface. This phenomenon prevents heat from escaping into the atmosphere, resulting in higher temperatures during the night.

What is the densest object in space?

A neutron star is one of the densest objects in space. They are formed when a massive star collapses and its core is compressed into a small, incredibly dense object composed mostly of neutrons. Neutron stars can have densities comparable to the density of an atomic nucleus.

How much people can a space station carry?

This is a very arbitrary question, as it depends on the size/capabilities of said station. The ISS can carry a crew of seven at a given time. However, a station COULD be constructed to carry a crew of indefinite size.

How did the suns energy change over time?

The sun's energy has increased steadily over time due to nuclear fusion reactions in its core. As the sun burns hydrogen to helium, it releases energy in the form of light and heat. It is estimated that the sun will continue to increase in energy output over the next billion years before entering the red giant phase.

Examples of mutualism and why?

an example of mutualism could be an oxpecker and a rhino. The birds peck and eat little insects on the rhino's back for food. The rhino then has harmful insects removed because of the birds. Also, rhinos have bad eyesight. When the birds see danger they fly away which warns the rhino (because it can feel the birds lifting off) that danger is near.

Why are scientific journals important to scientific progress?

They are a good way for scientists to share their findings. This allows for other scientists to do the same experiment and confirm or disprove those findings. It also allows scientists to use what has already been tested in their own studies that go beyond what was already proven.

What reactions do rockets have in space?

Rockets in space follow Newton's third law of motion, generating thrust by expelling mass in one direction to create an equal and opposite reaction in the opposite direction, propelling the rocket forward. Additionally, rockets can perform maneuvers in space by adjusting the direction and speed of their exhaust gases to control their trajectory.

What is a useful scientific name must have two characteristics?

A scientific name must have the Genus then the species. The genus is always capitalized and the species is lower case. If it is typed it must be italicized and if it is written it must be underlined.

Example: Homo sapiens

Which animals might find their way using earth magnetic fields?

There are many animals that are thought to use magnetic fields in their navigation.

Birds

Tortoises/Turtles

Dolphins

Probably something they use without actually thinking about it.

What does the word field investigation mean?

field investigation is literally investigations done in the field. This can be, for example, a geologist studying a volcano by going to it's summit, taking readings, measurements, and observations. Or it could be a biologist traveling to Africa to study lions and zebra in their natural habitat.

Does sun give off more heat in the summer?

No, the sun does not give off more heat in the summer. It only seems hotter because the axis of the Earth, that you are on, is now pointed closer to the sun, where as in winter you are actually farther from the sun, since the axis is pointed in the other direction, and therefore you do not experience the same warmth as in summer.

What colors can cats eyes be on the road?

Cats eyes can be any colour, but the colours normally used on public roads in the United Kingdom (possibly different in other countries) are white between lanes, red to mark the left edge of the road and green Is commonly used to mark where a slip road leaves or joins.

When was cats eyes invented on the road?

Cats eyes were invented in the 1930s by Percy Shaw, a British inventor. He came up with the idea while driving in foggy conditions and noticing how the reflection of his car's headlights in a cat's eyes helped him navigate the road.

Why does sunlight makes your skin dark?

Sunlight exposure causes the skin to produce more melanin, a pigment that gives skin its color. This is the body's natural defense mechanism to protect against UV radiation and prevent sun damage. The increased melanin production leads to a darker skin tone, known as a tan.

What is the building block in a protein?

The building blocks of proteins are amino acids. Amino acids are organic compounds that contain an amine group, a carboxyl group, and a unique side chain. There are 20 different amino acids that can be combined in many different sequences to form proteins.

Who sang cold water surrounds you on Stella sky 1?

The song "Cold Water Surrounds You" on Stella Sky 1 was performed by the band Kye Kye.

Why does your stomach have a weird feeling during a flight?

During a flight, the change in cabin pressure can cause gases to expand in your stomach and intestines, leading to bloating and discomfort. Additionally, the vibrations and movements of the plane can contribute to feelings of nausea or queasiness. It's also common for some people to experience motion sickness due to the turbulence.

How is stars brightness measured from earth?

Astronomers use a special term to talk about the brightness of stars. The term is "magnitude". The magnitude scale was invented by the ancient Greeksaround 150 B.C. The Greeks put the stars they could see into six groups. They put the brightest stars into group 1, and called them magnitude 1 stars. Stars that they could barely see were put into group 6. So, in the magnitude scale, bright stars have lower numbers.