Math and Arithmetic
Elements and Compounds
Botany or Plant Biology
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.
What instrument measures mass?
Traditionally a balance was used to measure mass. Objects of known or accepted mass was balanced against another object of unknown mass. When the balance was level the two pans had the same mass. The term balance or scales is still used even though there is no balance used. The scales were the pans that the objects sat on. Now electronic balances are used that gauge the mass of the objects. While you can measure mass with a spring loaded scale, it is...
Asked in Science, Scientists
What is the scientific attitude and what attitudes and characteristics define a good scientist?
A good scientist should possess the following qualities: 1. A scientist must be curious about the world Example: Galileo Galileo's curiosity about the heavenly bodies made him the first person to use a telescope to study the moon, the sun, the planets and the stars. 2. A scientist is logical and systematic Example: Among the reasons why Gregor Mendel discovered the principles of heredity when others have failed was his logical experimental methods and his careful and accurate record keeping. 3. A scientist is open-minded...
Asked in Science, Earth Sciences
What is the rock cycle song?
SEDIMENTARY rock Has been formed in layers Often found near water sources With fossils from decayers Then there's IGNEOUS rock Here since Earth was born Molten Lava, cooled and hardened That's how it is formed These two types of rocks Can also be transformed With pressure, heat and chemicals METAMORPHIC they'll become (sung to the tune of row row row your boat) (=**=) (<cat lol) ...
Asked in Science, Chemistry, Acids and Bases
What are some examples of chemical and physical changes?
Physical Changes Change of state (such as from solid to liquid or from gas to liquid) Specific examples of state change include water freezing, alcohol evaporating and dry ice (solid carbon dioxide) subliming Absorption of water into a towel Crumpling a piece of paper Pulling copper into a thin wire - a change of shape, but not a change of composition Cutting a material such as wood Tearing a piece of tin foil Breaking glass Deflating a basketball Mixing different solids (such as solid sulfur and iron filings) Inflating a volleyball Cloud...
Asked in Science, Atomic Mass
What is gold's mass number?
The only stable, and only naturally-occurring isotope of gold has mass number of 197. This is the number of protons and neutrons in each nucleus. Gold's atomic number is 79. This is the number of protons found in each gold atom. This determines its place in the periodic table, and its chemical properties: it is the defining property of gold. A nucleus with a different number of neutrons and the same 79 protons would be a different isotope with a different mass number; a...
Asked in History of Science, Science, Superstitions
What superstitious beliefs have a scientific basis?
Superstitious belief, by definition, have no scientific basis. Science requires that ideas are tested in a way that is repeatable and falsifiable. Falsifiable means that there must be a way that the test shows that a stated belief is not true, while most superstitions rely on metaphysical entities or powers that are so vague they can not be dis-proven. Here are some examples of superstitions, and where they may have come from. Breaking a mirror is seen as seven years of bad luck from...
Asked in Science, Urinary System
What are the tubes called that carry urine away from the kidneys to the urinary bladder?
As I believe has already been stated the Ureters, which are also the source of blockages from kidney stones. Not where they come from that is but where stones large enough usually 5 mm can cause blockages. 2 and 3 even 4 mm stones csn take up to 45 days to pass but usually do. The danger is if stones are present in both Ureters and are causing blockages then the urine can back...
Asked in Science, Earthquakes, Plate Tectonics
What is the process that powers plate tectonics?
Convection, as heat from the mantle is transferred to the lower crust, which can move very slowly in response to the increased upward pressure. The heat makes the rock liquid (magma) in some areas, allowing it to flow upward to the surface, thus creating spongebob squarepants! ...
Asked in Science, Cooking Equipment
Why is the pan handle made of plastic?
The first and last answers simply are not correct, nor do they answer your question. The second, middle question is much better, but it does not fully answer your question either. If a metal pan with a plastic handle is put in the oven at, let's say, 350 deg., then the temperature of the entire pan, metal and plastic, will eventually reach 350 deg. It is not true that the plastic won't get hot, actually it should heat up faster than...
10 examples of physical change and chemical change?
Physical Change: *Milo dissolves into hot milk *A plate is dropped and shatters *Grass in mowed *Metal Knife is sharpened *Breakfast Cereal goes soggy Chemical Change: *Wood burns to form black charcoal * A green tomato ripens and turns red * Fireworks explode to form colourful light and loud sounds * Vegetables scraps in the compost bin decompose to form rich soil * An egg is cooked to become a white and yellow solid ...
What is an alternative to bicarbonate soda?
Depends on what reciepe you are using and what the purpose is: I often use yeast but in some recipes depending on the fluffiness of the cake I will sometimes use baking soda. A friend of mine uses "fizzy water" (carbonated water) as an alternative. Yeast is only used in bread related recipes, whereas bicarb can be used n cakes ~ Baking Soda in a recipe is to help with 'spreadability of the cookie or cake. You don't use it in pancakes so...
Asked in Science, Physics, Chemistry, Chemical Bonding
Why does water have a high and specific heat capacity?
First, we need to know a little bit about water. Water is a polar molecule because oxygen bears partial negative charge and hydrogen bears partial positive charge. This results in extensive hydrogen bonding in water molecules between slightly negative oxygens and slightly positive hydrogens. Second, we need to remember that temperature is another way of saying the average kinetic energy of particles - the higher the temperature, the faster they move, in the case of gases and liquids, or vibrate, in the case of...
Asked in Science, Biochemistry, Reference Books
Could somebody suggest some good books on biochemistry to read to put on personal statement?
Lehninger's principles of Biochemistry.. Voet and Voet, Biochemistry Elliot and Elliot, Biochemistry and Molecular Biology ...
Asked in Chemistry, Science, Sports
Why is science defined as a product and a process?
This is because science is not just the information presented (the product), but also the way in which that information has been collected (the process). While scientific knowledge should be testable and falsifiable (according to Karl Popper), the way in which such information has been gathered is also important. Science should be unbiased and experiments should be repeatable by different individuals. There are different philosophers who argue on the way science proceeds. (see Popper, Kuhn, Lakatos and Feyerabend) ...