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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.
471,801 Questions
Boiling waters idepended variable?
- 59 answers
No, an independent variable is something that changes in an experiment.
The forces of attraction between two objects varies with what two factors?
- 24 answers
Depends on the force but for gravity the answer is mass and distance.
Are snails and butterflies in the same phylum?
- 21 answers
Not at all, butterflies are from the phylum Arthropoda and snails are in the phylum Mollusca.
What are the abiotic components of the nitrogen cycle?
- 5 answers
There are currently a large number of well-characterized, ischemic stroke animal models available for pre-clinical research. For stroke studies, Acroscell provides studies for neuroprotection and reduction of infarct, as well as longer-term, more comprehensive studies looking at functional and cognitive outcomes or stroke prevention. In Acroscell, all studies can be customized and adjusted to meet client needs.
What is the fourth element of the periodic table of elements?
- 36 answers
Beryllium (Be)
See the Web Links and the Related Questions for more information.
Is silence a sound?
- 113 answers
According to Merriam-Webster, the definition for silence is:
"1: forbearance from speech or noise2: absence of sound or noise"What instrument measures mass?
- 16 answers
A Beam balance (or Beam scale) is a device to measure weight or mass.
Given unlimited resources, what scientific or medical problem would you investigate?
- 41 answers
What are the 5 oceans of the world?
- 17 answers
Arctic Ocean, Atlantic Ocean, Indian Ocean, Pacific Ocean, Southern Ocean
What is gold's mass number?
- 7 answers
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 nucleus with a different number of protons would not be gold, but some other element.
What is the scientific attitude and what attitudes and characteristics define a good scientist?
- 3 answers
I believe you can refer to experts at MyAssignmentHelp to get the precised answer.
How many times does 3 go into 100?
- 27 answers
100 ÷ 3 = 33.33 recurring.
Or 100 ÷ 3 = 33 remainder 1.
What are some examples of chemical and physical changes?
- 4 answers
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 forming in the sky
Chemical changes
- Burning a log of wood
- Mixing an acid with a base, producing water and a salt.
- Photosynthesis - a process in which carbon dioxide and water are changed into sugars by plants.
- Cracking heavy hydrocarbons to create lighter hydrocarbons (part of the process of refining oil).
- Cooking examples: popcorn, cake, pancakes, and eggs
- Oxidation examples: rust or tarnishing
- Combustion
- Mixing chemicals
- Rotting of fruit
- Cooking rice
- Explosion of fireworks
- Tarnishing silver
- Lighting a match
- Chewing/digesting food
- Rusting nail
- Burning gas in a stove
- Oxidizing food for energy
- Roasting a marshmallow
- Adding food coloring to icing
- Frying an egg
- Burning a magnesium strip
The following can indicate that a chemical change took place, although this evidence is not conclusive:
- Change of color (for example, silver to reddish-brown when iron rusts)
- Change in temperature or energy, such as the production (exothermic) or loss (endothermic) of heat
- Change of form (for example, burning paper)
- Light, heat, or sound is given off
- Formation of gases, often appearing as bubbles
- Formation of precipitate (insoluble particles)
- The decomposition of organic matter (for example, rotting food)
What is the rock cycle song?
- 1 answer
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)
(=**=) (
What are the tubes called that carry urine away from the kidneys to the urinary bladder?
- 5 answers
ureter carry urine towards urinary bladder from kidney
What superstitious beliefs have a scientific basis?
- 3 answers
As of 2007 Atheism has been proven to be a religion with zero honesty or truth! Atheism is all fiction; confirmed by honest scientific tests! The Atheists have also lost in the Supreme Court! God won!
Every single sentence of history in the honest Bible has anywhere from three to over 250 records found to confirm each line! The Bible is all truths, facts!
What determines whether you are left or right handed?
- 20 answers
Scientists aren't entirely sure, although they're pretty positive it's genetic. For a long time, a prevailing theory was that handedness is determined by gene expression in the left or right hemisphere of the brain. However, newer research suggests that even before the motor cortex is developed, an early asymmetry in the spinal cord is actually what determines right or left handedness.
Is the independent variable the thing you change?
- 1 answer
Yes
The independent variable is also known as the manipulated variable.
In an experiment where you need to test different objects, the independent variable would be the different objects.
If we can't tunnel through the Earth, how do we know what's at its center?
- 15 answers
First, scientists are pretty sure the Earth's core is about 80 percent iron. How they know that is a series of educated guesses.
For starters, they can be reasonably sure of the planet's mass based on its gravitational pull. The material on the surface isn't dense enough to match up with that mass, so the rest of the Earth has to be much denser.
Iron, meanwhile, is one of the most prevalent elements in the universe, but it isn't all that evident in the Earth's crust. Since scientists would expect more iron to be in our planet and it's a fairly dense element, that leads to the conclusion that the Earth's core is mostly iron. They theorize that it was pulled to the core over millions of years. By examining different seismic waves, they know that the inner part of the core is solid and the outer core is molten.It's a lot more scientific than I've made it sound, but hopefully that gets at the gist of it.
Why is the pan handle made of plastic?
- 3 answers
Because the plastic is the poorest conductor of heat (That means it doesn't heat up when it touches something that's hot). Metal is a great conductor of heat though, so if the handle were made of metal we would burn our hand whenever we touch the handle.
10 examples of physical change and chemical change?
- 3 answers
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
Does Coke stop your growth?
- 3 answers
yes
What is the process that powers plate tectonics?
- 1 answer
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!
Convert centigrade to Fahrenheit?
- 25 answers
F to C: Deduct 32, then multiply by 5, then divide by 9
C to F: Multiply by 9, then divide by 5, then add 32
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