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Science Knowledge Quiz

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IronWing said:
All the other choices involved time. Time was not on the graph.

Edit: Forgot the teeth brushing choice So two involved time and one involved a behavior not on the graph.
Click to expand...

I agree the answer they wanted was obvious, however, I disagree the conclusion of such could be made simply by the graph. Tooth decay has many variables, one of which might be sugar consumption.
 
Ken g6 said:
12/12. I had issues with several questions. Putting the issues in spoiler tags because they also give the answers.

4:
Gravitational pull creates tides, but without the rotation of the Earth on its axis, the tides wouldn’t move, so there would be no local “tides” moving up and down. (Except that the sun and the moon don’t move together, so at least one would create slow-moving tides, depending on whether you really mean “not rotating”, or “tidally locked”.)

5: Einstein would complain that a light-year also measures
time
. (Considering his
light clock
thought experiments and all.)

8: Sounds waves don’t have a “
height
”, except in bad textbook representations. They’re compression waves, not transverse waves.
Click to expand...

4: not exactly.
all 3(sun/moon/rotation) affect the tides. the spin of the earth creates at centrifuge effect making the oceans rise near the equator due to more angular velocity. this also causes the water level to drop near the poles. the question hinges on which of the 3 has the greatest effect. the answer in that situation is the moon due to proximity, though the sun's gravity effect on the tides is pretty close to even when earth is between the 2 of them.
knowing the exact values of Gsun Gmoon and earth rotation effects and comparative relationships arent something you will encounter outside of a college level astronomy class however.
 
Ken g6 said:
12/12. I had issues with several questions. Putting the issues in spoiler tags because they also give the answers.

4:
Gravitational pull creates tides, but without the rotation of the Earth on its axis, the tides wouldn’t move, so there would be no local “tides” moving up and down. (Except that the sun and the moon don’t move together, so at least one would create slow-moving tides, depending on whether you really mean “not rotating”, or “tidally locked”.)

5: Einstein would complain that a light-year also measures
time
. (Considering his
light clock
thought experiments and all.)

8: Sounds waves don’t have a “
height
”, except in bad textbook representations. They’re compression waves, not transverse waves.
Click to expand...
Would you like some whine with your cheese? You failed and still won't own up to the fact you are a failure, a symptom of why this country is fucked.
 
Ken g6 said:
12/12. I had issues with several questions. Putting the issues in spoiler tags because they also give the answers.



4:
Gravitational pull creates tides, but without the rotation of the Earth on its axis, the tides wouldn’t move, so there would be no local “tides” moving up and down. (Except that the sun and the moon don’t move together, so at least one would create slow-moving tides, depending on whether you really mean “not rotating”, or “tidally locked”.)



5: Einstein would complain that a light-year also measures
time
. (Considering his
light clock
thought experiments and all.)



8: Sounds waves don’t have a “
height
”, except in bad textbook representations. They’re compression waves, not transverse waves.
Click to expand...


The moon and sun are not geostationary relative to Earth. They would continue to move around if the earth stopped spinning in relation to another point outside these bodies. The tides would continue.

A light year does not measure time, not even when considering relativistic effects. The "year" part is relative to our year and only our year. That's a pre-defined measurement.
 
DrPizza said:
Your complaint about uranium/plutonium is akin to saying, "we don't need trees to build houses, because we use wood." In other words, look up where Plutonium is mined - it isn't. It only exists in trace quantities naturally. That which is used is of man-made origin, generally using Uranium as the main ingredient. (bombarding with either deuterium nuclei, else neutrons, producing another isotope of Uranium, else Neptunium, respectively. Each decays via beta minus decay(s) to either Plutonium 238 or Plutonium 239.

edit: and of course, 12/12
Click to expand...

Also, Plutonium isn't an available answer.
Sodium Chloride
Uranium
Nitrogen
Carbon Dioxide

are the choices, pretty easy to narrow down.
 
mmntech said:
Do 34% of people really not know that water boils at a lower temperature at higher altitude. That's 6th grade science. It's also why you can never get a decent cup of tea on an airplane.
Click to expand...

lxskllr said:
11/12 Got the boiling water wrong. Never experienced it, and didn't give it enough thought.
Click to expand...
At least i'm in good company. I missed that one too. I knew it boiled at a different temperature but couldn't remember if it was higher or lower.



smackababy said:
Also, astrology isn't a science.
Click to expand...
As a long time astronomy buff i still get (confused? perplexed? - not sure what word to use) when people think i use a crystal ball & tarot cards :\
 
DrPizza said:
Since both answers were there, I think it's implied, [visible]light waves. 🙂 Otherwise, I agree; and obviously, one answer is more correct than the other.
Click to expand...
Well, they're both electromagnetic waves propagated by photons but occupy different parts of the EM spectrum. It seems they are using the names for different parts of the spectrum.
 
gorcorps said:
You should be able to get the polio vaccine one by process of elimination alone. If somebody asked me who invented the polio vaccine, I wouldn't know... but given multiple choices where 3 out of the 4 are obviously wrong it should be easy.

Or are you saying you really didn't know what Marie Curie, Einstein, and Isaac Newton were involved with?
Click to expand...

i didn't even get that far .. i stopped when i read the question.
but i take your point.
 
mmntech said:
12/12

Do 34% of people really not know that water boils at a lower temperature at higher altitude. That's 6th grade science. It's also why you can never get a decent cup of tea on an airplane.
Click to expand...
The quality of your posts of late has been reflecting my own thinking processes. You should get that looked at. :awe:

And if anyone has ever made box mix baked goods, there are high altitude directions almost always included.
 
smackababy said:
I agree the answer they wanted was obvious, however, I disagree the conclusion of such could be made simply by the graph. Tooth decay has many variables, one of which might be sugar consumption.
Click to expand...

Looking at the data I believe most undergraduate statisticians would draw a conclusion that tooth decay has many variables, one of which is sugar consumption. A Mann-Kendall and/or a Theil-Sen trending test I believe would give at least 95% confidence and you could supplement that conclusion with a simple OLS Regression line.

Since I don't have access to the data I can't say for sure but I've looked at enough graphs to strongly suspect, an undergraduate statistician would draw that conclusion. Remember this is statistics, you don't have reach a 100% confidence level;

I, like you, am skeptical. I would most likely want some sort of time series evidence that concluded that over time in and country that had increased consumption over a long period of time but unless you can account for the variation between countries, I would agree with you, the graph in the test only suggests that rate of tooth decay may be influenced by sugar consumption.

Lies, Damn Lies and Statistics

By the way, the off cited Disraeli wasn't the first to identify in speech or print, the three kinds of lies.
 
11/12 - I got the magnifying glass question wrong. I didn't think that question was presented very well. The confusion was between 2 and 3, and I picked 2 because that's the image that looked to me like it was magnifying.

Question #12 wasn't a science question, because Astrology isn't considered by most to be a real scientific field. Its based purely on speculation and superstition. Its about as scientific as religion is.
 
Last edited:
Ken g6 said:
12/12. I had issues with several questions. Putting the issues in spoiler tags because they also give the answers.

4:
Gravitational pull creates tides, but without the rotation of the Earth on its axis, the tides wouldn’t move, so there would be no local “tides” moving up and down. (Except that the sun and the moon don’t move together, so at least one would create slow-moving tides, depending on whether you really mean “not rotating”, or “tidally locked”.)

5: Einstein would complain that a light-year also measures
time
. (Considering his
light clock
thought experiments and all.)

8: Sounds waves don’t have a “
height
”, except in bad textbook representations. They’re compression waves, not transverse waves.
Click to expand...

We're not talking about one usage during one experiment.

So AM radio should be called CM radio? 😡 Every wave has an amplitude and frequency and you don't have to see the wave to know that.
 
Chaosblade02 said:
11/12 - I got the magnifying glass question wrong. I didn't think that question was presented very well. The confusion was between 2 and 3, and I picked 2 because that's the image that looked to me like it was magnifying.

Question #12 wasn't a science question, because Astrology isn't considered by most to be a real scientific field. Its based purely on speculation and superstition. Its about as scientific as religion is.
Click to expand...

Anyone who considers Astrology as science is stupid. It is pseudoscience. It is presented as science, with no actual science involved.
 
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