Questions in the Science & Nature category.
Displaying 1 through 20 of 4997 (random). Subscribe:

February 25

Ideas for Elementary Science Stations

I'm trying to set up a number of "stations" at home for long-term observation and record keeping. The observers are ages 3-7, but I'm not looking for crafty or disposable, cheap science projects or stations like they sell at hobby stores. These stations can be built all at once, or assembled over time (as the kids get older). [more inside]
posted by katyh at 2:59 PM - 15 answers

February 24

How many Americans are getting sick from using public touch screens?

This question came to me as a result of seeing staplers with antibacterial tops at an office retailer. What's next - anti microbial doorknobs? As I thought about the number of touch screens I use during the day - ATMs, debit card machines, etc, - and the fact I've never seen anyone cleaning them, it occurred to me they are probably far germier than office equipment. [more inside]
posted by ADave at 10:28 PM - 12 answers

Extremely basic statistical question

My state has 709 zip codes. I want to draw reasonably well-grounded conclusions about the entire population of my state (having to do with insurance coverage and ACA subsidies, if you're interested). How many zip codes should I sample? [more inside]
posted by Mr. Justice at 11:03 AM - 18 answers

February 23

What kind of feather is this?

I need to get more of this type of feather, but I don't remember which bird it came from. I know it's been dyed. Thanks for your help!
posted by elle.jeezy at 2:52 PM - 2 answers

February 21

Ways to explain/illustrate the space-time continuum?

What are some good resources for helping to imagine/understand Einstein's concept of space and time as interdependent/related? I liked a lot of Brian Greene's visualization, though some of the shifting now-slice metaphor remained a bit opaque. Mention of experimental evidence would also be appreciated. [more inside]
posted by progosk at 3:15 PM - 7 answers

February 20

How do I find this? Fish and habitat at a certain depth?

I'm trying to find out example of adaptations of marine fish that live at a certain depth and what that habitat looks like. But I'm not sure how to go about finding this information. I'm running into information overload where I don't know how to narrow this down. [more inside]
posted by [insert clever name here] at 1:31 PM - 7 answers

How to adjust my weather station?

I need a help adjusting an analog weather station. [more inside]
posted by Thorzdad at 8:49 AM - 4 answers

February 19

can berries give your baby hepatitis A?

i have a question regarding imported food product into australia. it is not to be critical of any process or culture, i just want some factual answers. the stuff i think i know: is it possible that a person (although immunized against hep A) could handle or eat food product that is contaminated with the virus, and in the interim get pregnant, and cause some harm to the baby? to put it another way, would the baby be immunized because the mother is immunized? [more inside]
posted by edtut at 4:02 PM - 9 answers

The amount of autistic people in the United States

If autism is diagnosed in 1 of 68 children, and there are 381 million people in the country, can I use these two facts to find out how many people in the US are autistic?
posted by motioncityshakespeare at 8:45 AM - 10 answers

February 16

Cambridge Brain Sciences percentile?

How does CBS calculate percentiles? i.e. Looking at the distribution for the Odd One Out test, my top score seems to lie very comfortably in the top 5% or so range(it's not even close to the mean value of the (almost) normal distribution, while being very close to the right tail of the distribution); yet the percentile score is merely top 60%. What does this imply? Are the percentile scores representative of a smaller sample of better performers?
posted by red_alert_3 at 10:07 PM - 3 answers

Tar Sands relative impact

Recent EPA letter estimates annual emissions from development & use of Tar Sands crude at between 1.3 & 27.4 metric tons. Anybody know the annual world total? MMTC02e is precise unit shown in link.
posted by LonnieK at 8:54 AM - 5 answers

February 14

Water park physics

What happens if your group exceeds the weight limit on a slide at the water park? [more inside]
posted by dontjumplarry at 12:44 PM - 11 answers

February 13

Mathematically challenged, not an Excel guru, need help

I am trying to figure out a way to use Excel to take an initial lat/long coordinate and then add a pre-determined figure to create offset coordinate points. [more inside]
posted by a3matrix at 8:47 AM - 4 answers

February 12

do Norwex cloths really safely clean with just water?

It is safe to take my baby to a playspace that is using just Norwex cloths and water to clean? [more inside]
posted by octarine at 6:43 AM - 26 answers

February 10

What is this?

It's a bug, in my place, in February. Beyond that, I don't know. [more inside]
posted by cotton dress sock at 11:48 PM - 13 answers

Help me ID ragweed in the field, from a distance

I am allergic to ragweed. I have no clue what it looks like. Give me your best pics, tips, and secrets, oh people of metafilter with Plant Foo. [more inside]
posted by Michele in California at 10:56 AM - 9 answers

February 9

Ice on puddles when low temperate is above zero?

I've been seeing ice on the tops of puddles when the low temperature for the day is forecast to be low (2 or 3 degrees) but not freezing. Why is that? [more inside]
posted by Bugbread at 4:09 PM - 7 answers

How to calculate maximum weight before a length of box section bends

I have a length of steel box section, 80mm x 80mm, 3.6mm thick which is 4m in length. I want to put something onto it, in the centre that weighs 900kg. I want to know how to calculate whether this is possible but am unsure how to do it. I really want to know the maximum amount of weight I can put on before it breaks.
posted by aqueousdan at 2:25 PM - 26 answers

Wedding readings for a scientist?

I'm a physicist, and I'm marrying a biologist. Can Mefi suggest any wedding readings suitable for us? We're looking for something along a sciency theme.
posted by alby at 10:59 AM - 21 answers

Keeping on top of the snowstorm -- does it really matter?

I am in the snowy state of Massachusetts and avoiding my next foray out to shovel. Plus, spouse and I slightly disagree on how often we really need to go out and shovel. Does it really save time to shovel every few hours throughout the storm? I have a suspicion that it doesn't really save time, and that we be just as fine waiting until the end of the snowstorm -- is there a way to think this through mathematically to find a good answer?
posted by lillygog at 9:40 AM - 34 answers

« Older questions