Comments for Science Cafe http://sciencecafe.org/content Fun science for everyone Mon, 21 Nov 2011 06:39:06 +0000 hourly 1 http://wordpress.org/?v=3.2.1 Comment on How to make Oobleck by Oobleck! « Ms Collins Loves Books http://sciencecafe.org/content/2008/12/22/how-to-make-oobleck/comment-page-1/#comment-43726 Oobleck! « Ms Collins Loves Books Mon, 21 Nov 2011 06:39:06 +0000 http://sciencecafe.org/blog/?p=186#comment-43726 [...] here to find out more about Oobleck and non-Newtonian [...] [...] here to find out more about Oobleck and non-Newtonian [...]

]]> Comment on How to make Oobleck by Oobleck! | Ms. Collins Loves Books http://sciencecafe.org/content/2008/12/22/how-to-make-oobleck/comment-page-1/#comment-43426 Oobleck! | Ms. Collins Loves Books Fri, 18 Nov 2011 05:52:31 +0000 http://sciencecafe.org/blog/?p=186#comment-43426 [...] here to find out more about Oobleck and non-Newtonian fluids Share this:TwitterFacebookLike this:LikeBe [...] [...] here to find out more about Oobleck and non-Newtonian fluids Share this:TwitterFacebookLike this:LikeBe [...]

]]> Comment on How to make Oobleck by Oobleck « A Just Recompense http://sciencecafe.org/content/2008/12/22/how-to-make-oobleck/comment-page-1/#comment-42929 Oobleck « A Just Recompense Sun, 13 Nov 2011 23:35:37 +0000 http://sciencecafe.org/blog/?p=186#comment-42929 [...] cool is this? Check out more at the Science Café, where they explain it a lot better than I do. And they include video of the whole walking on water [...] [...] cool is this? Check out more at the Science Café, where they explain it a lot better than I do. And they include video of the whole walking on water [...]

]]> Comment on How to make Oobleck by Preschool Color-Mixing Activity | kids in the studio http://sciencecafe.org/content/2008/12/22/how-to-make-oobleck/comment-page-1/#comment-41675 Preschool Color-Mixing Activity | kids in the studio Fri, 28 Oct 2011 11:11:48 +0000 http://sciencecafe.org/blog/?p=186#comment-41675 [...] her concoction-making, watching the colors mix and periodically dipping a hand into the very watery ooblek she’d created. When she was done (when the foil container was full), she used the remaining [...] [...] her concoction-making, watching the colors mix and periodically dipping a hand into the very watery ooblek she’d created. When she was done (when the foil container was full), she used the remaining [...]

]]> Comment on How to make Oobleck by Taste of Camp Quest NorthWest | Camp Quest NorthWest http://sciencecafe.org/content/2008/12/22/how-to-make-oobleck/comment-page-1/#comment-36350 Taste of Camp Quest NorthWest | Camp Quest NorthWest Tue, 30 Aug 2011 04:52:59 +0000 http://sciencecafe.org/blog/?p=186#comment-36350 [...] that was the main event: 10 gallons of oobleck! Oobleck is a non-newtonian fluid that looks and runs like water, until you apply pressure, at [...] [...] that was the main event: 10 gallons of oobleck! Oobleck is a non-newtonian fluid that looks and runs like water, until you apply pressure, at [...]

]]> Comment on FAQ about Hermit Crabs by Carl http://sciencecafe.org/content/2008/12/28/faq-about-hermit-crabs/comment-page-1/#comment-35969 Carl Wed, 24 Aug 2011 22:42:36 +0000 http://carldnelson.com/sciencecafe.org/content/?p=233#comment-35969 Hi Brittany, You can try the following steps to see if they help, It seems streaking is caused by dehydration, a salt imbalance, and/or sickness. Hermit crabs will naturally hang out of their shell to dry off some of their shell water to make it more concentrated (saltier). Maybe streaking is an extreme form of this behavior that happens when the hermit crab has lost too much body salt and is unable to keep its shell water salty. (This could be caused by too many fresh water baths, or not enough access to a salt source.) Hermit crabs are not that well adapted for life on land so use their shell water to help regulate their bodies chemistry. The idea of this treatment is to recreate the shell water and re-hydrate the crab at the same time, hopefully allowing the crab to bring it's chemistry back to normal levels. Initially, water gain is the priority. A crab without a shell will dry out very quickly, and has probably lost a lot of water already before you discovered it. <strong>Step 1 </strong> Rinse a cup several times to get off any residual dish washing detergent. Place the naked crab in the cup with a little fresh water treated with dechlorinator at 75-80 degrees. Not enough water to cover the crab, but enough that it submerges most of the length of its legs, but not the thorax. Offer a shell that is the right size to slightly smaller than usual. Cover the cup with plastic wrap and poke only a few holes for air flow. This will increase the humidity and make it easier for the crab to breath and become re-hydrated. Then place a hand towel over the cup to create a dark environment that will decrease the stress on the crab. Allow the crab to find the shell, or place the crab's tail in the shell to encourage its reentry (if the crab does not do it on its own). The crab may take from 30 minutes to an hour to get back in a shell. Let the crab rest in the shell for 30 minutes to an hour before filling the shell with sea salt water. If the crab has still resisted the shell after 2 hours, then replace the fresh water with sea salt water in the cup. <strong>Step 2 </strong> Sea salt water can be made from 1tsp-1/2 tbs sea salt per cup water. Mix it well and make sure it is about the same temperature as the crab (75-80). Either dunk the crab w/shell into the sea salt water or pour the water into the shell. Do not let this step last too long as it is important to limit handling, which stresses the crab.However, if the crab is not yet in a shell, please replace the fresh water in the cup with sea salt water. Cover the cup with the plastic wrap and towel. Check it periodically to see if the crab has entered a shell, or if it will go in one with your help. Once it's in a shell, start at the top of step 2. If the crab has not moved into a shell, it is up to you if you would like to do. You can modify step 3 if you like, or try something different. <strong>Step 3 </strong> Empty out the cup but for the smallest amount of fresh water it takes to cover the bottom. Replace the salted crab into the cup without spilling too much shell water. Replace plastic wrap and hand towel. Leave the crab undisturbed for 12 hrs (or overnight). If the crab is active (or at least responsive to movements), its chances of survival are good. If it is hardly moving at all, you can continue to let it sit in the cup or try something else you can think of. Either way, it is good to keep the crab in the cup for another half day to let it rest. It has been shown that crabs take longer than 24 hours to fully recover from dehydration. (Don't worry about feeding the crab) <strong>Step 4 </strong> Depending on which environment is better, place the crab back in the main tank or in an isolation tank. Continue to monitor the crabs progress and be sure to put the crab in the fresh water and salt water dishes daily. After about 1 week, or after the crab has regained its full activity level, you may return to your normal general care routine. Hi Brittany,

You can try the following steps to see if they help, It seems streaking is caused by dehydration, a salt imbalance, and/or sickness.

Hermit crabs will naturally hang out of their shell to dry off some of their shell water to make it more concentrated (saltier). Maybe streaking is an extreme form of this behavior that happens when the hermit crab has lost too much body salt and is unable to keep its shell water salty. (This could be caused by too many fresh water baths, or not enough access to a salt source.) Hermit crabs are not that well adapted for life on land so use their shell water to help regulate their bodies chemistry.
The idea of this treatment is to recreate the shell water and re-hydrate the crab at the same time, hopefully allowing the crab to bring it’s chemistry back to normal levels.

Initially, water gain is the priority. A crab without a shell will dry out very quickly, and has probably lost a lot of water already before you discovered it.

Step 1

Rinse a cup several times to get off any residual dish washing detergent. Place the naked crab in the cup with a little fresh water treated with dechlorinator at 75-80 degrees. Not enough water to cover the crab, but enough that it submerges most of the length of its legs, but not the thorax. Offer a shell that is the right size to slightly smaller than usual. Cover the cup with plastic wrap and poke only a few holes for air flow. This will increase the humidity and make it easier for the crab to breath and become re-hydrated. Then place a hand towel over the cup to create a dark environment that will decrease the stress on the crab. Allow the crab to find the shell, or place the crab’s tail in the shell to encourage its reentry (if the crab does not do it on its own). The crab may take from 30 minutes to an hour to get back in a shell. Let the crab rest in the shell for 30 minutes to an hour before filling the shell with sea salt water. If the crab has still resisted the shell after 2 hours, then replace the fresh water with sea salt water in the cup.

Step 2

Sea salt water can be made from 1tsp-1/2 tbs sea salt per cup water. Mix it well and make sure it is about the same temperature as the crab (75-80). Either dunk the crab w/shell into the sea salt water or pour the water into the shell. Do not let this step last too long as it is important to limit handling, which stresses the crab.However, if the crab is not yet in a shell, please replace the fresh water in the cup with sea salt water. Cover the cup with the plastic wrap and towel. Check it periodically to see if the crab has entered a shell, or if it will go in one with your help. Once it’s in a shell, start at the top of step 2. If the crab has not moved into a shell, it is up to you if you would like to do. You can modify step 3 if you like, or try something different.

Step 3

Empty out the cup but for the smallest amount of fresh water it takes to cover the bottom. Replace the salted crab into the cup without spilling too much shell water. Replace plastic wrap and hand towel. Leave the crab undisturbed for 12 hrs (or overnight). If the crab is active (or at least responsive to movements), its chances of survival are good. If it is hardly moving at all, you can continue to let it sit in the cup or try something else you can think of. Either way, it is good to keep the crab in the cup for another half day to let it rest. It has been shown that crabs take longer than 24 hours to fully recover from dehydration. (Don’t worry about feeding the crab)

Step 4

Depending on which environment is better, place the crab back in the main tank or in an isolation tank. Continue to monitor the crabs progress and be sure to put the crab in the fresh water and salt water dishes daily. After about 1 week, or after the crab has regained its full activity level, you may return to your normal general care routine.

]]> Comment on FAQ about Hermit Crabs by Brittany http://sciencecafe.org/content/2008/12/28/faq-about-hermit-crabs/comment-page-1/#comment-35959 Brittany Wed, 24 Aug 2011 21:13:03 +0000 http://carldnelson.com/sciencecafe.org/content/?p=233#comment-35959 My hermit crab has been out of his shell for over 30 minutes what should I do My hermit crab has been out of his shell for over 30 minutes what should I do

]]> Comment on FAQ about Hermit Crabs by Carl http://sciencecafe.org/content/2008/12/28/faq-about-hermit-crabs/comment-page-1/#comment-34315 Carl Mon, 08 Aug 2011 00:29:59 +0000 http://carldnelson.com/sciencecafe.org/content/?p=233#comment-34315 Hey, somehow I missed this comment for quite sometime. Sorry about that! Well, Hermit Crabs are scavengers and will most likely eat the dead crab long before anything harmful happens to the dead crab. Carl Hey, somehow I missed this comment for quite sometime. Sorry about that!
Well, Hermit Crabs are scavengers and will most likely eat the dead crab long before anything harmful happens to the dead crab.

Carl

]]> Comment on FAQ about Hermit Crabs by Carl http://sciencecafe.org/content/2008/12/28/faq-about-hermit-crabs/comment-page-1/#comment-34314 Carl Mon, 08 Aug 2011 00:28:06 +0000 http://carldnelson.com/sciencecafe.org/content/?p=233#comment-34314 Hi Jeri, Don't worry about the sand, the crabs will find the food. Remember, they are natural scavengers so are accustomed to finding scraps of food in all sorts of messy spots. Of course I'm assuming that the food is not completely buried under the sand! :) Enjoy watching your crabs! Carl Hi Jeri,

Don’t worry about the sand, the crabs will find the food. Remember, they are natural scavengers so are accustomed to finding scraps of food in all sorts of messy spots.
Of course I’m assuming that the food is not completely buried under the sand! :)
Enjoy watching your crabs!

Carl

]]> Comment on FAQ about Hermit Crabs by Jeri http://sciencecafe.org/content/2008/12/28/faq-about-hermit-crabs/comment-page-1/#comment-34311 Jeri Sun, 07 Aug 2011 23:36:02 +0000 http://carldnelson.com/sciencecafe.org/content/?p=233#comment-34311 QUESTION...this might be obvious but I just got home with my hermit crabs and my son let a bunch of sand get in their food. Is that ok? QUESTION…this might be obvious but I just got home with my hermit crabs and my son let a bunch of sand get in their food. Is that ok?

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