Washington Elementary
Session 2010-033

Application

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Class

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Miscellaneous

Transcript

Connected on 2010-05-02 16:00:00 from Burlingame, CA, US

• 3:07 pm
• Bugscope TeamHello out there! Setting up in a few minutes.
• Bugscope TeamWaiting for the chamber to pump down.

• Guest EntomologistNow making presets.
• 3:12 pm

• 3:19 pm

• 3:25 pm

• 3:33 pm

• 3:40 pm

• 3:46 pm

• 3:52 pm

• 3:57 pm

• 4:02 pm

• 4:13 pm

• 4:20 pm
• Bugscope TeamWelcome to Bugscope!
• Bugscope TeamPlease let us know when you have questions about anything.
• Bugscope TeamThe insects, the microscope, the controls...
• TeacherIs there an overview image of the SEM as an introduction to the instrument?
• Bugscope Teamnot unless you go back to the home page, like in another window
• Bugscope Teamfor example you could open the home page and from there you could find an image of the 'scope

• Bugscope Teamhttp://bugscope.beckman.illinois.edu/the_microscope

• Bugscope Teamso if you open another window and click on the address below you can see the microscope
• TeacherHow do I find other presets?
• Bugscope Teambe sure your page is fully open
• Bugscope TeamI think it is F10 (or F11)
• 4:25 pm
• Bugscope Teamand it may be that your screen resolution needs to be modified
• Bugscope Teamyou should have the page open enough so that you have the ability to scroll through the presets
• Bugscope Teamcan you see the other presets, or the first few at least?
• Bugscope Teamplease let us know if we can help
• TeacherHi Scott, we've lost the controls
• Bugscope Teamhere is the page from our web page with an image of the microscope on it: http://itg.beckman.illinois.edu/microscopy_suite/equipment/ESEM/
• Bugscope Teamplease refresh and see if that works
• 4:31 pm

• Teacherthank you
• Bugscope Teamokay I see that you logged in as iv, so I gave iv control

• Bugscope Teamthis is the ladybug, now the beetle, which we have not identified to species
• TeacherThere was some confusion about how to operate the browser..... thankxs.
• Bugscope Teamlooks like you are doing very well
• Bugscope Teamif you have any more trouble please let us know
• Bugscope Teamwe are just sitting here, 23 feet underground, in a dark 'scope room
• Bugscope TeamDiana is an entomology grad student from Colombia.
• 4:36 pm
• Guest EntomologistHi, If you have any questions let us know

• Bugscope Teamthis is a piece of debris on the compound eye

• Bugscope Teamyou can see the ommatidia -- the facets of the compound eye-- in the background

• Bugscope Teamactually now you can see bubbles in the doublestick carbon tape now

• Bugscope Teamand these are the mouthparts

• Bugscope Teamand the antenna

• Bugscope Teamone of the limbs

• 4:41 pm

• Bugscope Teamthe jaws of most insects open from the sides, often like a gate

• Teacherdoes the bug have teeth?
• Bugscope Teamthese are bristles on one of the arms
• Guest EntomologistThese are setae, like hairs on the legs

• Bugscope Teaminsects do not have teeth, but sometimes they have hardened tips to their jaws

• Bugscope Teamthese are likely mechanosensory setae -- the beetle can feel things that are touching the
• Bugscope Teamthem

• Bugscope Teamwe think of insects and other similar arthropods -- insects and other invertebrates -- as having a suit of armor. The cuticle, made of chitin, is like armor.
• TeacherWhat do they use their antennae for?

• Bugscope Teamthe antennae also collect information from the environment -- they pick up pheromones from the air, for example

• Bugscope Teamin some insects, the antennae seem to be more important than the eyes
• 4:46 pm

• Bugscope Teamif you rub the smell of a dead ant onto a live ant, the worker ants that throw things away will take the live ant away because their antennae tell them that it is dead.

• Bugscope Teamcan you see the other presets, below this one in the preset list?

• Bugscope Teamyou can see the tip of the beetle's antenna here
• Bugscope Teamcool!

• Bugscope Teamthe setae we see can be mechanosensory -- that is, touch sensory; chemosensory, so they sense chemical scents; and thermosensory, so that they sense heat.
• TeacherScott: where is the preset list?

• Bugscope Teamthe presets are to the right of the chat, and you should be able to scroll down through them
• Bugscope Teamdo you not see them?
• 4:51 pm
• Teachernot i don't see them.
• Bugscope Teamplease change your screen resolution to 1024 x 768
• Bugscope Teamthat will allow you to see the whole browser window
• TeacherMy Firefox window isn't wide enough. I'll try to change the resolution.
• Bugscope Teamyou should, on a PC, be able to do that by clicking on the background screen, not this one
• Bugscope Teamcool
• Bugscope Teamthen you can also maximize your resolution by hitting F10, I think it is.
• TeacherAcutally, I'm on a older MacBook. So I have to look a bit.
• Bugscope Teamum let me call Chas and ask him -- this all was written on a mac.
• 4:57 pm
• TeacherI found the display settings and we are at 1024 x 768.
• Guest Entomologistcan you see the presets?

• Bugscope Teamyou should be able to see the presets now, and select from them -- they are like thumbnails -- by clicking

• Bugscope Teamhere we see the tarsi -- the claw and the distal tarsomere
• Bugscope Teamover the abdomen of the beetle
• Bugscope Teamit is very bright, right now
• Bugscope TeamI modified it...
• Guest EntomologistVentral part of body insects is known as sternites

• Bugscope Teamif you take the mag down you can see more of where you are now
• Bugscope Teamthis is the edge of the abdomen, I believe
• 5:03 pm
• TeacherScott: We figured it out. The browser edge was too short.
• Bugscope TeamCool!
• Bugscope TeamAwesome!

• Bugscope Teamthis is a true bug

• 5:08 pm

• Bugscope Teamyou can see those little pads -- pulvillar pads -- on the tarsi

• Bugscope Teamthose pads have tenent setae on them that help them stick to vertical surfaces
• Bugscope Teamsee the claws?

• Bugscope Teamand above the claws are the pads that have sticky tenent setae on them

• Bugscope Teammost insects we see have claws similar to this
• Bugscope Teamall insects have six legs

• Bugscope Teamthis is cool!
• Bugscope Teamnow we are looking at the face of the spider
• Bugscope Teamyou can count the eyes...
• Bugscope Teammost of them we can see now

• TeacherDo spiders have eight eyes?
• Bugscope Teambelow are the chelicers, or chelicerae, and at their ends are the fangs, which we could not see earlier when we looked
• 5:14 pm
• Bugscope Teamyes most spiders have eight eyes, but many of them do not see very well

• Guest EntomologistSpiders have many eyes, their position on the head can help to taxonomist to know the identity of them

• Bugscope Teamthis is cool these are plumose setae
• Bugscope Teamthey are very sensitive to vibration
• Bugscope Teamthey're plumose -- like pine trees

• Bugscope Teamyou are doing a good job driving
• Bugscope Teamspiders have soft bodies

• Bugscope Teamif there were bacteria here we would be able to see them
• TeacherWhat are these lines that look like fingerprints?
• Bugscope Teambacilli -- like E coli or anthrax -- are usually about 2 microns -- 2 micrometers -- long.
• Bugscope Teamthese are folds in the surface of the spider's cephalothorax
• Guest EntomologistSpider body is divided in two parts: cephalothorax and abdomen. They are not insects!
• 5:19 pm

• Bugscope Teamthis is the head of one of the fruit flies

• Bugscope Teamyou can see the compound eyes, and the antennae, and the mouthparts
• Bugscope Teamnow, on the lower left, you can see one of the spiracles
• Bugscope Teaminsects breathe through the spiracles

• Bugscope Teamthis is a roly poly

• Bugscope Teamalso called a woodlouse
• Bugscope Teamand a pillbug or sowbug

• Bugscope Teamfruit flies really are flies -- Diptera. so they have two wings

• Bugscope Teamthe haltere here is hard to see == we see only the base of it, to the right of where we are now
• Bugscope Teamthis is the edge of the wing

• Bugscope Teamthis is the edge of the wing
• 5:25 pm
• Bugscope Teamand above that we see part of the abdomen

• Bugscope Teamoops shrunken

• Bugscope Teamsee how the ommatidia -- the facets of the compound eye -- have little setae sticking out between them?

• Bugscope Teamthose setae help the fruit fly gauge wind speed and direction

• Bugscope Teamso pretty

• Bugscope Teamthere it was so dark

• Bugscope Teamthis is the head of a small grasshopper
• TeacherWe like the beetle

• 5:30 pm
• Bugscope Teamcool
• Teacherladybug?

• Bugscope Teamthe ladybug is preset no 24

• Bugscope Teamyou could go to that preset and then take the mag down

• Bugscope Teamactually it is to the east of this beetle

• Bugscope Teamthis is a very small beetle, and we weren't sure what kind it is

• Bugscope Teamthe edge of the world

• Bugscope Teamyou can see a Torx screw there.

• Bugscope Teamgood job!

• Bugscope Teamthat was the ladybug

• Bugscope Teamto the east there were you were
• TeacherThank you. That's great.
• Bugscope Teamdo you have more students coming?
• Bugscope Teamor are you done?
• 5:36 pm
• TeacherScott: We have one more session. Underway.
• Bugscope Teamalright!

• Bugscope Teamgood deal we are here

• Bugscope Teamlooks like he has a rock caught on his eye

• Bugscope Teameach of these ommatidia is an individual lens

• Bugscope Teamif you had compound eyes you would have better peripheral vision -- you would be able to see more without moving your head around

• Bugscope Teamand also, if you had compound eyes you would have a better ability to see motion

• Bugscope Teamthings moving toward or away from you would be more apparent -- that is why it is hard to swat a fly
• 5:41 pm

• Bugscope Teamsee the ball and socket joint of this leg?

• Bugscope Teamsometimes antennae are like that as well

• Bugscope Teamnow you can see the mouth of the beetle
• Bugscope Teamthose little leg-like things are palps
• TeacherWhy does the bug have hair on it's leg?

• Bugscope Teamthe hair, which we often call 'setae,' are mechanosensory, and they help the bug sense things that are touching it

• Bugscope Teambecause insects have an exoskeleton -- a shell -- they cannot easily feel things that are touching them without using sensory hairs

• Bugscope Teamthe spider!

• Bugscope Teamthe cephalothorax is more like an insect's exoskeleton than the abdomen, which is soft and shrivels up when the spiders dies and it dries up

• Bugscope Teamlarge domelike eye

• 5:46 pm
• Bugscope Teamnow we see more of those beautiful plumose setae

• Bugscope Teamgood job driving!

• Bugscope Teamthey help the spider sense vibration

• Bugscope Teamawesome

• Bugscope Teamsome spiders, like tarantulas, have tiny hairs called urticating hairs that they let loose when they are bothered

• Bugscope Teamthe urticating hairs are annoying -- they get in your eyes, for example, and they make you itch

• Bugscope Teamand they keep you from bothering the tarantula

• Bugscope Teamthis is great control of the microscope

• TeacherWhat do you think is this plate-like thing in the center?

• Bugscope Teamit is some dried and flakey fluid, we think
• 5:52 pm

• Bugscope Teamspiders feed by biting their prey and injecting venom that dissolves the inner organs of their victim. then they suck all of the liquid contents up like a milkshake.

• Bugscope Teamsome true bugs do the same thing -- like ambush and assassin bugs

• Bugscope Teamhttp://bugscope.beckman.illinois.edu/members/2010-033/
• TeacherDoes the grasshopper have a compound eye?
  Bugscope Teamyes it does!
• Bugscope Teamwhen we are done, all of the images and text from this session will be available to you at the link below
• Bugscope Teamif you go to preset 1 you can see it

• Bugscope Teamit is so smooth it is difficult to see that it has ommatidia
• Bugscope Teammuch like a praying mantis or a cricket

• Bugscope Teamsee how smooth the little hexagonal ommatidia are?

• Bugscope Teamand very even

• 5:57 pm
• Bugscope Teamsuch a lovely profile

• Bugscope Teamimagine if you ate grass how quickly your teeth would wear dow n

• Bugscope Teamit has hairy legs

• Bugscope Teamthose little spines let it feel what it touching it
• Bugscope Teamwow

• Bugscope Teamtouching it...
• Bugscope Teamnice
• TeacherSkin has shingles?

• Bugscope Teamyes but it is the surface of the shell -- the cuticle or chitin -- it doesn't really have skin. it is more like the shell of a shrimp, or like what your fingernails are made of.

• Bugscope Teamthe beetle!
• TeacherScott: We're done. Thank you very much for all your help. This worked out very well.
• Bugscope Teamthese are all invertebrates, meaning that they don't have backbones. But they don't have bones at all!
• Bugscope Teamhttp://bugscope.beckman.illinois.edu/members/2010-033/
• Bugscope TeamThank you!
• Bugscope TeamSee you next year!
• 6:02 pm
• TeacherOr sooner!
• Bugscope Teamcool!
• Bugscope Teamover and out!
• Bugscope TeamBye!