9th Grade Biology - Free Educational videos for Students in K-12

9th Grade Biology - By

Transcript


00:06	All right . Remember we talked about sponges ? Who
00:09	remembers what we said about the way sponges eat ?
00:12	I'm gonna get you guys do it as a class
00:14	. We know that they the water goes . I
00:17	go I go I only see half of your doing
00:22	it . Let's do that . The water goes good
00:27	job for you . Okay ? We also talked about
00:30	Madere Ian's . Okay . Remember Nigerians ? What did
00:35	I teach you to remember ? The darien ? How
00:37	did they act ? How do polyps act ? Go
00:40	ahead and do it ? I know you remember ,
00:43	tell us , oh your tentacles are at the top
00:47	. That's and what else is in the middle of
00:48	tentacles ? Let me see those polyps , do I
00:52	have to say raise your hands , raise your tentacles
00:56	in the here and waving like you just don't care
01:00	. And all the polyps in the room say oh
01:03	yeah . All right . You know ? Okay ,
01:07	today we're gonna talk about what what's the next file
01:10	when we're gonna talk about ? Who remembers ? No
01:16	, not mollusks . I heard someone say it .
01:19	Uh not the darien . We talked about those already
01:24	. Uh , now you're just grasping at straws .
01:28	Uh , we can talk about worms today . We're
01:34	gonna talk about worms . They say it nice and
01:36	loud . Okay , raise your hand if you've ever
01:42	held a worm in your hand . Okay , raise
01:46	your hand if you've ever seen worms after the rain
01:51	. Oh , you guys know about worms ? Raise
01:54	your hand . If you ever eaten worms , you
01:57	had worms ? What kind ? No ? Okay ,
02:02	no gummy berms don't count . All right . We're
02:05	gonna remember when we did our group work and we
02:09	did our little posters . Who's turning to produce today
02:12	? Who did flatworms ? I think it was count
02:14	. Yes . Would you guys go to your poster
02:16	, please and tell us a little bit about worms
02:18	. All right , tell us about your flatworms .
02:22	What's an example of a flatworm ? That is correct
02:30	. Nice in the plenary in and give me some
02:32	facts about plenary ins and other flatworms please . Uh
02:37	What platforms are ? Classic worms are classified in many
02:41	different problems , worms have more accomplished structures than sponges
02:46	. The more well known members of the file .
02:48	Um are the parasite , tapeworms and parasitic tapeworms and
02:56	Lucas . Which which cause disease in humans , flukes
03:01	which cause disease . Okay , flatworms range in in
03:05	size from one millimeter to several meters . How big
03:09	? How big is one millimeter . Right ? It's
03:12	real small . How big is the meter anybody remember
03:16	? This is one m and they can do several
03:21	meters long . So what I want to do at
03:24	your desk do this and join hands with the next
03:27	person . Let's see how long we can make our
03:28	worms . Okay , let's see how long your worm
03:32	is , About 2.5 m . Guess what they get
03:36	longer than that keep going . Let's see how long
03:38	some worms get . Let's see how many were .
03:41	123 four five m . Guess what some worms get
03:48	even longer than this . Okay , but we're gonna
03:50	talk about those in a minute . Go on .
03:52	Flatworms are act low . Meet a classmates . A
03:57	ceiling mates . Sorry , go ahead , say estimates
04:00	. Let's hear the class say that a seal inmates
04:02	. Good job , give them . What should we
04:06	give him a round of applause . Was that boring
04:07	? Okay , give him a round of applause .
04:09	Thank you very much . So let's talk about our
04:13	flatworms . Remember our chart that we started making describing
04:17	are different animals . So here we are on our
04:20	flatworms . Okay . And do you remember how to
04:23	spell plati helm in these ? How do you spell
04:25	platinum in these ? Which is the name of the
04:27	phylum Platje , H E O am I am I
04:37	N T H E S Plati helm in these .
04:42	And we know that Plati helm in these are what
04:45	kind of worms ? Flatworms . Okay . Oh ,
04:50	I showed you everything now . Our first group that
04:54	presented told us that we had three cell layers .
04:58	So these are trip low plastic . Everybody say trip
05:01	low plastic . Trip low plastic . I'm gonna try
05:07	one more time . You're ready ? Triple O plastic
05:12	. You're not doing it , Do it and say
05:14	it , get to do it and say it ,
05:17	my man . There you go . Okay , three
05:19	cell layers . And we said the inside seller was
05:23	called what ? The end odor Because endo means what
05:29	? Inside . Okay , I'm going to give you
05:33	some endo term . Each table gets some endo Derm
05:36	here passed around , make sure each table gets some
05:39	red Endo Derm . Okay , here's some more .
05:44	What did we say was the middle layer ? Thank
05:49	you . The middle layer . How about Nadia ?
05:56	What's the middle layer ? The triple means the three
06:01	layers . What's the middle ? Ask Samantha for some
06:04	help . I think they might know . Mezza ,
06:07	Mezza . Very good . Nadia the meso Durham .
06:11	Which is middle . Guess what ? I'm gonna give
06:13	you I'm gonna give you some meso terms . So
06:16	everybody makes sure that each table gets a measured .
06:19	ERM . Now not everybody in the table needs the
06:22	same kind . Just make sure one person has a
06:25	piece of clay . Now , what was the name
06:28	of the layer inside the endo ? And the middle
06:32	was meso . What do we call the outside layer
06:36	? The ecto Derm . Would you help me with
06:39	this please ? So , we're gonna make the ectodermal
06:42	yellow and here's some more measured . Um If you
06:44	guys need some more measured ERM and make sure each
06:47	table has some ectodermal . Everybody has some ectodermal .
06:52	Okay , it's coming back . This is what I
06:55	want you to do . Okay , since we're making
06:59	worms , what shape are worms usually in ? Well
07:04	, what kind of worms are we talking about today
07:06	? Flatworms . But we're gonna make worms , we
07:09	know they're long and cylindrical . So take your um
07:12	take your clay and roll it until you make a
07:15	worm . Remember when you made a little plato worm
07:18	? Make them long and skinny . Roll it till
07:20	you make a worm . Now , what's the inside
07:23	layer called the endo ? During what color was that
07:27	? That was red . That's going to be in
07:29	the middle . Okay , Now , what was the
07:33	middle layer called ? The metal Durham ? Now listen
07:37	, who has the message ? Um raise your ,
07:39	hold up your mess , Alderman . What car was
07:42	the method ? Um , It was blue , I
07:43	believe . Hold up the message . Um if you
07:45	have measured ERM okay , the metal derm is going
07:49	to be around the end of the term . So
07:51	once you guys roll it , you're gonna have to
07:53	flatten it on the table . Oh okay . So
07:57	get it nice and flat . Say it might work
08:02	better matt , Hold up your worm . You might
08:05	want to start with little worms so that everybody can
08:07	make some worms . Okay , this is a good
08:11	job . Get a little bit flatter than this .
08:15	You want to flatten out your measured . Um So
08:17	see if you can get it as wide as possible
08:21	without breaking anything . Okay , Which one is your
08:25	ectodermal ? Yo you're gonna do the same thing with
08:30	the ecto derm ? Okay , you're gonna fly in
08:33	the ectodermal . Because what you're gonna do is remember
08:37	you're gonna roll up your layers . We're gonna make
08:40	a worm burrito . We're gonna roll it up .
08:45	Mhm . You see how we have three layers ?
08:48	What's on the outside ectodermal ? But yours isn't blue
08:52	, yours is yellow . And what's in the middle
08:56	medal german your measurements what color blue and what's on
09:01	the inside the endo derm . Okay so let me
09:08	see somebody's endo Derm that's not endowed . ERM hold
09:14	up your end of term if you don't have one
09:18	of your partner has one that's okay . Just one
09:20	of you hold up the and older um now this
09:22	is gonna go in the middle , how do you
09:24	think we're gonna get the medal derm to fit with
09:27	the endo Derm ? We're gonna say it again ,
09:33	Terrell . Very good . You're gonna wrap it around
09:37	. So now that's why I told you make it
09:38	nice and flat and I told you to make it
09:40	worms nice and small . So go ahead take your
09:43	missile Derm . Right and wrap it around the end
09:49	Alderman . I'll let you do that . Okay ,
09:52	wrap your and your message um around the end of
09:54	their so it's completely covering . Yeah . Now if
09:59	you've got some leftover , what can you do ?
10:01	You can just take this off and put it .
10:04	No , we're not eating our worm burritos today .
10:07	I'll bring some worms . You can eat later .
10:09	Okay , we'll fold it over . Got that .
10:13	Let me see . This is what it should look
10:16	like . Very nice . Warm Samantha . So on
10:18	the outside , all you should see is what what's
10:22	it called ? Metzelder ? But on the inside where
10:26	you're gonna see Endo Durham , what else are we
10:29	gonna do after this ? We're gonna make ectodermal .
10:33	So flatten out your ectodermal and wrap your environmental determine
10:37	your ectodermal . Now , I'm gonna need one more
10:40	thing . What are we missing up there ? We
10:46	need a digestive track . How do you think we're
10:49	going to make a digestive track ? I'm gonna give
10:52	you a paper clip . Make straighten it out .
10:57	Yeah . Okay because your digestive tract is just a
11:01	whole . So take your paper clip straighten it out
11:05	like this . And then what can you do with
11:08	it ? Stick it through the middle so that you
11:13	get that hole through your work when you look through
11:17	this , what do you see ? You see all
11:20	three layers ? And we know that organisms with three
11:23	cell layers are called triple A . Plastic . Say
11:29	it with me . Say it with me again and
11:32	do the motion . Very good . Triple plastic .
11:37	We said that this these worms are in what file
11:39	them ? No it's on the board , it's not
11:45	on the board anymore . Plati hell meant these flatworms
11:49	. Right ? So now that you have your work
11:51	? Oh I'm sorry . Did you give it a
11:53	did you give it a digestive system ? You got
11:55	to give it a digestive system ? Hold your arms
11:58	above your head when you're ready with them . Hold
12:02	your arms above the head . Now , it's the
12:05	only thing our worm is missing . Since this is
12:07	supposed to be a flatworm , it has to be
12:11	flat . I know you'll enjoy this , so on
12:14	the count of three we will flatten our worms .
12:20	Okay ? Don't stomp them . Don't permanently fly them
12:23	. Just take them and squish it between your hands
12:25	. Are you ready ? One two . 01 more
12:30	thing when we flat in our worms we're going to
12:33	call out pretty um in these . You ready ?
12:36	Because that's what we're making . Are you ready everybody
12:41	ready ? 123 . Very good . Show me your
12:48	flatworms . Show me your flatworms . Very good ,
12:54	very good .

Summarizer

DESCRIPTION:

9th grade biology lesson on taxonomy. Teacher leads the students through flatworm anatomy by having them create worms out of clay to strengthen their understanding.

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