Sprocket

We just learned about the Gear.

Another piece of a machine is a Sprocket.

This is a wheel with teeth that looks a lot like a gear, but it is made to hook into a chain or a track.
If you look on a bicycle you will see a chain hooked to a wheel with teeth.
When you move the pedals it turns the wheel, which moves the chain, which turns the bike wheels and makes it go.
The wheel with teeth hooked to your pedals is a sprocket.

Sprockets are also used in things like tanks, or in other big machines.



(from: wikipedia - sprocket)


Kid Facts - Blast from the past: Gyroscope

Velella

We just learned about the Portuguese Man o' War that looks like a jellyfish but is a hydrozoan.

Another type of hydrozoan is the Velella, also called the sea raft, by-the-wind sailor, purple sail or little sail.

These are small blue animals that float along the top of the water, and have what looks like a little sail on top of their body.

The sail catches the wind and helps these animals move along the water.

They are very small, only about two and a half inches.
Just like other hydrozoans, they are actually a bunch of small animals all stuck together.
They use small tentacles to catch things like plankton with stingers and then eat them up.

The stingers don't hurt humans, but might make their skin itch a little.


(from: wikipedia - velella)


Mass stranding Velella velella on Menorca May 2013 - JNJPO

Kid Facts - Blast from the past: Ammonoidea

Tonsils

We just learned about the Parotid Gland.

Another part of the mouth is the Tonsils.

Usually when people talk about tonsils they mean the two lumps at the back of the throat.
There is one on the left and one on the right.

The big long name for these is the palatine tonsils or faucial tonsils.

There are actually three types of tonsils:
- Palatine tonsils - At the back of the throat
- Tubal tonsils - Behind the throat and almost back by the ear
- Adenoids, also called the pharyngeal tonsil or nasopharyngeal tonsil - Up the back of the throat and behind the nose

These tonsils have special tissues in them that help fight against sickness and germs.


(from: wikipedia - palatine tonsil)



(from: wikipedia - tobal tonsil)



(from: wikipedia - adenoid)


Kid Facts - Blast from the past: Supernumary Teeth

Butter Churn Tower

We just learned about the Outworks.

Another type of a castle part is the Butter Churn Tower.

This is a tower that has an upper and lower defensive wall.

It gets its name because it looks kind of like a butter churn.


(from: wikipedia - butter-churn tower)


Kid Facts - Blast from the past: Mehrangarh

Christianity in Armenia

We just learned about the First Council of Nicea where people met to talk about what the truth was about Jesus.

Another part of early Christianity was Christianity in Armenia.

In the year 301 there was a religious person named Gregory the Illuminator who grew up learning about Christianity.
When he was older he talked to the King of Armenia named Tiridates III about Christianity, and the King decided to become Christian too.

Gregory baptised Tiridates III, and then the King decided to make Christianity the official religion in the country of Armenia.



(from: wikipedia - gregory the illuminator)



(from: wikipedia - tiridates iii of armenia)



(from: wikipedia - tiridates iii of armenia)


Kid Facts - Blast from the past: Stachys - Bishop of Byzantium

Obelisk of Axum

We just learned about the Akan Goldweights used as measurements for gold, and to tell stories.

Another ancient African sculpture is the Obelisk of Axum, made some time around 300 AD in Ethiopia.

A very long time ago in Ethiopia when important people died, they would build towers above where they were buried.
The town of Axum where this tower was built has earthquakes sometimes, so most of the towers like this fell down and broke.

During a war, people from another country took this giant obelisk as a war trophy, and then about 50 years later it was finally brought back to Ethiopia and put back together.

The obelisk has carvings of doors and windows on it, and it is also sometimes called a stele or hawelt/hawelti.


(from: wikipedia - obelisk of axum)


Kid Facts - Blast from the past: Li Gui

Norwegian - Counting to Twenty Nine

We counted to 20 in Norwegian, let's keep going!

21 tjueen - sounds like choo-eh eh-ah-n
22 tjueto - sounds likechoo-eh toh
23 tjue-tre - sounds like choo-eh t-deh
24 tjuefire - sounds like choo-eh fee-dah
25 tjuefem - sounds like choo-eh fem
26 tjueseks - sounds like choo-eh seh-ks
27 tjuesju - sounds like choo-eh shoo
28 tjue åtte - sounds like choo-eh aw-teh
29 tjue ni - sounds like ni choo-eh nee


(from: wikipedia - norwegian language)

Greek: είκοσι ένα (eíkosi éna), είκοσι δύο (eíkosi dýo), είκοσι τρεις (eíkosi treis), είκοσι τέσσερις (eíkosi tésseris), είκοσι πέντε (eíkosi pénte), είκοσι έξι (eíkosi éxi), είκοσι επτά (eíkosi eptá), είκοσι οκτώ (eíkosi októ), είκοσι εννέα (eíkosi ennéa)

ASL: twenty-one, twenty-two, twenty-three, twenty-four, twenty-five, twenty-six, twenty-seven, twenty-eight, twenty-nine

Italian: ventuno, ventidue, ventitré, ventiquattro, venticinque, ventisei, ventisette, ventotto, ventinove

German: einundzwanzig, zweiundzwanzig, dreiundzwanzig, vierundzwanzig, fünfundzwanzig, sechsundzwanzig, siebenundzwanzig, achtundzwanzig, neunundzwanzig

Spanish: veintiún, veintidós, veintitrés, veinticuatro, veinticinco, veintiséis, veintisiete, veintiocho, veintinueve

French: vingt et un, vingt-deux, vingt-trois, vingt-quatre, vingt-cinc, vingt-six, vingt-sept, vingt-huit, vingt-neuf