And Or logic gates

Last time we learned about true and false
and how they worked in computers like On and Off switches
turning thousands of light bulbs on and off.


(from: wikipedia - incandescent light bulb)

Now think about what would happen if you had two light switches
called switch A and switch B,
and they were hooked up to the same light bulb.


(from: wikipedia - light switch)

Would you have to have both switches set to ON for it to turn on?
Or is just one good enough?

In computers and electronics, we call that using AND and OR.
So if you need both light switches ON to turn on one light bulb,
that means you need A AND B on.

If the light will turn ON with either switch,
that means A OR B.

When people draw out the AND and OR in pictures,
they sometimes call them logic gates. There are different pictures for an AND gate and an OR gate.

The AND gate sort of looks like a big letter D.

(from: wikipedia - and gate)

The OR gate sort of looks like a spaceship!

(from: wikipedia - OR)

Using those logic gates like switches to turn on and off light bulbs,
you can draw up big pictures that can be used as instructions for building a computer!

(from: wikipedia - logic diagram)

Komodo Dragon

We just learned about the Camel Humps.

The dragons you read about in stories aren't real,
but there is a real animal called the Komodo Dragon.

(from: wikipedia - komodo dragon)

It's the largest kind of lizard in the world,
and can grow to be up to 10 feet long!

That means if they stood on their tail
their nose could touch the rim of a basketball hoop!

Femur

The hip bone or pelvis connects to the thigh bone of your leg,
which is called the femur.

The femur is the longest, heaviest and strongest bone in the human body.

(from: wikipedia - femur)

Arctic ocean

We've learned about four other oceans so far,
in order of largest to smallest they are:
Pacific, Atlantic, Indian and Southern oceans.

The last one is the Arctic ocean

It's the ocean at the very top of the earth, where the North Pole is.

(from: wikipedia - arctic ocean)

Apostle's Creed - Part 7

We just learned about the Apostle's Creed Part 6.

Apostle's Creed

I believe in God, the Father Almighty, maker of heaven and earth.
And in Jesus Christ, his only Son, our Lord
who was conceived by the Holy Spirit, and born of the virgin Mary,
suffered under Pontius Pilate, was crucified, died and was buried.
He descended into hell. On the third day He rose again from the dead.
He ascended into heaven and sits at the right hand of God the Father Almighty.

Here's part 7:

From thence He will come to judge the living and the dead.


(from: wikipedia - apostle's creed)

ISS - International Space Station

We just learned about the Apollo 11 Moon Landing.

Right now up in outer space, there is a space station where astronauts can go and stay for days, weeks, even months!

(from: wikipedia - International Space Station)

It's called the International Space Station, or ISS for short.

Both Russia and the USA worked together to build the space station.

French - Green, blue, purple, pink

Last time we learned red orange and yellow,
in French is rouge orange and jaune.

Let's learn more colors!

Green - vert - sounds like vay-uh /?/
Blue - bleu - sounds like blue /?/
Purple - violet - sounds like vee-oh-lay /?/
Pink - rose - sounds like oo-ohs /?/