Showing posts with label Volcanoes. Show all posts
Showing posts with label Volcanoes. Show all posts

Thursday, February 6, 2014

Lava lake


A lava lake is a large crater or hole filled with lava.

Sometimes lava lakes happen after an eruption that just fills up a crater,
and sometimes they happen because lava flows along the ground and fills up a hole.
lava lake
(from: wikipedia - lava lake)


Kid Facts - Blast from the past: Atom

Thursday, January 30, 2014

Lava Fountain


A lava fountain is like a big fountain of lava erupting from a fissure vent.

lava fountain
(from: wikipedia - lava)


Kid Facts - Blast from the past: Binary

Thursday, January 23, 2014

Mud Volcano


Mud volcanoes are not like other volcanoes because they do not erupt lava.

But they have similar shape, and they do erupt with hot muddy water!
mud volcano
(from: wikipedia - mud volcano)


Kid Facts - Blast from the past: And Or Logic Gates

Thursday, January 16, 2014

Submarine Volcano


Sometimes volcanoes are underwater!

An underwater volcano is called a submarine volcano.

submarine volcano
(from: wikipedia - submarine volcano)


Kid Facts - Blast from the past: Boolean True False

Saturday, January 11, 2014

Lunar Lava Tube


We just learned how lava tubes on earth are tunnels underground formed by lava channels.

There are also lava tubes on the moon!

Scientists think they could make great places for astronauts to live if we ever have people stay on the moon.

lunar lava tube
(from: wikipedia - lunar lava tube)


Kid Facts - Blast from the past: Apollo 11 Moon Landing

Thursday, January 9, 2014

Volcanic Crater


A volcanic crater is a bowl shaped hole in the ground that was created by lava from a volcano.

Sometimes the crater is part of the inside of the volcano, but sometimes it's just a hole in the ground.

volcanic crater
(from: wikipedia - volcanic crater)


Kid Facts - Blast from the past: ROY G BIV

Thursday, January 2, 2014

Lava Tube


After lava erupts from a volcano and is flowing in a lava channel, sometimes the top of the lava cools down and becomes hard, but there is still hot lava flowing underneath.

This makes a tunnel in the ground, called a lava tube.

lava tube
(from: wikipedia - lava tube)


Kid Facts - Blast from the past: Frequency

Thursday, December 26, 2013

Lava channel


A lava channel is like a river of flowing lava.

lava channel
(from: wikipedia - lava channel)


Kid Facts - Blast from the past: Waves and wavelength

Thursday, December 19, 2013

Fissure vent


Sometimes lava erupts right out of the ground, not from a large volcano.

When it comes up from a big crack in the ground it is called a fissure vent.
fissure vent
(from: wikipedia - fissure vent)


Kid Facts - Blast from the past: Light Year

Thursday, December 12, 2013

Shield Volcanoes


We learned before about stratovolcanoes and how they are tall and cone shaped.

When a volcano is much flatter, it's called a shield volcano.

Shield volcanoes are made up mostly of hardened lava flows.
shield volcano
(from: wikipedia - shield volcano)


Kid Facts - Blast from the past: Speed of Light

Saturday, December 7, 2013

Lunar Domes


We've learned about the moon's highlands, maria and rille.

What about volcanoes on the moon?

There are no active volcanoes there, but there are some old ones that we call lunar domes.

The lava from the volcanoes is what made the rilles that we already learned about,
and the dark maria areas are from when lava flowed long ago.

The lunar domes look like circle shaped lumps or holes on the moon.
lunar domes
(from: wikipedia - geology of the moon)


Kid Facts - Blast from the past: Explorer - 1

Thursday, December 5, 2013

Stratovolcano


Volcanoes come in different shapes and sizes.

If a volcano is tall and shaped like a cone, it is usually made up of hardened tephra, lava and ash.

We call that type a stratovolcano.
mayon stratovolcano
(from: wikipedia - stratovolcano)



Kid Facts - Blast from the past: Speed of Sound

Thursday, November 28, 2013

Pillow Lava


Sometimes volcanoes can be underwater!

When they erupt, they make what is called pillow lava, because the lava rocks end up looking like pillows.
pillow lava
(from: wikipedia - pillow lava)


Kid Facts - Blast from the past: Sound Waves

Thursday, November 21, 2013

Igneous Rocks


When hot lava cools down and turns into rock,
that type of rock is called igneous rock.

igneous rock
(from: wikipedia - igneous rock)



Kid Facts - Blast from the past: Batteries - Positive & Negative

Thursday, November 14, 2013

Volcanic Ash


Volcanic Ash is the smoky cloud that comes up from a volcano when it erupts.
Even though it just looks like smoke or steam,
the ash is actually made up of tiny bits of rock that are floating through the air.

mount redoubt volcanic ash
(from: wikipedia - volcanic ash)

Volcanic Ash isn't like lava where it will melt everything in it's path,
but it can shoot out and cover areas for almost a thousand miles.
It can make animals or people sick, and just make a big mess covering everything up in a black mush.

Kid Facts - Blast from the past: USB

Thursday, November 7, 2013

Tephra


When volcanoes erupt, sometimes they shoot out pieces of rock in the air.

These rocks are called tephra.

tephra
(from: wikipedia - tephra)

Sometimes volcanoes can shoot rocks almost a mile away from the eruption!



Kid Facts - Blast from the past: Text Messages

Thursday, October 31, 2013

Lava domes


Lava domes are kind of like big round bumps that show up in volcanoes, when lava is slowly erupting.

You can almost think of it like a big rock bubble that is ready to pop!
lava dome
(from: wikipedia - lava dome)


Kid Facts - Blast from the past: Car Ignition

Thursday, October 24, 2013

Pāhoehoe lava


We just learned that ʻAʻā lava is a type of lava with big chunks of rock floating in it.

Another type of lava is called Pāhoehoe, pronounced like pah-ho-ee ho-ee.

Pāhoehoe lava is smooth and looks almost like rope or some sort of gooey thick stuff.
pahoehoe
(from: wikipedia - lava)


Kid Facts - Blast from the past: Spark Plug

Thursday, October 17, 2013

ʻAʻā Lava


Did you know that there are different types of lava?

One type of lava is called ʻAʻā, pronounced like ah ah.

ʻAʻā means rough, stoney lava.
The lava looks rough, and has blocks in it that are called clinkers.

aa lava
(from: wikipedia - lava)



Kid Facts - Blast from the past: Muffler

Thursday, October 10, 2013

Magma


We learned that when a volcano erupts, it shoots out lava which is melted rock.

But where does that lava come from?

Underneath the ground below the volcano, the melted rock is called magma.
pahoehoe
(from: wikipedia - magma)

Once it shoots out from the volcano we call it lava, but underground it is called magma.

Kid Facts - Blast from the past: Pistons