THE RESPIRATORY SYSTEM 3r
The respiratory system is a group of organs that work together to help us breathe.
+ We breathe in air through our nose and mouth.
+ The air goes down into our lungs.
+ Oxygen is passed to the circulatory system, where it moves around the body.
+ We breathe in oxygen and breathe out carbon dioxide.
How our eyes and ears work
Our brain is the control centre of our body. It reads signals from our eyes and ears and tell us what we can see and hear.
How do we see things?
1. Light reflects off an object and enters the eye through the pupil.
2. The light goes through the lens and makes an image on the retina at the back of the eye. The image is upside down.
3. The retina sends the information to the brain.
4. The brain reads the signals and tells us what we can see.
How do we hear things?
1. Sound waves enter through the outer ear.
2. The waves hit the eardrum in the middle ear and make it vibrate.
3. This makes the liquid in the inner ear move and send signals to the brain.
4. The brain reads the signals and tells us what we can hear.
THE CIRCULATORY SYSTEM
The circulatory system consists of the heart, blood vessels and blood. It moves blood through the heart and around the body. Blood gives our cells the oxygen and nutrients they need. Blood also collects waste products, such carbon dioxide, and takes them to the parts of the body which expel them.
THE DIGESTIVE SYSTEM
The digestive system allows our body to get the nutrients it needs. Digestion begins in the mouth. The food then travels down the oesophagus and into the stomach. The small intestine separates the nutrients from the waste. The nutrients pass to the circulatory system and travel to all the body cells. The waste passes to the large intestine and leaves the body through the anus.
WE ARE EUROPEAN PEOPLE
PORTUGAL
Portugal is in the south of Europe.
It’s a small country.
Its capital is Lisbon.
The flag is red and green.
It’s hot in summer and cold in winter.
It rains a lot in the north of Portugal. It’s dry in the south of Portugal.
They grow potatoes, tomatoes and grapes in Portugal.
Rare Supermoon
Lunar Eclipse
A lunar eclipse occurs when the Moon passes through the shadow of the Earth. During this type of eclipse the Moon appears to be a reddish color. This type of eclipse can only occur during a full moon. During ancient times, an eclipse was scary because people used the Moon and Sun to tell time and seasons. When the Moon’s appearance made a drastic change, people really did not know what to expect.
How a lunar eclipse happens
| Interesting Lunar Eclipse Facts: |
| Some lunar eclipse can last up to 3 hour and 45 minutes. |
| Usually eclipses alternate from solar to lunar. |
| Three times a year is the maximum time a lunar eclipse usually occurs. |
| There are typically more solar eclipses than lunar eclipses per year. |
| There are three types of lunar eclipse: partial, full, and prenumbral. |
| During a partial lunar eclipse only a portion of the Moon passes through the Earth’s shadow. |
| A full lunar eclipse occurs when the Earth passes directly in front of a full moon. |
| When the Moon passes through the prenumbral shadow of the Earth, a prenumbral lunar eclipse has occurred. |
| The appearance or darkness of the Moon varies during a total lunar eclipse due to the variation in the composition of Earth’s atmosphere. |
| The Danjon Scale is a scale used to describe the darkness of a total lunar eclipse. |
| The Danjon Scale has 5 points that range from 0 (Moon appears almost invisible) to 4 (very bright yellowish orange). |
| It is not dangerous to look directly at the Moon during a lunar eclipse because the Moon is not giving off its own light. |
| In ancient times, a total lunar eclipse or disappearance of the Moon meant that the gods were angry with the people. |
| The word eclipse comes from the Greek word meaning downfall. |
|
More people on Earth can view a lunar eclipse than a solar eclipse. |
Lunar Eclipse
How Does a Lunar Eclipse Work?
Lunar Eclipses
What’s up for September 2015
