Promoted to grade 6

On Saturday, 15 June 2013 I went to my school again to take my report card. I went there with my mom, my dad, and my sister. First, I went to my class first, 5B class. And I and my family have to wait first because there's still my friends that also waiting for taking their own report card that come faster than us. My mom and my dad take photos first. Until there's no people that taking their report card, my mom and dad come in first. Then I also went in to my classroom and see my homeroom teacher, Ms. Melly and Ms. Laura is speaking with my parents. Then my parents asked my rank and my teachers said that my rank is the 5th.

Then I take photo with m teachers and say goodbye to my teachers. Then, Nathan's mom gave us pmpek for us. Then we went to my sister's classroom and we also wait first. And when already our turn, my mom, dad, and sister went in to my sister's classroom but I wait outside. And when already finish, I went to Bellanova first then I go home.

Thank you all of my teachers that teach me in grade 5 that guide me to become a better person and also to all my friends that already accompany me for a year. Thank you.

Grade 5b : 13 June 2013

5B - 13 June 2013

Frictional Force

What is Frictional Force ?

Friction also can makes heat

Frictional force is a force that opposes motions. It is produce when there is two surfaces are rub against each other. Frictional force’s direction is the opposite of the object’s direction. Friction also can makes heat.

The Effects of Frictional Forces

• Slows down or stops a moving objects
• Prevent an object from starting to moves
• Affects the movement of objects on different surfaces

Frictional Forces Slows Down or Stops Moving Object

• Friction can slows down a moving objects or maybe stops it
• If there is no friction, a moving object will cannot slows down and stop

Frictional Forces Prevent an Object from Starting to Moves

• Friction can prevent an object to move
• If we want to move the objects, we must overcome it’s friction first
• The way to overcome friction is giving more force

Frictional Force Affects the Movement of Objects on Different Surfaces

• Friction can affects the movement of an objects on different surfaces
• Usually the rougher the surface, the bigger frictional force are there
• And the smoother the surface, the smaller the frictional force are there 

Resistances

• Air Resistance
• Water Resistance

What is Air Resistance?

The frictional force that acts on object trough air is called air resistance. Air resistance pushes against a moving objects and slows it down.

Frictional Forces in Everyday life

• Frictional force can be useful
• Frictional force can cause problems

Frictional Force that is Useful

• Friction are useful for our daily live
• If there is no grip, we will slip and slide away
• If there is no friction, we will may not able to stop moving objects

Frictional Force that Makes Problems

• Frictional force also can make problems such as :
• Slows a moving object down
• Causes engines to overheat
• Tyres wear out 

Ways to Reduce Friction

Use for example :

• Lubricants 
• Rollers and wheels

D e m o :

Rotation Period Of The Planet In Solar System

• Sun : 25.379995 days
• Mercury : 58.6462 days
• Venus : -243.0187 day
• Earth: 0.99726968 days
• Mars: 1.02595675 days
• Jupiter: 0.41007 days
• Saturn: 0426 days    
• Uranus: -0.71833 days     
• Neptune: 0.67125 days

Rotation Periode of The Planet in Solar System

Unique facts of Mercury

Mercury

1. Side of Mercury never seen.
2. Mercury has a magnetic field.
3. There may be ice on Mercury.
4. Mercury has an atmosphere.
5. Hubble telescope can not see to the Mercury.

Unique facts of Venus

VENUS

• Venus is really a twin Earth.
• Venus has no natural satellites.
• Venus rotates clockwise.
•  People thought that Venus was tropical.
• Venus atmosphere hostile.

Unique facts Earth

1. Earth is the only planet known to have life.
2. 70% of the Earth's surface is water.
3. Earth is almost spherical.
4. Earth's atmosphere extends to 10,000 Km.
5. One Day on Earth does not take 24 hours.

Earth

Unique facts Mars

Mars

1. Mars was very small.
2. Mars has the highest mountain in the solar system.
3. Mars has almost no atmosphere.
4. One of the natural satellites of Mars will collide with Mars.
5. Mars actually has water.

Jupiter unique facts

Jupiter

1. Jupiter is the planet with the fastest rotation period in solar system.
2. Jupiter has rings.
3. Jupiter has 63 natural satellites.
4. Jupiter's atmosphere is only 50 km thick.
5. Jupiter is the largest planet in the solar system.

Unique facts Saturn

Saturn

• Saturn is the planet with the smallest density in the solar system.
• Saturn has 60 natural satellites.
• Saturn also has a ring.
• Saturn's rings sometimes can not be seen / lost.
• Saturn is like a ball of compressed gas.

Unique facts Uranus

• Uranus is the coldest planet in the solar system.
• Uranus has 27 natural satellites.
• Uranus has rings.
• Uranus is the planet with the density of the second smallest in    the solar system.
• Actually, the planet Uranus was smelly.

Unique facts of Neptune

Neptune Size Earth Comparison

• Neptune is the farthest planet.
• Neptune is the smallest gas planet in the solar system.
• Neptune is the windiest planet in the solar system.
• Neptune gravitational force is almost the same as Earth's gravity.
• Natural satellite of Neptune, Triton colder than Neptune.