Why is the ocean blue?











Level: Primary School

Aim: To explain the scientific reason for the blue ocean after teaching them the poem Washday by Elizabeth F. Upson

1.  You have learned how the seven colours of violet, indigo, blue, green, yellow, orange and red make the seven colours of the rainbow.

2.  You see a rainbow in the sky when sunlight is spread out by raindrops.

3.  Look around at the objects around you.

4.  What colours are they?

....................................................................

5.  Do you know why different objects seem to be of different colours?

.........................................................................

6.  Every object absorbs [soaks in] or reflects [throws back] light.

7.  The ocean seems blue to you as it reflects blue light and swallows up the rest of the colours.

8.  Sometimes the sea looks green because of the plants in it.

9.  Have you seen the sea glow with other colours?

..........................................................................................

10.              Deep down into the sea, you’ll find darkness only as light can’t reach so far.

 

Comments

Post a Comment

Popular posts from this blog

Image
  Octopus 1.     You may often have heard someone proudly saying that he has blue blood running through his veins. 2.     This figuratively means that he is the descendant of a royal dynasty. 3.     Did you know that a creature living in the deep blue ocean really has blue-coloured blood? 4.     We are talking about the mollusc, the eight-legged octopus here. 5.     Octopuses are natural marine architects which build homes for themselves with rocks. 6.     With their powerful arms, they can easily shift rocks from one venue to another. 7.     Their rock den abodes have a stone door entrance which the octopus can lock after it safely enters its sweet home. 8.     Even after they are securely at home, they are better off without visitors. 9.     They disperse shells and rocks to carefully conceal themselves within their dens. 10.                        After catching prey which comprises worms, crustaceans, molluscs, prawns and fish they retire to their dens to savour
Read more
Image
  Man consumes pesticide As I write this, a young man is fighting for his life. He is an alcoholic and is always in and out of jail. This morning he put pesticide in his spirit and drank it. His body is turning cold and he can hardly breathe. He is in a queue for admission to the hospital for the poor where detailed paperwork is going on as protocols dictate that a police case must be registered before further proceeding. These rules delay saving those who attempt suicide. We aren’t sure if this was accidental or deliberate mixing. The treatment of patients who try to take their lives is shocking in supposedly good private hospitals as well. In one of these places, the person who attempted it was slapped several times by the doctor and as he felt that an evil person like this deserves mistreatment, ward boys were ordered to strip her naked to change her into a gown as there was no nurse at the emergency room. In the case of domestic violence when a person tries to kill oneself, t
Read more
Image
  Word Meanings pollinate: to move or carry pollen to a plant, causing the seeds to be fertilized. The bees pollinated the clover. fragrance: a pleasant smell. The fragrance of roses filled the room. blossoms: the condition of bearing flowers (usually preceded by "in"). Cherry trees in blossom provide color in early spring. organic: produced or producing naturally, without using pesticides or other added chemicals. Many people believe organic food is healthier for people and for the environment. rustle: to cause to make a soft, hissing sound. Wind rustled the dry leaves. nectar: the sweet liquid a plant makes that attracts insects and birds. Bees use nectar to make honey. beverage: any liquid for drinking, except water or medicine. The back of the menu has a list of beverages, but I don't see apple juice there. flavour: the particular way something tastes multi-coloured: of or having many colors. plumes: a large, fluffy, colorful feathe
Read more