Preparation for EOY

After much thought,I decided to blog on the few main points and topics to take note of in Term 1 and Term 2 so as to get myself ready for the EOY Science examination.

Self reflection

After 3 term of lower secondary science lessons,I found out that I had learnt much and also attend some valuable classes.I had also clear my doubts and through all the science lessons and experiment,I had gained alot of knowledge.Especially the experiment, which was done and experienced by myself and thus, the lessons learnt will have a deeper impression on me.The teacher had also clear my doubts with some detailed answers.


I have received my Term 3 Science test and I had improved slightly abit.
Even though the marks improved just by 0.5 to 1 mark,I think it's still a good sign.
I found out that I had improved due to
-copying of notes in class and revise when I went home
-blogging what I have learnt so as to give me a deeper impression

The method is very effective and I think that I shall continue this method so as to achieve better grades in the future.

Lesson learnt on 16 August

Today,we started on a new topic called:Respiration

Respiration is the process by which food molecules are broken down to release energy.It occurs in all cells.

Respiration can be broken down to Aerobic Respiration, which can be broken down to Tissue Respiation and External Respiration.

Aerobic respiration is the process where food substances are broken down in the presence of oxygen, and energy is released in living cells.

The Aerobic Respiration can be summarised by the following equation:
Glucose+oxygen ----------->Carbon Dioxide+water+energy

Tissue Respiration is the process whereby food substances are broken down in living cells.Large amount of energy is released for the cells.

External Respiration is the bringing of the oxygen from the surrounding environment to the cells for tissue respiration to happen.

It helps to remove carbon dioxide and the water formed during tissue respiration from the body.

Breathing is also part of external respiration.

Breathing
-Movements that bring about exchange of gases between body and its surroundings.
-Movements that brings air into and out of the body.
-Air that we breathe in is called inhaled air whereas air that we breathe out is called exhaled air.

Inhaled air Exhaled air
-Contains 21% oxygen -Contains 16% oxygen
-Contains 0.03% of carbon dioxide -Contains about 4% of carbon dioxide
-Contains less water vapour -Contains more water vapour


Breathe in Breathe out
-Diaphragm contracts and flattens -Diaphragm relaxes and arches up
-Rib muscles contract -Rib muscles relax
-Ribcage expands and moves up -Ribcage contracts and moves down

Reflection
After learning more about respiration and also breathing, I knew more about the surrounding air and particularly my breathing.I had also know more about the different types of breathing and respiration too.
These knowledge is useful as I know more about the different components needed for the processes to happen, example water. Thus, i will make sure I drink ample water to allow respiration to happen.

Lesson learnt on 26 and 27 July

On 26 July,we learnt about a new topic called Photosynthesis.

Photosynthesis is a biochemical process in which plants,algae and some bacteria harness the energy of light to produce food.

An important role of Photosynthesis is production.Carbohydrates are formed during Photosynthesis.From carbonhydrates,fats and proteins are formed in plants.

The word equation of Photosynthesis is as follows:

Carbon Dioxide + water ---chlorophyll and light energy----> Glucose + Oxygen

Conditions for Photosynthesis:
-Presence of sunlight
-Presence of Carbon Dioxide
-Presence of chlorophyll
-Temperature
-Water

A variegated leaf is a leaf that is partially green and partially without chlorophyll.It's used to investigate the importance of chlorophyll in starch formation.

Photosynthesis help to purify the air by restoring the level of oxygen and carbon dioxide in the air.

On 27 July,we did an experiment to find out the presense of starch in the leafs and go through some practical as well.

Reflections
After learning the topic Photosynthesis, I had learnt more about the requirements needed for photosynthesis to happen. Thus I will be more aware when I grow plants so as to let them receive sunlight,water to ensure photosynthesis to happen for them to survive.
After I learnt the gaseous exchange in photosynthesis, I could also apply this and put the plant in my room when there is sunlight. This way, my room will become fresher.

Lesson learnt on 20 July

Today,our class had a quiz on the topic "Cells,tissues.organs and systems".

Some of the facts that I learnt after the quiz:
-Supporting tissue found in the plant help to support and strengthen a plant.
-Excretion removes waste material from living cell.
That's all ^^

Lesson learnt on 19 July

Today, we learnt about organs and organ system.Organs are structures made up of different tissues working together for a a specific function whereas organ system consists of several organs working together to perform a special function ex:the digestive system.

Organs of Plant
-Leaf
An organ of photosynthesis (contains photosynthetic tissues)
-Stem
Contain xylem and phloem tissues and supporting tissues.
Provide support and transport food to other parts of the plants.
-Roots
Xylem tissues take in the nutrients from the roots and transport them to other parts of the plant.
Serve to anchor the plants to the soil and absorb water and dissolved minerals.

Organs of Animal
-Stomach
Contains glandular tissues which secrete digestive juices to digest food.
Contains muscle tissues which causes stomach to contract and relax and mix the food well with the digestive juices.
Contains connective juices which helps to connect other tissues.
-Heart
Circulates blood around the body.
Consist of blood tissue.
Contains muscle tissue which causes heart to contract and expand to circulate blood.
Contains connective tissues which helps to connect the other tissues.

Organ system in animals
-Respiratory system
Consists of lungs,windpipe and mouth.
Supplies the body with oxygen and remove carbon dioxide.
Allows animal to breathe in order to carry out respiration.
-Digestive system
Breaks down food into smaller and soluble substances that can be absorbed by the blood.
-Circulatory system
Made up of heart,capillaries,arteries and veins.
Aloows animal to circulate blood around the body so that different parts of the body will receive food,oxygen.

Lesson learnt on 13 july

Today we went to the lab and did an interesting experiment.We experiment with our cheek cells and also the onion cells and even had the chance to use the microscope ourselves!!!it's enriching and we had a fun time too.

After the experiment,Mrs Chu continued to teach the topic where she left yesterday.

Connective Tissues are divided into 4 main groups which are as follows :

Dense Tissue forms ligaments and tendons.It's densely packed and have great tensile strength.

Loose Tissue helps to hold organs in place.

Reticular Tissue is a network of reticular fibers ( fine collagen ) that forms a soft skeleton to support the lymphoid organs ( lymph nodes,bone marrow and spleen ).

Adipose Tissue is used for cushioning,thermal insulation and energy storage.



Nerve Tissue is to make up the nervous system that carry information within the body.

Glandular Tissue forms gland that produces substances to secrete hormones and sweat.