Experimental Sciences

Category Archives: Ms Madhu


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Making their own rivers

The students of Grade 7 made their own rivers by using mud, clay and some water. Through this activity, students learned the concept of river formation.

According to National Geographic society (source: https://www.nationalgeographic.org/encyclopedia/river/), rivers form when water falls down a mountain slope as a small stream. Rivers can have different sources, so they may be fed by water from rain or by melting snow and ice. Then, little by little, the small streams become bigger as more water flows through them.

The activity done by Grade 7 demonstrates this. By carefully pouring water from a small pail onto the mud and clay, students were able to observe how rivers naturally form.

Grade 7 StudentsBlog 4

The pictures above show Grade 7 students preparing the mud and clay by packing them together. They will, later on, pour some water onto the model. The students take note of the factors that affect the river’s shape, size, and appearance.

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The Density Column Experiment

The Density Column Experiment is an activity that introduces the concept of Density to students of science. Density if defined, is mass per unit volume. In other words, it is the relationship between the mass of a substance and the space it takes up. In many cases, if the volume taken up is the same, the denser substance would be heavier.

In this experiment, the students are asked to stack liquids on top of each other. This is done by looking up their density and putting in the heavier liquids into the container first before the lighter ones. The denser the liquid, the more it should sink.

Students stack liquid on top of each other by first placing the heaviest liquid in the bottom of the container and carefully dripping the lighter liquid on top of it.

Students stack liquid on top of each other by first placing the heaviest liquid in the bottom of the container and carefully dripping the lighter liquid on top of it.

The students work in a group to make sure that the liquid in the bottom is not disturbed by the action of dropping the lighter liquids on top of it.

The students work in a group to make sure that the liquid in the bottom is not disturbed by the action of dropping the lighter liquids on top of it.

The effect is as shown in this picture. The lighter liquids, if not disturbed are able to sit on top of the heavier ones without mixing together.

The effect is as shown in this picture. The lighter liquids, if not disturbed are able to sit on top of the heavier ones without mixing together.

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PAG-ASA Field Trip

PAGASA, which is also known as “The Philippine Atmospheric, Geophysical, and Astronomical Services Administration” is a government-mandated agency that provides information to the public in order to ensure the safety, well-being and economic security of the people of the Philippines. It also provides a wealth of information to the public to help them better understand meteorology, hydrology, climatology, astronomy and other geophysical sciences.

The computers in the picture told students how weather is predicted

Weather prediction by the use of different computers

Grade 8 and Grade 9 students, as well as their teachers Ms. Madhumita Saini and Ms. Marian Asuncion,  went to PAGASA to learn and understand how the organization predicts weather.

The students were accompanied by two of their science teachers

The students were accompanied by two of their science teachers

It is important for students to understand how weather is predicted because these predictions affect our day to day activities. Students should also understand that weather prediction is not as easy and as straightforward as it may appear to be.

One of the employees of PAGASA showed the students how a tipping bucket recorder worked. It is a rain gauge and it's considered as one of the most traditional tools used for weather station applications.

One of the employees of PAGASA showed the students how a tipping bucket recorder worked. It is a rain gauge and it’s considered as one of the most traditional tools used for weather station applications.

The Grade 9 students then learned how to correlate the weather predictions to benefit people with heart anomalies.

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Heat Transfer: Conduction, Convection and Radiation

Three different experiments were conducted by Grade 8 students to demonstrate heat transfer through conduction, convection, and radiation.

Conduction

To see the evidence of conduction, a spoon was heated by the use of boiling water. The difference in temperature of the boiling water, as well as the spoon, caused heat transfer between the two objects. After some time, the water and the spoon had the same temperature.

The spoon being heated up using boiling water

The spoon being heated up using boiling water

Convection

Convection is another method of heat transfer. It is due to the movement of a fluid (liquid or gas) between areas of different temperatures. In the experiment, the circular movement of the pencil shavings showed convection currents that occurred in hot water.

In this experiment, the spoon was removed and pencil shavings were placed into heated water. Due to the difference in temperatures of water from varying depths (surface/bottom), convection current occurred as evidence of the movement of the pencil shavings.

In this experiment, the spoon was removed and pencil shavings were placed into heated water. Due to the difference in temperatures of water from varying depths (surface/bottom), convection current occurred as evidence of the movement of the pencil shavings.

Radiation
This experiment was done by asking students to get close to the heat source. Students could feel the heat radiated by the hot plate.

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Skype a Scientist

Last Wednesday, November 29, 2017 grade 6JL and grade 6GT had the chance to experience talking with a real scientist via skype. He is Mr Jeffrey Schwartz, nanophysicist working with Interpol and University of California. Everyone had the chance to ask questions from the challenges faced by a scientist to atom related questions and inventions. Organized by Ms. Madhumita Saini. It was truly a fun experience for the kids who aspires to be a scientist.

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Disection of Pig’s Heart

Pig's heart dissection 1

Pig's heart dissection 2

Grade 12 did pig’s heart dissection to have a better understanding of the chambers and parts of the heart and blood vessels connected to it.​

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The Solar System

Phases of moon 1

Phases of moon 2

Phases of moon 3

Phases of moon 4

Phases of moon 5

Phases of moon 7Solar system brain storming 2

Solar system brain storming (1)

Grade 5 were learning about phases of moon and we did our hands on with oreo biscuits so that they could make different phases and eat it up later. Then we moved on to solar system. This picture shows how much the kids know about the solar system !

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The Gut Feeling (Biology Class)

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The Grade 12 Bio students are learning about digestion in their Physiology lesson. The experiment of dialysis tubing demonstrates how nutrients are absorbed from the intestine after food is digested. The dialysis tubing is selectively permeable, mimicking the cells lining the intestine that absorb the nutrients and transport it to the blood stream. In this experiment, starch and amylase are mixed and kept in the dialysis tubing. As a result of digestion, maltose is produced and that passes through the tubing into the water outside. Testing the maltose is done with Benedict’s solution.

  • http://www.deped.gov.ph/