Volume Of Liquid - Introduction

Volume of liquid is the amount of space occupied by liquid.

For example, a bottle half filled with water, a tea pot fully filled with tea and others. These are volume.

(The empty spaces in this bottle can be filled by liquid)

(The volume is not necessarily the same for each bottle)




If an object (for example, a bottle) is big, it has more volume, so it can hold more amount of water.

Now, look at the picture below, if all bottles are filled with waters, which bottle has the most volume and which bottle has the least volume?

Answer:
The first bottle from left is the smallest, therefore, it has the least volume.

The last bottle from left is the biggest, so it has the most volume among all the bottles shown above.


In the next topic, we will discuss about the units of volume. Thank you.

Mass - Applying Mass

In previous entry, you have learned about Mass. Do you know we have units to measure Mass?

The basic unit for Mass is gram (g):

1 kilogram (kg) = 1000 gram (g)


There are many equipments to measure Mass. Some of these equipments are:

(Weight Balance)

(Triple Beam Balance)

 (Mechanical Scale)






Now, if a book is weighted at 50 grams while a brick is weighted at 200 grams. How many books are needed so that the weight is the same as a brick?

Solution:
1 Brick = 200 g
1 book = 50 g

50 g X ? = 200 g

50 g + 50 g + 50 g + 50 g = 200 g

So, it becomes:

50 g X 4 = 200 g

Answer:
4 books are needed to weight the same as a brick.


That's all for today. Thank you.

Mass - Introduction

Today we will learn about a new topic - Mass.

Mass is the amount of matter in an object. The more matter in an object, the heavier the object will be. The less matter in an object, the lighter the object will be.

For example:

Try to move a wooden table. After that try to move a wooden chair. Which one is easier to move?

It should be the wooden chair because the wooden table has more mass than a wooden chair.


Another example:

Try to lift a brick. After that, try to lift a small bag of sand. Which one is easier to lift?

It should be the small bag of sand because the small bag of sand is lighter than a brick.


Now you get the idea of mass and how to compare them. Before we end our lesson for today, look at the picture below. Which one has more mass? The stones or the water?

Answer: The Stones because in the picture shown, there Stones are heavier than the water. Hence, when Stones are heavier than water, this means stones have more mass than water.

That is all for today. Thank you.

Length - Applying Length

In the previous posting, you have learned about length. Now you will about units of length and how to apply them.

The units of length in this topic are: Meter (m), Centimeter (cm)

1 Meters (m) = 100 Centimeters (cm)

To convert an object with 3 meters of length into centimeters, you just need to multiply the number (in this case, 3) with 100. For example:

A length of a 'wau' is 1 meter. How long is the length of it in centimeters?
1m X 100 = 100cm

So, the 'wau' is 100 centimeters in length.


Now you try:

Imagine Ruler A is 1 meters long. Ruler B is half of the length of Ruler A. Ruler C is 30 centimeters.Between Ruler B and Ruler C, which one is longer?

Answer:

Ruler A is 1 meters long.
Ruler A: 1m X 100 = 100cm

Ruler B is half the length of Ruler A.
Ruler B: Length of Ruler A ÷ 2
Ruler B: 100cm ÷ 2 = 50cm

Ruler C is 30cm long.

So Ruler B is 50cm, Ruler C is 30cm.

Ruler B is longer.

That is all for today. Thank you.

Length - Introduction

Good day. Today, we will learn about length.

Length is the distance measured between two points.


To get a basic idea, compare a ruler and a pencil. Which one is longer?

VS

As you normally seen, a ruler is longer than the pencil. So we can say the length of the ruler is more than the pencil.

Height (tall) and length (long) are similar. To get the idea:
1) Try compare your height between you and your friends, see who is taller?

2) Look at your hand. Which of your finger is the longest?


Now look at the picture below:

Which mountain is the tallest?

            Left Mountain                                Center Mountain                                Right Mountain

Thank you.

Time - Applying Time

You have learned about Time.

Today, we will learn how to apply Time in our daily lives.

There are a few things you must know about Time:

1 Day = 24 Hours
* Notice the short needle will rotate from 0 to 12 for 2 rounds to reach 24 Hours

1 Hour = 60 Minutes
* The long needle will rotate from 0 to 12 for 1 round to reach 60 Minutes

1 Minute = 60 Seconds
* The red needle will rotate from 0 to 12 for 1 round to reach 60 Seconds


To apply Time in our daily lives, here is an example:
Kamal got onto a bus ride from his house to school at 6.50 o'clock. The journey took 20 minutes. What time Kamal reached the school?

     06 50
+   00 20
     06 70 - BUT 1 Hour = 60 Minutes
So: 07 10 - 70 Minutes - 60 Minutes = 10 Minutes

Answer: Kamal reached the school at 7.10 o'clock.

If Raju went into the shop at 9.55 and came out 10.05, how long was he in the shop?

     10 05
-    09 55
     00 10 - 1 Hour = 60 Minutes

Step by step answer:
     09 65
-    09 55
     00 10

Answer: Raju was in the shop for 10 minutes.

Remember the lesson well. Thank you.

Time - Introduction

Greetings. Today, we will learn about Time.

Time is a measuring system used to:
1) Sequence events (Past events, Present events, Future events)
2) Compare durations of events
3) Compare the intervals between 2 or more events


Look at the clock below:

The time shown in the above can be written as:
1) Fifteen minutes past one or;
2) One fifteen
3) 1.45 (in numbers)

Now you try to write the examples below:

We will learn more about time in the next posting. Thank you.