Revision On Matter

Matter Has mass Amount of matter in the object Unit : kg or g Measured by electronic balance.

Matter Occupies space Volume: Amount of space occupied by the matter. ml and l (for liquid) cm3(for solid, liquid and gas) 1 ml = 1 cm3 Measured using measuring cylinder

Question 1 Which sphere has the greatest amount of matter? Iron sphere has a greater amount of matter because it has a greater mass Note : It is not the size of the object. It is the mass that determines the matter in the object. 200 g 100 g 500 g

Question 2: Marble A and Marble B have the same volume but different mass. I can place 10 marbles A in the box. How many marbles B can I place in the box? I can still place 10 marbles B in the box as both A and B has the same volume Note : This is a “volume” question. The amount of space occupies by an object is not determined by the mass. A 3 g B 9 g

Which is heavier? Inflated Balloon (with air) Deflated Balloon (with no air) Inflated balloon will be heavier because there is air and air has mass.

Question 3: Is sound a matter ? Why Sound is not a matter because it does have mass and does not occupies space Is the laptop a matter ? Why A laptop is a matter because it has mass and occupies space.

Draw the water level when the cup is pushed into the basin of water. Explain. No water will enter the cup because there is air trapped in the cup. Air occupies the space in the cup and the water cannot enter the cup. Note : This is a “classic” experiment to show the air occupies space. If there is hole made in the cup, water will enter the cup because the trapped air escapes. Water level in the cup rises while the water level in the basin drops. The water from the container will rush in to the cup occupy the space.

What will happen when air is blown through the tube to the glass.? Explain (Pg 58) The water level in the glass drops while the water level in the container rise. Air enter the glass and air occupies the space. Therefore, the water will leave the glass and enter the container.

What do you think? Larger objects have greater masses! I don’t think so!

(Water) (Air) Marble

What is wrong with this statement? Milk is a liquid because it takes up space and has mass. All matter (including liquid) takes up space and have mass. We can only say that milk is a matter because it takes up space and has mass.

Definite Fixed and cannot be changed

Definite Shape When the object is put into different container, the object does not take the shape of the container. The shape does not change. Therefore, the object has definite shape. Note: The point highlighted in red is the observation and the point highlighted in blue is the inference.

No Definite Shape When the object is put into different container, the object takes the shape of the container. The shape change. Therefore, the object has no definite shape. Note: The point highlighted in red is the observation and the point highlighted in blue is the inference.

Definite Volume When the object is squeezed or pressed, the object occupies the same space. The volume does not change and cannot be compressed. Therefore, the object has definite volume. Note: The point highlighted in red is the observation and the point highlighted in blue is the inference.

No Definite Volume When the object is squeezed or pressed, the object does not occupy the same space. The volume changes and can be compressed. Therefore, the object has no definite volume. Note: The point highlighted in red is the observation and the point highlighted in blue is the inference.

Can the plunger of the syringe be pushed? Why? It cannot be pushed because milk is a liquid. It has definite volume and cannot be compressed. Syringe Plunger