Saintis Muda Rendah 09

7/27/2019 Saintis Muda Rendah 09

1/10

STATION 1

TIME ALLOCATED : 10 minutes

THE MAGIC OF RED CABBAGE

Red cabbage contains a pigment molecule called flavin (an anthocyanin). Very acidic

solutions will turn anthocyanin to a red color. Neutral solutions result in a purplish color.Alkaline solutions appear in greenish-yellow.

MATERIALS/ APPARATUS

50ml beaker, 250 ml Beaker, test tube, test tube rack, dropper, knife, white tile, red

cabbage, hot distilled water, substance P, Q, R, S and T.

INSTRUCTIONS

1. Chop the red cabbage.2. Put them into the 50 ml beaker.

3. Pour some hot water until the red cabbage immerse.

4. Wait until the colour leach out of the cabbage.5. Use the liquid produced to test the pH of substance P, Q, R, S and T.
http://www.sciencedaily.com/images/2008/03/080307081409-large.jpg


2/10

STATION 1

GROUP NO: .

QUESTIONS:

1. Observation:

Substance Colour after reaction with red cabbage liquid

P

Q

R

S

T

[5 marks]

2. Below is a table of approximate colors of red cabbage indicator solution at differentpH. Arrange substance P, Q, R, S and T according to their pH in ascending order.

pH 2 4 6 8 10 12

Color Red Purple Violet Blue Blue-Green Greenish Yellow

[2 marks]

3. Write 2 properties of acidic and alkaline substances.

Acidic substances Alkaline substances

[4 marks]

4. Give 2 examples of alkaline substances that can be found in your bathroom.

[2 marks]


3/10

STATION 2


WATER FILTRATION SYSTEM

Water is very important in our life. Most of us are lucky to be living in a place whereclean water can be found easily. But for the people living in the rural areas, having clean

water for their families are quite difficult. Help them to build their own water filtration

system.


Filter funnel, conical flask, filter paper, fine sand, cotton wool, coarse sand, fine stone,pebbles, dirty pond water

INSTRUCTIONS

1. Build your own water filter by arranging the given materials inside the filter

funnel so that the pond water comes out clean.2. Make sure that all the materials are clean. Wash them if necessary.


4/10

STATION 2

GROUP NO: .

QUESTIONS:

1. Draw and label your water filtration system in the space provided.

[10 marks]

2. What is the colour of the filtered water?

[1 mark]

3. The filtered water does not remove microorganisms. Give one way that can be used to

remove them.

[1 mark]

4. List 4 natural sources of water.

(i) .. (ii) .

(iii) . (iv)

.


5/10

[4 marks]

STATION 3


SPECTRUM OF COLOURS

The light from the Sun may appear white but it actually consists of a mixture of colours.The white light can be separated into its component colours.


Torchlight, glass prism, white screen, pencil colour, red filter, green filter, blue filter.

INSTRUCTIONS

1. Switch on the torchlight and direct it towards the glass prism.

2. Adjust the position of the light until colours of light are seen on the screen.

3. Repeat procedure 1-2 by placing a red filter, green filter and blue filter.


6/10

STATION 3

GROUP NO: .

QUESTIONS:

1. Based on your observation, colour the spectrum of white light after passing through the

glass prism. (From above view)

[7 marks]

2. Write your observation when the red, green and blue filter is placed in front of the

torchlight.

Colours of light directed towards the

glass prism

Colours of light on the screen.

Red

Green

Blue

[3 marks]

3. Name one phenomenon that shows spectrum of colours in our daily life.

..[1 mark]

4. What is the approximate time that we can see the sky red?

[1 mark]

White light

Glass prism

White screen


7/10

STATION 4


THE SOLAR SYSTEM

The Solar System is the name given to the Sun and all the bodies that move around the

Sun. At present, there are nine known planets moves around the Sun.


Metre rule

INSTRUCTIONS

1. The model of distance of planets from the Sun is build outside the laboratory2. The ratio of the scale to the original distance is 1 mm : 1 million km.

3. By using the metre rule, estimate the distance of each planet from the Sun.
http://www.bvsd.org/schools/Angevine/teachers/thompson/Images1/solar%20system.jpg


8/10


9/10

STATION 5


THE SKYDIVER

As the skydiver jumps from the plane, the force acting on him is his weight. He had to

open his parachute quickly so that he could slow down and avoid serious injuries.


Metre rule, garbage plastic, thread, load, stopwatch, scissors, cellophane tape.

INSTRUCTIONS

1. Cut the plastic bag so that you can make a circle with a diameter of 50 cm.

2. Cut the thread to a length of 40cm.3. Tie it to the circular plastic to make a parachute of 6 strings.4. Put 40 g load to the parachute.

5. Go to the 3rd floor. Let it fly down. Record the time taken.

6. Repeat procedure 4-5 with, 60 and 80 g load.
http://images.google.com.my/imgres?imgurl=http://www.gifs.net/Animation11/Sports/Air_Sports/Parachutist_2.gif&imgrefurl=http://www.gifs.net/subcategory/372/0/20/Air_Sports&usg=__4AkYoO0Q8so1e3zlc1bUnz_UIC8=&h=142&w=111&sz=9&hl=en&start=4&tbnid=ubpU8PTSCf0RZM:&tbnh=94&tbnw=73&prev=/images%3Fq%3DPARACHUTIST%26gbv%3D2%26hl%3Den%26sa%3DG


10/10

STATION 5

GROUP NO: .

QUESTIONS:

1. In this investigation, state

i) what is changed.

ii) what is kept the same.

iii) what is observed.

[3 marks]

2. Tabulate your result in the table below.

[6 marks]

3. If a thin man and a fat man used the same parachute to jump from a plane, predict

which of them will land first. Give your reason.

[2 marks]

4. Suggest one way to make the parachute fly down slower to the ground.

[1 mark]

Mass of load (g) Time taken to reach the ground (s)

Saintis Muda Rendah 09

Documents

Transcript of Saintis Muda Rendah 09