Aim: Our Investigation is about “Can Water Make Music?” Elizabeth and I chose to work on this project because we saw on TV someone make music with water and we wanted to test this out and find out for ourselves if we could use water to make a simple musical instrument.
Question: Can we make music using different levels of water in glass tumblers? And which level of water would make better music?
Hypothesis: We think that we can make music with water. We predict that the smallest amount of water in the glass tumbler would make a sharp sound and a nice tone.
Experiment
Equipment: 4 drinking glass tumblers
Water in each tumbler at a different level
Wooden stick such as a pencil
Procedure:
1.Line up each glass next to each other and fill them with different amounts of water.
2.The first glass should have a high amount of water and the last should have a small amount of water. The ones in between should have a slightly more water than the last one.
3.Tap the glass tumbler with the least amount of water and observe the sound, then do the same for the other glass tumblers.
4.Now tap all glass tumblers and in any order to see if you could make up a tune by just tapping them in order.
5.Observe which glass tumbler makes better music.
Observation: When we tapped each one to see which glass tumbler had a lovely sound, it turned out to be the glass with the least amount of water in it. Our hypothesis was correct.
Conclusion: From our experiment we learned that we can make music with water. It sounds quite good.
In India some musicians play this kind of musical instrument and make beautiful music with it. They call this musical instrument “Jal Tharang” (Water Music.
Wednesday 7 September 2011
Friday 2 September 2011
Invisible Shield!
Aim:To find out what happens to newspaper when it is in a container and is immersed in water.
Question:Would a sheet of newspaper placed in a container get wet when immersed in water?
Hypothesis:We think that the sheet of newspaper would get wet.
Experiment-Equipment:
• Sheet of newspaper
• Empty glass
• Bowl of water.
Procedure:
1. Crumple a sheet of newspaper and stuff it into an empty glass tightly.
2. Holding the glass bottom up, sink it deep into the bowl filled with water.
3. Hold it there for a minute or so.
4. Pull the glass out of the water and remove the paper.
5. Check to see if the paper got wet or remained dry.
Observation:We saw that the paper did not get wet but remained dry.
Conclusion:Water cannot get into the glass to make the paper wet because the empty glass is already filled with air, and the air cannot get out because it is lighter than water.
From this experiment we learned that newspaper in a glass tumbler gets an invisible shield and does not get wet in water.
Next Steps:To learn about the application of this investigation to other daily life situations.
Question:Would a sheet of newspaper placed in a container get wet when immersed in water?
Hypothesis:We think that the sheet of newspaper would get wet.
Experiment-Equipment:
• Sheet of newspaper
• Empty glass
• Bowl of water.
Procedure:
1. Crumple a sheet of newspaper and stuff it into an empty glass tightly.
2. Holding the glass bottom up, sink it deep into the bowl filled with water.
3. Hold it there for a minute or so.
4. Pull the glass out of the water and remove the paper.
5. Check to see if the paper got wet or remained dry.
Observation:We saw that the paper did not get wet but remained dry.
Conclusion:Water cannot get into the glass to make the paper wet because the empty glass is already filled with air, and the air cannot get out because it is lighter than water.
From this experiment we learned that newspaper in a glass tumbler gets an invisible shield and does not get wet in water.
Next Steps:To learn about the application of this investigation to other daily life situations.
Magic, Illusion or Trickery
Aim:To understand why we see red and blue when the only colours on the disc are black and white.
Question:Why do we see red and blue when the only colours on our disc are black and white?
Hypothesis:We think that when we spin the disk, the patterns on it might still look black and white.
Experiment - Equipment
• White paper
• Scissors
• Black vivid
• Cardboard
• Straight pin
• Pencil with an eraser.
Procedure:
1) Cut a circle four inches (10 cm) in diameter out of white paper.
2) Colour one half black.
3) Divide the white half into four equal parts.
4) In each segment draw three black arcs about ¾ inches (19 mm) thick.
5) Cut a circle four inches (10 cm) in diameter out of the cardboard.
6) Place the paper circle on the cardboard circle.
7) Mount them together on a pin, attach to a pencil with an eraser.
8) Revolve the disk at various speeds, clockwise and anti clockwise.
Observation:The arcs seem to close up to form 6 rings. At a slow speed, spinning clockwise, the outer rings look blue and the inner rings look red. When we spun them anti-clockwise, the colours reversed.
Conclusion:Our hypothesis was incorrect. We could see the arcs in red and blue.
The arcs seem to close to form rings, because the eye continues to see each arc for a short time after it has disappeared.
What actually happens is that we see red and blue when the only colours on the disc are black and white. The entire colour spectrum is present in white light, but our eyes register the different lengths of time.
When we spin the disk, light from the colours that make up white reach the eye, but are visible for only an instant before being followed by the black portions of the disk. Our eye is only able register a part of that colour spectrum-the blue, which has the shortest rays, and the red, which has the longest rays.
Question:Why do we see red and blue when the only colours on our disc are black and white?
Hypothesis:We think that when we spin the disk, the patterns on it might still look black and white.
Experiment - Equipment
• White paper
• Scissors
• Black vivid
• Cardboard
• Straight pin
• Pencil with an eraser.
Procedure:
1) Cut a circle four inches (10 cm) in diameter out of white paper.
2) Colour one half black.
3) Divide the white half into four equal parts.
4) In each segment draw three black arcs about ¾ inches (19 mm) thick.
5) Cut a circle four inches (10 cm) in diameter out of the cardboard.
6) Place the paper circle on the cardboard circle.
7) Mount them together on a pin, attach to a pencil with an eraser.
8) Revolve the disk at various speeds, clockwise and anti clockwise.
Observation:The arcs seem to close up to form 6 rings. At a slow speed, spinning clockwise, the outer rings look blue and the inner rings look red. When we spun them anti-clockwise, the colours reversed.
Conclusion:Our hypothesis was incorrect. We could see the arcs in red and blue.
The arcs seem to close to form rings, because the eye continues to see each arc for a short time after it has disappeared.
What actually happens is that we see red and blue when the only colours on the disc are black and white. The entire colour spectrum is present in white light, but our eyes register the different lengths of time.
When we spin the disk, light from the colours that make up white reach the eye, but are visible for only an instant before being followed by the black portions of the disk. Our eye is only able register a part of that colour spectrum-the blue, which has the shortest rays, and the red, which has the longest rays.
Bending Water
Aim:To find out if we can bend water, and if so how?
Question:How do you possibly bend water? Can you do it?
Hypothesis: We don’t think we can bend water.
Experiment - Equipment
If you are going to bend water you will need...
• A nylon comb
• A stream of water out of the tap
• Dry hair
Procedure:
1. Turn on the water so it is falling from the tap in a narrow stream (just a few millimetres across but not droplets.)
2. Run the comb through your hair just as you normally would when brushing it. (do this several times)
3. Move the comb closer to the stream of water from the tap
4. Slowly bring the teeth of the comb near the stream of water, about 3 or 4 inches below the faucet.
5. When the teeth of the comb are about an inch or less away from the stream, the stream will bend towards the comb.
Observation: After running the nylon comb through our hair, the hairs on our head stood on end.
When the teeth of the comb were placed about an inch or less away from the stream of water, the stream of water bent towards the comb.
Conclusion: When you comb your hair with a nylon comb, both the comb and your hair become charged. The comb and your hair acquire opposite charges. Because the individual hairs acquire the same charge, they repel each other. This is static electricity.
The comb attracts the stream of water in the same way. The charge on the comb attracts the molecules of water in the stream. Because the molecules in the stream can be moved easily, the stream bends toward the comb.
Next Steps: Next time we do the experiment we will use other variables and check what happens.
Variables we will use are as follows:
• How the distance between the stream and the comb affect how much the stream bends.
• Run the comb through our hair several more times and see if the comb bends the stream of water more.
• Change the size of the stream by adjusting the tap.
• Use other combs and try these to see if some bend the stream more than others.
We enjoyed doing this Science Investigation.
Question:How do you possibly bend water? Can you do it?
Hypothesis: We don’t think we can bend water.
Experiment - Equipment
If you are going to bend water you will need...
• A nylon comb
• A stream of water out of the tap
• Dry hair
Procedure:
1. Turn on the water so it is falling from the tap in a narrow stream (just a few millimetres across but not droplets.)
2. Run the comb through your hair just as you normally would when brushing it. (do this several times)
3. Move the comb closer to the stream of water from the tap
4. Slowly bring the teeth of the comb near the stream of water, about 3 or 4 inches below the faucet.
5. When the teeth of the comb are about an inch or less away from the stream, the stream will bend towards the comb.
Observation: After running the nylon comb through our hair, the hairs on our head stood on end.
When the teeth of the comb were placed about an inch or less away from the stream of water, the stream of water bent towards the comb.
Conclusion: When you comb your hair with a nylon comb, both the comb and your hair become charged. The comb and your hair acquire opposite charges. Because the individual hairs acquire the same charge, they repel each other. This is static electricity.
The comb attracts the stream of water in the same way. The charge on the comb attracts the molecules of water in the stream. Because the molecules in the stream can be moved easily, the stream bends toward the comb.
Next Steps: Next time we do the experiment we will use other variables and check what happens.
Variables we will use are as follows:
• How the distance between the stream and the comb affect how much the stream bends.
• Run the comb through our hair several more times and see if the comb bends the stream of water more.
• Change the size of the stream by adjusting the tap.
• Use other combs and try these to see if some bend the stream more than others.
We enjoyed doing this Science Investigation.
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