°úÇÐ ½ÇÇèÀ» ÁÁ¾ÆÇÏ´Ùº¸´Ï... Áý¿¡¼ ºÎ´ã¾øÀÌ °£´ÜÇÏ°Ô ÇÒ ¼ö ÀÖ´Â ½ÇÇèÀ¸·Î ¹°¿¡ ¶ß´Â °Í°ú ¶ßÁö ¾Ê´Â °ÍÀ» ¾Ë¾ÆºÃ¾î¿ë~~ ÈñÇØ°¡ Á÷Á¢ ¸»ÇÏ°í ÁøÇàÇϴµ¥ ÁßÁ¡À» µ×´ä´Ï´Ù..
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You will need
water pencil raw egg ruler apple nail paper boat hair pin rubber ball
´ë° Áý¿¡ ÀÖ´Â ¹°°ÇµéÀ» È°¿ëÇÏ½Ã¸é µÇ³×¿ä^^ ÈñÇØ°¡ Á¾À̹踦 ¸¸µé¾î º¸°Ô ÇÏ¸é¼ ÁøÇàÇÒ ½ÇÇè¿¡ ´ëÇÑ ±â´ë°¨µµ Á» ÁÖ°í... Èñ°ÇÀÌ ¿À´ÃÀº ¶Ç ¹º°¡?....Âû½Ï ´Þ¶óºÙ¾î Ž»öÀüÀ̳׿ä..¤»¤»
Make some predictons. ( ¹Ì¸® ¿¹»óÇغ¸±â)
Which things will float? Which things will sink?
Will the pencil float? Will the nail float? Will the apple sink?...
´ë»ó¹°¸¸ ¹Ù²Ù¾î¼ ¹Ýº¹ Áú¹®°ú ´äÀ» ÇÏ¸é ¼ÕÀ» ¿À¸£¶ô ³»¸®¶ô Çϸé, ÀÚ¿¬½º·´°Ô ¹®ÀåÀÇ ÀÇ¹Ì¿Í ³»¿ëÀ» ¾Ë°Ô µÈ´ä´Ï´Ù^^...ÈñÇØ º¸À̽ÃÁÕ??
Draw a chart for recording the results.
¹Ì¸® °á°ú Â÷Æ®¸¦ ±×·Á¼ ´Ü¾îµµ ÀÍÈ÷¸é¼ Áغñ¸¦ Çß´ä´Ï´Ù. ½º½º·Î ½á º¸¸é¼ Çϸé È®½ÇÈ÷, ±â¾ïÀÌ ¿À·¡°£´ä´Ï´Ù~.
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1. Fill a bucktet with water. Åë¿¡ ¹° ä¿ö¼ 2. Slowly lower the pencil into the water. õõÈ÷ ¿¬ÇÊ ¹°¿¡ ³Ö°í 3. Remove the pencil from the water and test next item. ¿¬ÇÊ»©°í 4. Follow the same process for each item. ´Ù¸¥ °Íµéµµ °°Àº ¹æ½ÄÀ¸·Î
¿ä·¸°Ô ÇÏ¸é¼ Áú¹®µµ ÇØÁÖÁö¿ä... Is the pencil floating? Yes....It's floating. Is the raw egg floating? No...It's sinking. Is thie naill floating? Yes....It's floating... Is the apple floating? Yes.....It's floating... Is the nail floating? No.... It's sinking. I ±Ùµ¥ ¿¹»ó°ú ´Þ¸® »ç°ú´Â °¡¶ó¾ÉÀ» °Å¶ó »ý°¢Çߴµ¥ ¶°¼..¹«Ã´À̳ª ½Å±âÇØÇß´ä´Ï´Ù.. Èñ°ÇÀÌ µ¹¸°´Ù°í Á¤½Å¾øÁÕ~~¤»¤» ÀÚ´Â ¶ã °Å¶ó »ý°¢Çߴµ¥ ...Çöó½ºÆ½Àε¥µµ °¡¶ó¾É´õ±º¿ä... ±×·¡¼ Àúµµ ½Å±âÇؼ ´õ Àç¹Õ°Ô ÁöÄѺ¸¸ç ½ÇÇèÀ» ÁøÇàÇÏ°Ô µÇ´õ±º¿ä^^
Is the rubber ball sinking? No....it's floating. Is the coin sinking? Yes....It's sinking....
°ø±¼¸®´À¶ó µÑÀÌ ½Å³µ½À´Ï´Ù...Çϳª¾¿ Çϳª¾¿...Èñ°ÇÀÌ ¹°Àå³ÀÌ ³Ñ ÁÁÀº°¡ºÁ¿ë
ÀÌ¿Õ Á¤¸®ÇÒ °Å ¸ðµÎ ³Ö¾î È®Àεµ ÇÏ°í, ³î±âµµ ÇÏ°í...Ç×»ó ¸¶Áö¸·Àº «»Í!!...¤»¤» È®¿¬È÷ ¶ß´Â °Í°ú °¡¶ó¾É´Â °ÍÀÌ º¸ÀÌÁÕ~~..^^
Ç¥·Î Á¤¸®Çغ¸°í,,,,¿¹»ó°ú ´Þ¸® ¹°¿¡ ¶ß´ø »ç°ú, °¡¶ó¾É´ø ÀÚ´Â ´õ¿í ±â¾ï¿¡ ³²³×¿ä...^^Èñ°ÇÀ̶û ½ÇÇèÀç·áÀÎ »ç°ú¸¦ °£½ÄÀ¸·Î ...¾ö¸¶´Â È기 ¹° Ä¡¿ì´À¶ó ¹Ù»Ûµ¥.. ¾Æ±×µéÀº ³î°í, ¸Ô°í ³Ñ³Ñ ÁÁÀ¸³×¿ä...ÄÊ!
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¿ø¸® ¿Ö ±×·³ ¾î¶² °Ç ¶ß°í, ¾î¶² °Ç °¡¶ó¾É´Â Áö ¿ø¸®¸¦ ¾Ë¾ÆºÁ¾ßÁö¿ä...
Why do some things float but not others?
The density of the pencil is less than the density of the water. The density of the nail is greater than the density of the water.
¹Ðµµ¸¦ ¾Ë°Ô ÇÏ·Á°í ºñ½ÁÇÑ Å©±âÀÇ Ä«¸Þ¶óÁý°ú ¼è·ÎµÈ ±âÂ÷¸¦ µé¾îº¸±¸¿ä...°¨À» ÀâÁö¿ë~
°¢ ¿¬ÇÊ,°í¹«°ø, Á¾ÀÌ¹è µîÀÇ ¹°º¸´Ù ¹Ðµµ°¡ À۾Ƽ...(°¡º¿ö¼) ¹°¿¡ ¶ß°Ô µÇÁö¿ä..
´ë»óÀ» ¹Ù²Ù¾î ³¯´Þ°¿, ¸ø, ÀÚ µîÀº ¹°º¸´Ù ¹Ðµµ°¡ Ä¿¼ °¡¶ó¾É´Â´Ù°í ½áº¸±âµµ Çϱ¸¿ä..
ÀÌ·¸°Ô ´ë»óÀÇ ¹Ðµµ¿¡ µû¶ó ¶ß´Â °ÍÀº °áÁ¤µÈ´Ù°í Á¤¸®Çß´ä´Ï´Ù.. Things float depending on their density. (¹Ðµµ)
¸¶¹«¸® ¾×ƼºñƼ! ¿ä·¸°Ô ¹°¿¡ ¶ß´Â °Í°ú ¾È ¶ß´Â °ÍÀ» ±×·Áº¸¸é¼ ¸¶¹«¸® Ç߳׿ä^^
¾î·Á¿ï °Í °°Áö¸¸, ¾ÆÀ̵éÀº '½ºÆùÁö'¶ó density(¹Ðµµ)..¿µ¾îµµ óÀ½¹è¿ì´Â ÇÑ±Û ´Ü¾îó·³ ¹Þ¾ÆµéÀ̳׿ä... (±ÛÄÉ ¹Ï°í ¾ö¸¶Ç¥ ÇÑ´ä´Ï´Ù...) |
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¹°¿¡ ¶ß´Â °Í¿¡ ´ëÇÑ ½ÇÇèÀ» ÇÏ°í ³ ÈÄ ÈñÇØ´Â ´Þ°¿À» ¹°¿¡ ¶ß°Ô ÇÏ´Â ½ÇÇèÀ» ¾îµð¼ ºÃ´ÂÁö ÀÚ²Ù Çغ¸ÀÚ°í Çؼ
À̰͵µ ¹°ÀÇ ¹Ðµµ¿Í °ü·ÃÀÌ ÀÖ¾î¼ ¿¬°üÁö¾î, ´ÙÀ½³¯ ¿äÁò Ãß¼¼¿¡ ¶Ç Çѹø ¸ÂÃç.. ¸ôÀÔ¿µ¾î..¤»¤»...µû¶óÀâ±â ¶Ç ÇÕ´Ï´Ù.....Çä...Çä!!
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You will need
2 clear glasses 2 eggs water table salt (Àú´Â ±½Àº ¼Ò±ÝÀ¸·Î..¤»¤») a table spoon
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1. Fill one glass halfway with water. ÄÅ¿¡ ¹° ¹Ý ä¿ì°í 2. Fill the other glass halfway water, add 10 tablespoons of salt. ´Ù¸¥ ÄÅ¿¡µµ ¹° ¹Ý ä¿ì°í, ¼Ò±Ý 10½ºÇ¬ ³Ö¾îÁà 3. and Stir it really well, until the salt has dissolved in the water. ¼Ò±ÝÀÌ ´Ù ³ìÀ» ¶§±îÁö Àß ¼¯¾î 4. Carefully place the egg in each glass. °¢°¢¿¡ Á¶½ÉÇؼ ³ÖÀÚ.
Á¶½É½º·¹ ¼Ò±Ý³ÖÀ¸¸é¼ ÁÁ¾ÆÇÏ°í, ¼Ò±ÝÀÌ ¾Èº¸ÀÏ ¶§±îÁö ¿½ÉÈ÷ ¼¯°í ÀÖ´Â ÈñÇØ!...¤»¤»...³ª¸§ ¿Á߸ðµå³×¿ë~
¹° ¼ÓÀ» ÀÚ¼¼È÷ º¸¸ç °üÂû!!...µÕµÕ ¶á ´Þ°¿ Àß º¸À̽ÃÁÕ??...ÇìÇì.. ¸ÀÀ» º¸°í´Â À¸~~~~....Â¥´Ù~~...Á¤³ç ±×°É ¸ô¶ú³Ä...ǪÇÏÇÏ..ÈñÇؾç?? ¿ä¾Õ¿¡ ÇÑ ' Çô½ÇÇè'¿¡¼ ³»¿ëÀ» »ó±â½ÃÅ°¸ç http://www.suksuk.co.kr/momboard/read.php?table=CDX_001&number=11228&page=1
Which part of your tongue can you taste salty food? Çô¾îµð·Î §¸ÀÀ» ºÁ? I taste salty food on the sides of my tongue. ÇÏ¸é¼ Çô·Î ¤¾îÁÖ±¸¿ë~^^
Which egg float? The egg in the salt water floats. Do you know why?....¿ª½¬³ª....´ë´ä¾ø³×¿ë~~¤»¤»
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The salt water is heavier than the plain water. ¼Ò±Ý¹°ÀÌ ±×³É ¹°º¸´Ù ´õ ¹«°Å¿ö.
The density of plain water is less than the density of the egg. So the egg sinks. ±×³É¹°Àº ´Þ°¿º¸´Ù ¹Ðµµ°¡ ÀÛ¾Æ. ±×·¡¼ ´Þ°¿ÀÌ °¡¶ó¾É°í The densityt of salt water is greater than the density of the egg. So the egg floats. ¼Ò±Ý¹°Àº ´Þ°¿º¸´Ù ¹Ðµµ°¡ Ä¿. ±×·¡¼ ´Þ°¿ÀÌ ¶°.
. ¾îÁ¦ '¹Ðµµ'(density) ¿¡ ´ëÇؼ´Â µéÀºÁö¶ó...½±°Ô ÁøÇàÀÌ µÆ³×¿ä... ±× ¿¬Àå¼±¿¡¼..
¾Æ¹«°Íµµ µéÁö ¾ÊÀº ¹°ÀÇ ¹Ðµµ°¡ ´Þ°¿ÀÇ ¹Ðµµº¸´Ù À۾Ƽ.. ¹°ÀÌ À§ÂÊ, ´Þ°¿ÀÌ ¹°¿¡ °¡¶ó¾É°í, ¼Ò±Ý¹°Àº µÎ °³ÀÇ ¹°Áú(¼Ò±Ý, ¹°) ÀÌ ÇÕÃÄÁ® ¹Ðµµ°¡ ³ô¾ÆÁ®¼... ¹ØÀ¸·Î ³»·Á°¡´Ï ´Þ°¿ÀÌ ¶á´Ù°í ±×¸²À¸·Î ±×·ÁÁÖ´Ï ÀÌÇØ°¡ ºü¸¥°¡ º¸³×¿ä..
ÀÌ·¸°Ô ÀÌƲ°£ÀÇ ½ÇÇèÀ¸·Î ¹°À» ÅëÇØ ¾î·Á¿ï ¼ö ÀÖ´Â °úÇпø¸®¸¦ Àç¹Õ°Ô ³îÀÌó·³ ÇÏ¸é¼ Çغõ¥¿ä.. Àúµµ »õ»ï½º·¹ '¹°ÀÇ ¹Ðµµ(º¯È)' ¶§¹®¿¡ »ç¹°ÀÌ ¹°¿¡ ¶ß³×.....ÇÏ°í ¸íÈ®È÷ ¾Ë ¼ö ÀÖ¾ú°í, ÈñÇØ¿¡°Ôµµ ¾ÆÁÖ ±â¾ï¿¡ ³²´Â density activity °¡ µÆ´ä´Ï´Ù... Àý´ë ÀÌ ´Ü¾î 'density' ¸¦ ÀØÁö ¸øÇÒ °Í °°³×¿ë~~.
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