資源簡介

1.蠟燭的變化
1.活動：做一支蠟燭
所需材料：
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
蠟塊、酒精燈、火柴、三腳架、石棉網、燒皿、試管夾、蠟燭模子、棉芯等。
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
制作方法：
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
①將蠟塊切成碎屑。
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
②加熱蠟屑成蠟油。
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
③在模子里放入一根棉芯,將蠟油
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)倒入模子里。
④等蠟油凝固,蠟燭就制成了。
活動注意點：在使用酒精燈時，要注意正確的方法，在制作蠟燭過程中，不要用手去觸摸燒熱的東西，以防止燙傷。
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
活動結論：
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
蠟燭的形狀發生了變化。在制作蠟燭的過程中，蠟塊經歷了由固體到液體再到固體的形態變化。但蠟燭這種物質本身沒有發生變化，仍然是蠟燭。
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
2.鐵釘生銹
1.鐵釘上的銹呈紅褐色,非常松軟。生銹的鐵釘表面有一層粉末狀的紅褐色，用手一摸，這些紅褐色的鐵銹就會粘到手上。鐵銹的主要成分是鐵的氧化物和氫氧化物。
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
2.日常生活中生銹的鐵制品：
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
斧頭生銹、鐵欄桿生銹、自行車的輪轂生銹、鐵鎖
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)生銹、鐵鍋生銹、鐵鍬生銹、破舊機器、報廢的汽車、河道中的鐵管、沉沒的船只等。
3.鐵銹與鐵的不同
分別敲擊鐵銹塊和鐵釘，發現鐵銹塊比較脆，容易斷裂。用力敲擊鐵釘，鐵釘除了微微變形之外，沒有其他變化。
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
用砂紙摩擦鐵銹塊和鐵釘，發現用砂紙摩擦鐵銹塊會有紅褐色的粉末出現，摩擦后的鐵銹塊就會恢復原來的金屬光澤。用砂紙摩擦鐵釘，鐵釘沒有什么變化。
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
4.鐵銹和鐵不是同一種物質：
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
首先他們的成分不同，鐵銹的主要成分是鐵的氧化物和氫氧化物，
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)鐵的成分就是鐵。
其次鐵是灰色固體，鐵銹是紅褐色固體。
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
鐵銹和鐵除了在顏色、光澤、軟硬方面的不同外,在延展性、導電性、導熱性等等方面也不不同。
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
5.鐵與潮濕的空氣接觸就會生銹，鐵經過化學變化就會生成鐵銹。
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
1.3《制作汽水》
1.在炎熱的夏天,喝上一瓶汽水,會使人感到清涼。因為氣體從口中和鼻中排出時,會帶走身體里的一部分熱量。
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
2.實驗一：試一試哪兩種物質混合在一起能產生氣泡
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
實驗材料：紙杯、吸管、白醋、小蘇打、錐形瓶、燒杯、冷開水等。
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
實驗方法：在4種物質中任選兩種物質混合在一起，看一看，這4種物質中哪兩種物質混合在一起能夠產生氣泡？
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
實驗現象：將小蘇打與白醋混合就能產生氣泡。其他的物質混合不能產生氣泡。
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
實驗結論：將小蘇打與白醋混合就能產生氣泡。
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
1.4化學家的研究
1.在眾多的科學家中,有一類是化學家,他們常常在實驗室里做各種各樣的實驗,研究物質的性質、成分,并制造新物質。
2.化學家經常研究的是什么問題？
這是什么東西？
他有什么性質？
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
與另一種物質混合起來會怎么樣呢？
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
它可以變成另外一種物質嗎？
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)
3.化學家是指在原子、分子水平上研究物質的組成、結構、性質、變化及其應用的科學家。現在大多數的新藥物都是通過化學技術研制而成的。
(?https:?/??/?mp.weixin.?/?s?__biz=MzI4NjA0NDk1Nw==&mid=2247491002&idx=8&sn=4490b7dd49766055100c4e338ba19161&chksm=ebe3bbc8dc9432de620f3b4604946db4dad1a90e9db58dcc30dfa779cbd4913fcfec69fc47bc&token=1803594316&lang=zh_CN&scene=21"
\l
"wechat_redirect"
\t
"https:?/??/?mp.weixin.?/?_blank?)

展開更多......

收起↑