nicolaus copernicus and his heliocentric model哥白尼和他的日心說(shuō)changing views of the planets行星觀念的改變the rings of saturn土星環(huán)minerals and the three categories of rock礦物質(zhì)和三種石頭rock collecting石頭收集the ecosystem of a pond池塘生態(tài)系統(tǒng)an ecosystem in a barrel桶里的生態(tài)系統(tǒng)the importance of photosynthes is光合作用的重要性experiment：finding starch in plant leaves實(shí)驗(yàn)：發(fā)現(xiàn)植物葉子里的淀粉stormy weather暴風(fēng)雨天氣what is the eye of a hurricane？什么是颶風(fēng)眼？simple and compound machines簡(jiǎn)單而又復(fù)合的機(jī)器human-powered flying machines人力飛行器human diseases人類(lèi)疾病allergens過(guò)敏原the beliefs of aristotle亞里士多德的信仰blood and the circulatory system血液和循環(huán)系統(tǒng)sickle—cell anemia鐮刀型細(xì)胞貧血癥kinetic and potential energy動(dòng)能和勢(shì)能sports and potential energy運(yùn)動(dòng)和勢(shì)能antibiotics抗生素super—resistant bacteria有超強(qiáng)抵抗力的細(xì)菌how substances move through plants礦物質(zhì)如何轉(zhuǎn)移到植物中plant pigments植物的色素aquatic biomes水中生態(tài)群落an important conservationist一個(gè)重要的生態(tài)環(huán)境保護(hù)者robots and humans：an uneasy partnership機(jī)器人和人類(lèi)：一個(gè)不穩(wěn)定的關(guān)系using robots in surgery機(jī)器人在外科手術(shù)中的應(yīng)用kinds of dinosaurs恐龍的種類(lèi)reconstructing dinosaurs’movements重建恐龍的活動(dòng)chemistry in everyday life日常生活中的化學(xué)organic farming有機(jī)耕作mayan astronomy瑪雅天文學(xué)calendars across the ages各個(gè)時(shí)代的日歷the early development of meteorology氣象學(xué)的早期發(fā)展weather proverbs天氣諺語(yǔ)the biochemist生物化學(xué)學(xué)家the growing role of genetics in biochemistry生物化學(xué)中遺傳學(xué)越來(lái)越重要的地位the science of bike riding騎自行車(chē)的科學(xué)wheels and roads車(chē)輪和路smell and taste嗅覺(jué)與味覺(jué)balance and dizziness平衡與眩暈the future of wireless communication無(wú)線通信的未來(lái)the mayapple美洲鬼臼