ACT科學測試題實例分析

　　本日為考生帶來了ACT科學測試題，願望考生能拿來賣力演習，背面另有具體的例題剖析，考生在做完標題以後可以賣力的瀏覽下，看是不是與本身的答題思緒同等!

　　Passage 1

　　The following table represents the concentration of ions and dissolved gases in the sediment at the bottom of an ocean. A depth of 0 centimeters (cm) represents the top of the sediment. The concentrations are expressed in parts per million (ppm). The acidity of a solution is represented on a scale known as pH. A pH of 1 is very acidic, a pH of 7 is neutral, and a pH of 14 is very basic.

　　Table adapted from R.M. Atlas and R. Bartha, Microbial Ecology: Fundamentals and Applications. ©1981 by Addison-Wesley Publishing Company.

　　A certain type of bottom-dwelling microorganism thrives under the following environmental conditions: low concentrations of Fe2+, high concentrations of O2, and a neutral pH. Based on the table, at which of the following sediment depths would one most likely find this microorganism?

　　F. 0 cm

　　G. 5 cm

　　H. 10 cm

　　J. 15 cm

　　讀題後第一個步調便是找到標題問到的誰人圖表。這道題沒有給出明白圖表號，幸虧，這篇文章裏也就只有一個表格罷了。是以，咱們就看這張表。

　　如今咱們要找到這張內外哪部門是和答題相幹的。咱們要找的未知量是這些微生物的地點深度，已知量是“low concentrations of Fe2+, high concentrations of O2, and a neutral pH”。是以，咱們應當將咱們的視野轉移到Fe2+ 及O2 的“Concentration in sediment”上和pH值上，別的“concentrations”和“temperature”就不消看了。

　　這道題要“a low concentration of Fe2+(亞鐵離子的一個低濃度)”，以是咱們應當在表中圈出其最低的濃度，然後圈出O2 的最高濃度。末了，咱們圈出最靠近中性的pH值。咱們大概不曉得中性pH值是若幹，那末咱們就應當回到文章看，咱們發明pH7是中性值。

　　依據標註，咱們可以看到對應的深度值為0cm。然後咱們再去看謎底選項，末了找到選項F和咱們預先獲得的謎底同樣，終極謎底就是它了。