选修7 Unit 3 Under the sea-【优化探究】2024高考英语一轮复习高考总复习配套课件（人教版 老教材 老高考）

一轮· 英语 * 必备知识 自主梳理 核心考点 互动探究 跟踪检测 巩固提升 课时作业 即时演练 一轮· 英语 * 必备知识 自主梳理 核心考点 互动探究 跟踪检测 巩固提升 课时作业 即时演练 精读真题提素养/主题下的高考拓展运用 (2019·北京卷) By the end of the century，if not sooner，the world's oceans will be bluer and greener thanks to a warming climate，according to a new study. 一轮· 英语 * 必备知识 自主梳理 核心考点 互动探究 跟踪检测 巩固提升 课时作业 即时演练 At the heart of the phenomenon lie tiny marine microorganisms (海洋微生物) called phytoplankton.Because of the way light reflects off the organisms，these phytoplankton create colourful patterns at the ocean surface.Ocean colour varies from green to blue，depending on the type and concentration of phytoplankton.Climate change will fuel the growth of phytoplankton in some areas，while reducing it in other spots，leading to changes in the ocean's appearance. 一轮· 英语 * 必备知识 自主梳理 核心考点 互动探究 跟踪检测 巩固提升 课时作业 即时演练 Phytoplankton live at the ocean surface，where they pull carbon dioxide (二氧化碳) into the ocean while giving off oxygen.When these organisms die，they bury carbon in the deep ocean，an important process that helps to regulate the global climate.But phytoplankton are vulnerable to the ocean's warming trend.Warming changes key characteristics of the ocean and can affect phytoplankton growth，since they need not only sunlight and carbon dioxide to grow，but also nutrients. 一轮· 英语 * 必备知识 自主梳理 核心考点 互动探究 跟踪检测 巩固提升 课时作业 即时演练 Stephanie Dutkiewicz，a scientist in MIT's Center for Global Change Science，built a climate model that projects changes to the oceans throughout the century.In a world that warms up by 3℃，it found that multiple changes to the colour of the oceans would occur.The model projects that currently blue areas with little phytoplankton could become even bluer.But in some waters，such as those of the Arctic，a warming will make conditions riper for phytoplankton，and these areas will turn greener.“Not only are the quantities of phytoplankton in the ocean changing，” she said，“but the type of phytoplankton is cha