Water is essential for all living things. A person can live weeks without food, but can only survive about three days without water. How much water is there in the world? How much water is in our food? Let's take a closer look at this precious liquid that infuses our world.
In this lesson you鸿运福彩app下载安装 will:
- Compare how quantities are represented on different charts and graphs
- Interpret data on a map
- Calculate percentages
- Learn what volume is and how to measure it