Use the figures on this page and an atlas. 1. a) Which line of latitude is the biggest circle? b) Every line of latitude has a number. The equator is \( 0^{\circ} \). What is the highest latitude on the globe?

Sure, let's address each part of your question: ### 1. a) **Which line of latitude is the biggest circle?** The **Equator** is the largest circle of latitude on Earth. It divides the planet into the Northern and Southern Hemispheres and has the greatest circumference of any circle of latitude, measuring approximately **40,075 kilometers (24,901 miles)**. This makes it the biggest circle compared to all other lines of latitude, which are smaller as they move towards the poles. ### 1. b) **What is the highest latitude on the globe?** Latitude measures how far north or south a location is from the Equator, which is at **0° latitude**. The highest possible latitudes are: - **90° North (90° N)**: This is the **North Pole**, the northernmost point on Earth. - **90° South (90° S)**: This is the **South Pole**, the southernmost point on Earth. These points represent the maximum extents of latitude on the globe. No location on Earth has a latitude greater than **90°** north or south. ### **Summary:** - **a)** The **Equator** is the largest (biggest) circle of latitude. - **b)** The highest latitudes are **90° North** (North Pole) and **90° South** (South Pole). If you have access to an atlas, you can visualize these lines of latitude and their positions on the globe to better understand their significance.