B The podcast host is having a conversation with an expert on icebergs. Read their conversation and complete the table.
Host: Today, we’re talking about icebergs on our podcast. Joining me now is Dr Henry Tao. Dr Tao, your job is to study icebergs. What can you tell us about them?
Dr Tao: Icebergs are big pieces of ice—and I mean big. Some can be as big as a building, and the biggest ones can be even bigger than a city. They can have all kinds of shapes.
Host: And they float in the ocean?
Dr Tao: That’s right. Although they move on the surface of the ocean, they’re actually made of fresh water.
Host: Interesting. So how do they form?
Dr Tao: Large chunks of ice break off from glaciers or ice shelves.
Host: I see. Are they important for our oceans?
Dr Tao: Oh yes. Very important. They’re useful to many ocean animals, like polar bears, seals and seabirds. Seals and seabirds often rest on icebergs, and polar bears like to hunt from them.
Host: Do icebergs play any other role in the environment?
Dr Tao: Yes. Icebergs often have important chemicals in them. As the icebergs melt, these chemicals go into the seawater. This helps keep the environment healthy.
Host: Wow! Who knew icebergs were so important?
Dr Tao: Important … and beautiful! In my opinion, icebergs are among the most beautiful sights in the natural world.
Host: Thanks for sharing your thoughts today, Dr Tao.
All about icebergs
What are icebergs? Big (1) with different shapes.
What are their sizes? • Some can be as big as (2).
• Some can be bigger than a city.
What are they made of? (3).
How do they form? Large chunks of ice (4) from glaciers or ice shelves.
Why are they important? • They provide resting places for seals and seabirds.
• They are used by polar bears for (5).
• They help keep the (6) healthy.