... and typhoons describe the same type of cyclonic storm. However, the HOW TO MASTER THE IELTS140word cyclone tends to be used with storms that form below the equator of the earth, whereas hurricanes ... packing stones carefully into the gap because they help to keep the other stones in place.[Q180] The large, long stones, like this one here, should be placed across the full width of the wall, ... in between. The gap in the centre is filled with the smallest stones. These have a rounded shape and are known as ‘hearting’ or packing stones. Don’t just throw them into the wall. Place these...