compass [comprehension quiz] [tooltips over pictures]

Deep inside our planet is a super-hot, liquid core made mostly of iron. As the Earth spins, this liquid metal moves around, which creates a powerful magnetic field that surrounds the entire planet. That same magnetic field also protects us. Just like a bar magnet you might play with, the Earth's magnetic field has a North Pole and a South Pole. The needle in a compass is also a magnet, usually made of iron, and one end is attracted to the Earth's magnetic North Pole. The other end of the needle points south. The end that points north is often colored red to make it easy to see. The needle is balanced on a tiny, smooth pivot or floating in liquid, which allows it to spin freely and find its direction The most important thing to remember is that the compass needle always points north. Once you know which way is north, you can find the other directions (south, east, and west) based on the "compass rose" printed on the compass. Just be careful to keep your compass away from other magnets. Things like smartphones can mess up the compass and cause the needle to point the wrong way.

1.What is the Earth's core mostly made of ? hard rock molten iron larva 2.How is the Earth's rotation protecting us ? the rotation keep the Earth's core as a liquid the rotation creates Earth's tilt the rotation creates a magnetic field 3.Which of these statements is incorrect ? geographical north is magnetic north geographical south is magnetic north geographical north is magnetic south 4.Why is it important to know which direction is north ? it is the direction you are travelling in maps are only printed that way it allows you to work out all of the other compass points 5.If you have your phone and compass in the same hand why might this cause a problem ? you might drop one your phone might not get a good signal your compass might be affected

There are 9 pictures in a grid. As you hover over each picture a blue screen appears on which there is some information about what is being shown in the picture. Read this information and look at each picture to make sure you understand what is being shown. If you want to check how much you understand try the quiz on the right hand side. To start the activity again just refresh the page.