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Who Wants to be a Millionaire ? 15 14 13 $1,000,000 $ 500,000 $ 250,000 12 11 10 $ $ 125,000 64,000 9 8 $ $ 32,000 16,000 7 6 5 4 3 $ $ $ $ 8,000 4,000 2,000 1,000 $ 500 $ 300 2 $ 200 1 $ 100 Ancient people discovered magnetic rocks called lodestone. What did they use them for? A C To start fires sculptures B D Compasses telephone receivers Compasses Sam was shown four objects, one of which did not contain a magnet. Which should he select as the one that does NOT contain a magnet? A C Wind – up clock Electric can opener B television D Cassette recorder Wind – up clock Ancient Greeks thought that magnetite was a rock with magical properties; 73 hundreds of years later, sailors used magnetite to find directions. Today scientists have learned to make magnets. Which sentence best explains how we learn science? A Ancient scientists did not know a lot about magnets C We learn about science by reading what others did, then doing more Magic is also a part of science if you understand it properly B D We learn much more about science by just doing our own experiments We learn about science by reading what others did, then doing more Which correctly shows an electromagnet being used in today’s society? A C A compass pointing the correct direction A cupboard door staying closed B A crane lifting then dropping a metal car D A magnetic bracelet being used for healing A crane lifting then dropping a metal car What characteristics do magnetic substances have? They A can push or pull objects they are not touching B are always black and cold to touch C fall faster than other objects when you drop them D can give a “shock” when you touch them can push or pull objects they are not touching A circuit, coiled wire around an iron rod, and a switch are components of which of the following? A An electromagnet B C A natural magnet D A magnetized paper clip A permanent magnet An electromagnet Keisha was making an electromagnet in class and wondered if it mattered how many times the wire was twisted around the nail. What would be the BEST way for her to find out? A C Try using the electromagnet with 20, 30, then 40 twists Look at someone else’s electromagnet to see what was used B Try using one battery, then adding another battery D Ask the teacher to find the correct answer Try using the electromagnet with 20, 30, then 40 twists What substance is attracted to a magnet? A silver B lead C water D iron iron Which correctly shows an example of how magnets can help at home? A C Separating aluminum cans from glass A crane lifting a car to be crushed B Lifting, then dropping metal washers. D Closing a refrigerator door Closing a refrigerator door What happens when two north poles of magnets are placed together? A They repel each other C They cancel each other out B They attract each other D The strength of the magnet is doubled They repel each other A student wanted to make a compass. Which would be the best book to find this information? A Static and Current Electricity B Magnets and Magnetism C D All About the Earth Maps of North America Magnets and Magnetism After reading about ancient explorers using a rock called magnetite to build a type of compass, Cosby wondered whether this was really possible. What would be the best way for Cosby to find out if a rock could be used in a compass? A Search the internet about the history of magnetite B Try to build a compass using a piece of magnetite C Ask his science teacher if there is a rock that’s magnetic D Decide the book was really mixing up myth for truth Try to build a compass using a piece of magnetite During a science activity, Lee noticed when you place a strong magnet near a compass, the compass’s needle lined itself with the magnet, opposite poles together. He also noticed that when he moved the magnet around the compass, the needle followed the magnet. How could Lee’s observation with a magnet and a compass relate to Earth’s magnetic field? A C Earth itself is a giant magnet Magnets will mess up a compass B The compass’s needle is weak D Earth’s gravity affects magnetism Earth itself is a giant magnet A student compared a bar magnet to a horseshoe magnet by sprinkling bits of iron around them. From his experiment, predict which part of the magnet is the strongest. A The north and south poles B The middle of the magnet C Only the North poles D Only the South poles The North and South poles How is Earth’s magnetic field similar to that of a magnet? A C It has a North and South pole It is made in Earth’s core B It is hundreds of miles long D It is shaped like a horseshoe It has a North and South pole