Who Wants to be a Millionaire ?                $ 100 $ 200 $ 300 $ 500 $ 2,000 $ 1,000 $ 4,000 $ 8,000 $ 16,000 $ 32,000 $ 64,000 $ 125,000 $ 250,000 $ 500,000 $1,000,

To start fires Ancient people discovered magnetic rocks called lodestone. What did they use them for? A B C D Compasses sculptures 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 B C D Wind – up clock television Electric can opener 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 B C D Ancient scientists did not know a lot about magnets Magic is also a part of science if you understand it properly We learn about science by reading what others did, then doing more 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 B C D A compass pointing the correct direction A crane lifting then dropping a metal car A cupboard door staying closed A magnetic bracelet being used for healing

A crane lifting then dropping a metal car

What characteristics do magnetic substances have? They A B C D can push or pull objects they are not touching are always black and cold to touch fall faster than other objects when you drop them 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 B C D An electromagnet A permanent magnet A natural magnet A magnetized paper clip

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 B C D Try using the electromagnet with 20, 30, then 40 twists Try using one battery, then adding another battery Look at someone else’s electromagnet to see what was used 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 B C D silver lead water iron

Which correctly shows an example of how magnets can help at home? A B C D Separating aluminum cans from glass Lifting, then dropping metal washers. A crane lifting a car to be crushed Closing a refrigerator door

What happens when two north poles of magnets are placed together? A B C D They repel each other They attract each other They cancel each other out 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 B C D Static and Current Electricity Magnets and Magnetism 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 B C D Search the internet about the history of magnetite Try to build a compass using a piece of magnetite Ask his science teacher if there is a rock that’s magnetic 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 B C D Earth itself is a giant magnet The compass’s needle is weak Magnets will mess up a compass 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 B C D The north and south poles The middle of the magnet Only the North poles Only the South poles

The North and South poles

How is Earth’s magnetic field similar to that of a magnet? A B C D It has a North and South pole It is hundreds of miles long It is made in Earth’s coreIt is shaped like a horseshoe

It has a North and South pole