Science - Magnetism Study Guide

Brain Pop #1 Q1) What does a magnetic field look like?

It's invisible

Brain Pop #1 Q2) How are the magnetic domains of a magnet different from the domains of an ordinary piece of metal?

In a magnet, the domains all point in the same direction; in an ordinary piece of metal, they're all jumbled up.

Brain Pop #1 Q3) What can you infer about magnetic domains from the fact that they are arrangements of atoms?

The individual domains are extremely small.

Brain Pop #1 Q4) Why are the magnetic domains of this paperclip lined up?

Because the paperclip has been exposed to a magnetic field.

Brain Pop #1 Q5) Which of the following metals can be magnetized?

Iron

Brain Pop #1 Q6) How can you create a magnetic field?

By running current through a wire

Brain Pop #1 Q7) Which of the following statements is true?

A compass is affected by the earth's magnetic field.

Brain Pop #1 Q8) Where might you find an electromagnet?

In an electric motor

Brain Pop #1 Q9) What can you conclude about electricity and magnetism from the information presented in the movie?

They are related phenomena.

Brain Pop #1 Q10) How would you adjust a compass to account for a magnetic variation of 10 degrees east?

Rotate 10 degrees west

Brain Pop #2 Q1)A compass needle points directly to your right. Which way is east?

Behind you

Brain Pop #2 Q2)In which situation would a compass be most useful?

Hiking in the woods

Brain Pop #2 Q3) The pivot in a compass allows the needle to?

Move freely

Brain Pop #2 Q4) Which factor has the greatest impact on the likelihood of two magnets attracting?

Orientation of the poles

Brain Pop #2 Q5) Which object can be magnetized?

Iron nail

Brain Pop #2 Q6) The north pole of Earth's magnetic field is closet to which continent?

Antarctica

Brain Pop #2 Q7)What statement about the compass is most accurate?

It's design has not changed much overtime.

Brain Pop #2 Q8)Which of the following would be true if Earth's magnetic field were reversed?

compass needles would point south.

Brain Pop #2 Q9)Magnetic variation _____ with increasing distance from the poles.

Decreases

Brain Pop #2 Q10)How would you adjust a compass to account for a magnetic variation of 10 degrees east?

Rotate 10 degrees west

The Unique Properties of Lodestone Q1) In what ways has the discovery of magnetite changed daily life?

Explains how lodestone is magnetic. Which has lead to multiple discoveries for uses of loadstone. Many thought that loadstones were magical powers and others thought it was some sort of spirit.

The Unique Properties of Lodestone Q2) What other scientific words or elements (besides magnet) can you think of that come from common names or locations?

Belt, deposition, family, insult, mole, lisp, and others.

Magnets Made from Different Materials Q1) Describe Alnico magnets:

Made of aluminum, nickel cobalt. Strong, tough, and heat-resistant. Can be found in metals, microphones, and loudspeakers.

Magnets Made from Different Materials Q2) Describe Ferrite Magnets:

Made out of blended iron and other materials. When blended with plastic becomes soft and bendable. When blended with clay can be formed into different shapes. Also they are used to attach papers and photos to your refrigerator. Additionally, they are in toys, small motors, and door labels.

Magnets Made from Different Materials Q3) Describe Rare-Earth Magnets:

Made of uncommon metals. Two examples are neodymium and samarium. Extremely powerful. Some examples are computed disks, satellite systems, and headphones.

Animals Use Magnetism Q1) What sorts of experiments might scientists perform to study how animals navigate?

Scientists perform experiments like mazes for the animals. Possibly, the scientists have the animals find their way through the maze using the sun and moon or some type of food with a distinct smell. They could put censors on the animals. This is more reasonable with smaller animals like mice and ants, however they could do this with almost any animals.

Animals Use Magnetism Q2) What devices do humans use to navigate

Compasses, maps, coordinates, etc. Compasses attract to North and South poles to telly you your exact direction or "bearing." Also maps and globes tell you where different places are around the world.

Bill Nye Q1) There are two types of magnets. Some of them are __________________ and some are

_____________________.

stronger;weaker

Bill Nye Q2) Magnetism comes from _________________ found in the Earth.

mineral

Bill Nye Q3) The most common mineral that can be turned into a magnet is ___________________.

iron

Bill Nye Q4)Magnetism comes from _________ also known as _________

moving electrons;electricity

Bill Nye Q5) You can make an electromagnet with __________________, __________________, and a

____________________.

nails;clockwise;battery

Bill Nye Q6) The Earth's magnetic field comes from melted ________________ and _______________ and extends

way out into space.

Iron;nickel

Bill Nye Q7) When a magnet comes into contact with another magnet, it either ____________________ or

____________________.

Attracts;repels

Bill Nye Q8) If you cut a magnet in half, you end up with ______________________________ that each have a

__________________ and a ____________________.

2 smaller magnets;north,south

Bill Nye Q9) Poles that are alike will _____________________ each other, while poles that are not alike will

_________________________.

repel;attract

Bill Nye Q10) You can find magnets in many devices including (list 3): _________________________ _________________________ _________________________

refrigerator doors;radios and compasses

Bill Nye Q11) Whenever electricity is flowing, a ________________________ forms.

magnet

Bill Nye Q12) Magnets are formed from iron, nickel, or cobalt when the ______________________ line up in the same

direction

domains

Bill Nye Q13) A compass works by pointing to _________________________.

magnetic north poles

Bill Nye Q14) The Earth's magnetic field is strongest at it's ________________ and is where you can see the

____________________________ or the _______________________.

poles;northern lights;southern lights

Bill Nye Q15) some animals like dolphins,birds and honey bee's use the ______________ to find their way back home.

magnetic field

What is a compass?

A compass is a tool for finding direction. A simple compass is a magnetic needle mounted on a pivot or short pin. The needle, which can spin freely, always points north. The pivot is attached to a compass card. The compass card is marked with the directions. To use a compass, a person lines up the needle with the marking for the north. Then the person can figure out all the other directions.

What is a magnet?

A magnet is a rock or a piece of metal that can pull certain types of metal toward itself. It attracts or repels things.

What is magnetism?

a physical phenomenon produced by the motion of electric charge, resulting in attractive and repulsive forces between objects.

What is magnetite?

a gray-black magnetic mineral which consists of an oxide of iron and is an important form of iron ore.

How is magnetism and gravity alike?

Both are non-contact invisible forces.

How How is magnetism and gravity different?

Magnetism moves things in all directions, while gravity pulls things to the center of the Earth.

How is magnetism and electricity alike?

Both involve two different things. Electricity is two different charges and magnetism is two different poles.

How is magnetism and electricity different?

Electricity is electronic currents while magnetism is magnetic fields.

In what direction do magnets move things?

All directions

How do you use a compass given a bearing?

Turn the dial so that the number/direction lines up with the white line under the DOG. Turn till "Red Fred' is in the shed.

How do you find your bearing using a compass?

Turn in the direction you chose then turn the dial till "Red Fred' is in the shed. Once he's in the shed the top number under the DOG will be your bearing.

How do compasses work?

A magnetic compass contains a small bar magnet. The Earth has a magnetic field. The compass needle points in the direction of the Earth's magnetic field. It attracts to North and South poles.