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1)the magnetic field is strongest near_________of a bar magnet.
a)the poles b)the center

2)the needle of compass line up with earth magnetic field and point to_________
a)earth poles b)earth equator

3)magnetic field lines that curve toward each other show_________
a)repulsion b)attraction

4)some animals have tiny pieces of ___________in their brains to help them find their way
a)magnetite b)magnetosphere

5)a magnet contain a large number of magnetic _____that are lined up and pointed in the same direction.
a)domains b)poles

Sagot :

1. Is A. at the poles because thats where the magnetic field is going out then coming back into the earth to produce the magnetic field.
2. Again its A. because the compass needle is attracted to " north " which is magnetic south. It does this because opposites attract.
3. This one would be B. Because if the magnets were being repelled the magnetic field lines would look like there was a line that the field hit and bounced off of it.
4. This answer is A. the magnetite helps them migrate so they know which way is north and which way is south.
5. This answer is A. Because without the domains there wouldn't be poles on the magnetic object. 

Answer:

1 . a) the poles

2. a) earth poles.

3. b) attraction.

4. a) magnetite.

5. a) domains.

Explanation:

The magnetic field is strongest at the poles and very weak at the center of the magnet.

The magnetic compass will always align along the north - south poles  of the earth. North of the compass needle is attracted towards the magnetic south pole of the earth.

Magnetic Field lines begin at the north pole of the magnet and end at the south pole. Unlike poles attract and like poles repel , so they curve for unlike poles.

Magnetite is a magnetic mineral, which is present in the animal brains , enabling them to identify correct directions.

Magnetic domains are regions where individual magnetic moments of the atoms are aligned in a definite direction.

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