1.
Any magnet has two ends, each one called a:
Correct Answer
B. Magnetic pole
Explanation
A magnet has two ends, known as magnetic poles. These poles are where the magnetic field lines originate (North pole) or terminate (South pole). The magnetic poles are responsible for the attraction or repulsion between magnets and other magnetic materials. The magnetic field refers to the region surrounding a magnet where its influence can be felt, but it is not the correct term for the ends of a magnet. Magnitized material refers to a material that has been magnetized, but it is not the correct term for the ends of a magnet.
2.
If two magnets were in this order: NS SN they would:
Correct Answer
A. Repel
Explanation
If two magnets were arranged in the order NS SN, they would repel each other. This is because like poles (N and N or S and S) repel each other, while opposite poles (N and S) attract. In this case, the magnets have the same poles facing each other, resulting in a repulsive force between them.
3.
The smallest particle of an element is known as an:
Correct Answer
D. Atom
Explanation
An atom is the smallest particle of an element. It consists of protons, neutrons, and electrons. Protons have a positive charge, neutrons have no charge, and electrons have a negative charge. Atoms combine to form molecules and are the building blocks of matter.
4.
A particle that does not carry an electrical charge is a:
Correct Answer
B. Neutron
Explanation
A neutron is a particle that does not carry an electrical charge. Unlike protons and electrons, which carry positive and negative charges respectively, neutrons are neutral and have no charge. Neutrons are found in the nucleus of an atom along with protons, while electrons orbit around the nucleus. Therefore, the correct answer is neutron.
5.
A ferromagnetic material is:
Correct Answer
A. A material that shows strong magnetic effects
Explanation
A ferromagnetic material is a material that shows strong magnetic effects. These materials have a high magnetic permeability, which means they can be easily magnetized and retain their magnetization even after the external magnetic field is removed. They exhibit properties like attraction or repulsion to magnets, the ability to form permanent magnets, and the ability to conduct magnetic fields. Examples of ferromagnetic materials include iron, nickel, and cobalt.
6.
You can tell if an object is magnetic if the groupings of atoms:
Correct Answer
B. Are lined up in the same direction
Explanation
When the groupings of atoms in an object are lined up in the same direction, it indicates that the object is magnetic. This alignment creates a magnetic field, which allows the object to attract or repel other magnetic objects. In contrast, if the groupings of atoms were scattered in all different directions or lined up in opposite directions, the object would not exhibit magnetic properties. Therefore, the fact that the groupings of atoms are lined up in the same direction suggests that the object is magnetic.
7.
A magnet made of a material that keeps its magnetism is known as a:
Correct Answer
C. Permanent magnet
Explanation
A magnet made of a material that keeps its magnetism is known as a permanent magnet. Unlike temporary magnets that lose their magnetism over time, permanent magnets retain their magnetic properties indefinitely. This is due to the alignment of the magnetic domains within the material, which creates a strong and lasting magnetic field. Permanent magnets are commonly used in various applications such as electric motors, generators, and magnetic storage devices.
8.
How can you make a magnet temporarily lose its magnetism?
Correct Answer
D. Both a & c
Explanation
Heating a magnet causes the magnetic domains within it to become disordered, disrupting the alignment of the magnetic field and thus reducing its magnetism. Similarly, hitting a magnet very hard can also cause the magnetic domains to become disordered, resulting in a temporary loss of magnetism. Therefore, both heating and hitting a magnet can make it temporarily lose its magnetism.
9.
A tiny, negatively charged particle that usually exists in the outer region of an atom is called a:
Correct Answer
B. Electron
Explanation
An electron is a tiny, negatively charged particle that usually exists in the outer region of an atom. It is one of the fundamental particles that make up an atom, along with protons and neutrons. Electrons orbit around the nucleus of an atom and are responsible for the chemical behavior of elements. They play a crucial role in bonding between atoms and determining the overall properties of matter.
10.
The lines that map out the magnetic field around a magnet are:
Correct Answer
A. Magnetic field lines
Explanation
The lines that map out the magnetic field around a magnet are called magnetic field lines. These lines represent the direction and strength of the magnetic field at different points around the magnet. They are used to visualize and understand the behavior of magnetic fields and are often depicted as curved lines that radiate outwards from one pole of the magnet to the other. The density of the lines indicates the strength of the magnetic field, with closer lines indicating a stronger field.
11.
One of about 100 basic materials that make up all matter.
Correct Answer
D. Element
Explanation
An element is a basic material that cannot be broken down into simpler substances and is composed of only one type of atom. There are about 100 elements that make up all matter, including electrons, protons, and neutrons. However, electrons, protons, and neutrons are not themselves elements, as they are subatomic particles that make up atoms.
12.
An object is not magnetized if:
Correct Answer
B. The groupings of atoms are scattered
Explanation
When the groupings of atoms are scattered, it means that the magnetic domains within the object are not aligned in any particular direction. In a magnetized object, the groupings of atoms are lined up and their magnetic fields add up to create a magnetic force. However, when the groupings of atoms are scattered, the magnetic fields cancel each other out, resulting in no overall magnetic force. Therefore, when the groupings of atoms are scattered, the object is not magnetized.
13.
How many more weeks until break?
Correct Answer
C. 5
Explanation
The correct answer is 5 because the question is asking for the number of weeks until break. Since the question does not provide any specific information about the current week or the date of the break, we can assume that the question is asking for the number of weeks from the current time until the break. Therefore, the correct answer is 5 weeks.
14.
If two magnets were in this order: NS NS they would:
Correct Answer
B. Attract
Explanation
If two magnets are in the order NS NS, it means that the north pole of one magnet is facing the south pole of the other magnet and vice versa. In this configuration, the opposite poles are facing each other, which causes them to attract each other. Therefore, the correct answer is attract.