Science Vocabulary Quiz

A magnet is defined as an object that attracts iron and some other materials with its natural or induced force field that surrounds it. This force field is created by the alignment of the magnetic domains within the material, which causes it to have a magnetic field. This magnetic field can attract certain materials, such as iron, and pull them towards the magnet. This property of magnets is widely used in various applications, such as in compasses, motors, and magnetic storage devices.

An electron is a negatively charged particle that exists independently or outside the nucleus of an atom. It is not a type of breakfast cereal or a large machine for sorting metal. Electrons play a crucial role in determining the chemical behavior of atoms and are involved in various processes such as electricity, magnetism, and chemical bonding.

The correct answer is "An arrangement of electronic elements like conductors through which electric current moves." This answer accurately defines a circuit as a system of interconnected electronic components that allows the flow of electric current. It highlights the essential elements of a circuit, such as conductors, which facilitate the movement of electrons, and emphasizes the purpose of a circuit, which is to enable the flow of electric current. The other options are unrelated to the concept of a circuit and do not accurately describe its definition.

The correct answer is "An instrument for determining direction. This type of instrument has a horizontal magnetic needle that rotates freely until it points to the magnetic north." A compass is commonly known as a navigational instrument that uses the Earth's magnetic field to determine direction. It consists of a magnetic needle that aligns itself with the Earth's magnetic field, pointing towards the magnetic north. This allows individuals to navigate and find their way accurately, making it an essential tool for travelers, hikers, and sailors.

Electricity is defined as the physical phenomenon caused by charged particles flowing between points having different electrical charges. This definition accurately describes the fundamental nature of electricity, which involves the movement of charged particles, such as electrons, in response to a potential difference between two points. This flow of charged particles is what allows electricity to power various devices and systems in our daily lives.

Lodestone is defined as a rock that possesses magnetic properties and attracts iron and magnetite. It is a naturally occurring mineral composed of magnetite, which is a type of iron oxide. Lodestone has the ability to attract and hold small pieces of iron or other magnetic materials. It has been used for centuries in navigation and as a natural compass.

Force is defined as active power, energy, or physical strength. This definition aligns with the understanding of force in physics, where it is described as a push or pull that can cause an object to accelerate or deform. The reference to Jedi having it suggests a connection to the concept of "The Force" in the Star Wars universe, which encompasses a mystical energy that Jedi can tap into for various abilities. However, in the context of this question, the correct answer focuses on the general definition of force as a physical concept.

An electromagnet is a magnet that is created by passing an electric current through a coil of wire, which in turn magnetizes an iron or steel core. This process allows the electromagnet to generate a magnetic field that can attract or repel other objects. Unlike a permanent magnet, an electromagnet can be turned on and off by controlling the flow of electric current. This makes electromagnets extremely useful in a wide range of applications, such as electric motors, generators, and magnetic resonance imaging (MRI) machines.

The correct answer is "A device that generates electricity through chemical reactions." A battery is a device that converts chemical energy into electrical energy through a chemical reaction. It consists of one or more electrochemical cells that store and release electrical energy. When a chemical reaction occurs inside the battery, it produces a flow of electrons, which can be harnessed to power various devices. Therefore, a battery is a device that generates electricity through chemical reactions.

The correct answer is "To cause something to come near." The word "attract" means to draw or pull something towards oneself or to cause something to approach or come closer. It implies the ability to create an appealing or compelling force that captures attention and interest, resulting in a desired outcome of bringing something closer.

Current is defined as the flow of electricity in a conductor. It refers to the movement of electric charges, such as electrons, through a material like a wire. This flow of charges creates an electric current, which is measured in units called amperes. The concept of current is fundamental in understanding and analyzing electrical circuits and systems.

The correct answer is "To drive away or force backwards." This definition of repel means to push something away or make it move in the opposite direction. It implies a strong force or action that causes separation or distance between objects or individuals.