1.
The process of a material becoming incorporated uniformly into another or mixing together evenly.
Correct Answer
B. Dissolving
Explanation
Dissolving refers to the process of a material becoming incorporated uniformly into another or mixing together evenly. In this process, the solute particles break down and disperse evenly throughout the solvent, resulting in a homogeneous solution. This can occur when a solid solute is added to a liquid solvent, such as salt dissolving in water. The solute particles separate and mix with the solvent particles, creating a solution where the solute is evenly distributed.
2.
To turn into gas, like water into water vapor.
Correct Answer
C. Evaporate
Explanation
Evaporate is the correct answer because it refers to the process of turning a liquid into a gas, just like water turning into water vapor. Ferment and molecule are unrelated terms, while product does not accurately describe the process of turning into a gas.
3.
A gradual chemical change takes place without oxygen, caused by organisms such as bacteria or yeast.
Correct Answer
A. Fermenting
Explanation
Fermenting refers to a process in which a gradual chemical change occurs without the presence of oxygen. This process is typically caused by organisms like bacteria or yeast. During fermentation, these organisms break down complex substances, such as sugars, into simpler compounds, resulting in the production of various products like alcohol or acids. This process is commonly used in the production of beverages like wine or beer, as well as in the making of certain foods like bread or yogurt.
4.
The chemical processes that take place in a living cell or organism.
Correct Answer
D. Metabolism
Explanation
Metabolism refers to the chemical processes that occur within a living cell or organism. It involves the conversion of reactants, such as nutrients, into energy and other essential molecules required for the maintenance and growth of the organism. Metabolism includes various reactions, such as breaking down complex molecules (catabolism) and building up new molecules (anabolism). It is a crucial process for sustaining life and allows organisms to obtain energy from their environment.
5.
A substance containing two or more materials with different properties.
Correct Answer
A. Mixture
Explanation
A mixture is a substance that contains two or more materials with different properties. In a mixture, the different materials are not chemically combined, meaning they can be separated by physical means. This is in contrast to an alloy, which is a mixture of metals, or a crystal, which is a solid with a regular repeating pattern. Concentration refers to the amount of a substance in a mixture, but it does not necessarily imply the presence of different materials.
6.
An arrangement of the elements that provide information about their properties.
Correct Answer
D. Periodic table
Explanation
The given words "product," "precipitate," "citric," and "periodic table" all relate to chemistry. However, the only option that directly matches the given description of "an arrangement of the elements that provide information about their properties" is the "periodic table." This table organizes all known elements based on their atomic number, electron configuration, and recurring chemical properties, making it a comprehensive source of information about the properties of elements.
7.
A solid material that forms during a chemical reaction.
Correct Answer
B. Precipitate
Explanation
A precipitate is a solid material that forms during a chemical reaction. When two or more substances react, a new substance may be formed that is insoluble in the reaction mixture. This insoluble substance then separates out of the solution and settles at the bottom as a solid precipitate. Precipitates are commonly formed in reactions involving the mixing of two aqueous solutions, where a chemical reaction occurs and a solid product is produced.
8.
A characteristic of an object that can be observed, such as size, color, shape, or texture.
Correct Answer
C. Property
Explanation
A property refers to a characteristic of an object that can be observed, such as its size, color, shape, or texture. It is a measurable or observable attribute that helps to describe or identify an object. In this context, the term "property" is the most relevant option as it aligns with the given definition. The other options, synthetic, evaporate, and mixture, do not accurately describe a characteristic of an object that can be observed.
9.
A solution in which as much solute as possible has been dissolved.
Correct Answer
D. Saturated solution
Explanation
A saturated solution is a solution that has reached its maximum capacity to dissolve a solute. In this solution, no more solute can be dissolved at the given temperature and pressure. Therefore, it is a solution in which as much solute as possible has been dissolved.
10.
Capable of being dissolved.
Correct Answer
B. Soluble
Explanation
Soluble means capable of being dissolved. It refers to a substance that can be dissolved in a solvent to form a homogeneous mixture, known as a solution. Soluble substances can be broken down into smaller particles and evenly distributed throughout the solvent. This term is often used in chemistry to describe the ability of a substance to dissolve in a particular solvent.
11.
A special mixture formed when one or more materials dissolve in another.
Correct Answer
A. Solution
Explanation
A solution is a special mixture that is formed when one or more materials dissolve in another. In a solution, the substances that dissolve are called solutes, and the substance that they dissolve in is called the solvent. Solutions can be found in various forms, such as solid solutions (like alloys), liquid solutions (like saltwater), or gaseous solutions (like air). The solutes and solvents in a solution are evenly distributed at a molecular level, resulting in a homogeneous mixture. Solutions are commonly encountered in everyday life, from beverages like coffee or soda to cleaning agents and pharmaceutical products.
12.
The process of treating rubber chemically in order to give it useful properties such as strength and temperature stability.
Correct Answer
D. Vulcanization
Explanation
Vulcanization is the correct answer because it refers to the process of treating rubber chemically to enhance its properties, such as strength and temperature stability. This process involves adding sulfur or other additives to the rubber, which creates cross-links between the polymer chains, making the rubber more durable and resistant to heat and other external factors. Vulcanization is widely used in the production of various rubber products, including tires, hoses, and seals.
13.
The smallest particle of an element.
Correct Answer
D. Atom
Explanation
An atom is the smallest particle of an element. It is the basic unit of matter and cannot be broken down further without losing its properties. Atoms consist of a nucleus, which contains protons and neutrons, and electrons that orbit around the nucleus. The concept of atoms is fundamental to understanding the composition and behavior of all matter in the universe.
14.
The attachment between two atoms in a molecule.
Correct Answer
A. Chemical bond
Explanation
A chemical bond refers to the attachment between two atoms in a molecule. It is a force that holds the atoms together and is formed by the sharing or transfer of electrons between the atoms. This bond is essential for the stability and formation of molecules, as it determines the arrangement of atoms and their chemical properties. Chemical bonds can be covalent, where electrons are shared, or ionic, where electrons are transferred. They play a crucial role in various chemical reactions and the formation of different compounds.
15.
A person trained in chemistry.
Correct Answer
C. Chemist
Explanation
The term "chemist" refers to a person who is trained in chemistry. Chemistry is a scientific discipline that involves the study of matter, its properties, composition, and interactions. A chemist is knowledgeable about various chemical processes, reactions, and experiments. They are skilled in analyzing and interpreting data, conducting experiments, and developing new substances or materials. Therefore, a person trained in chemistry is commonly referred to as a chemist.
16.
A substance made of two or more elements that are chemically combined.
Correct Answer
C. Compound
Explanation
A compound is a substance formed when two or more elements chemically combine. In a compound, the elements are held together by chemical bonds. This is different from a mixture, where the elements are physically combined and can be separated easily. Compounds have unique properties that are different from the properties of the individual elements that make them up. Therefore, the correct answer is compound.
17.
The relative amount of a substance in a mixture.
Correct Answer
B. Concentration
Explanation
Concentration refers to the relative amount of a substance in a mixture. It is a measure of how much solute is dissolved in a given amount of solvent or solution. It can be expressed in various units such as moles per liter, percent by volume, or parts per million. In chemistry, concentration is an important parameter as it determines the strength or intensity of a solution.
18.
The ratio of the mass of a material in proportion to its volume.
Correct Answer
D. Density
Explanation
Density is defined as the ratio of the mass of a material to its volume. It is a physical property that helps determine how much mass is packed into a given volume. Density can be used to identify different substances or determine if a substance will float or sink in a particular medium. It is calculated by dividing the mass of the material by its volume, and the resulting value is expressed in units such as grams per cubic centimeter or kilograms per liter.
19.
To make a solution less concentrated, usually by adding more liquid.
Correct Answer
D. Dilute
Explanation
Dilute means to make a solution less concentrated by adding more liquid. This process involves adding a solvent to a solute in order to decrease its concentration. By increasing the volume of the solution, the concentration of the solute decreases, resulting in a less concentrated solution. Dilution is commonly used in various fields, such as chemistry and medicine, to adjust the concentration of substances for different purposes.
20.
The solid form of a material that can be identified by its natural shape or pattern.
Correct Answer
A. Crystal
Explanation
A crystal is the solid form of a material that has a distinct natural shape or pattern. Crystals are formed when the atoms or molecules in a material arrange themselves in a repeating pattern, creating a solid structure with flat faces and sharp edges. This unique structure gives crystals their characteristic shape and allows them to exhibit specific physical properties such as transparency, hardness, and the ability to refract light. Crystals can be found in various forms, such as gemstones, minerals, and salts.