H. G. Wells Mastery Practice Quiz

The first step in the scientific method is to ask a question, which sets the basis for investigation. This inquiry drives the process of forming hypotheses and designing experiments.

The atomic number represents the number of protons in the nucleus of an atom. This fundamental property uniquely identifies each element on the periodic table.

Chlorophyll is the key pigment that absorbs sunlight for the process of photosynthesis. Its green color is a hallmark of most plants.

Newton's First Law, or the law of inertia, states that an object will maintain its state of rest or uniform motion unless acted upon by an external force. This concept is fundamental to understanding the behavior of objects in motion.

In a solid, the particles are arranged in a fixed, orderly pattern, giving it a definite shape and volume. This distinguishes solids from liquids and gases, where particles are more loosely arranged.

Evaporation is the process in which liquid water is converted into water vapor when it absorbs heat. This process occurs at the surface of the liquid and is key to the water cycle.

Coefficients in a chemical equation indicate the number of molecules or moles participating in the reaction. They are essential for ensuring that the equation follows the law of conservation of mass.

A catalyst works by lowering the activation energy required for a reaction to occur, thereby increasing the rate of the reaction. It remains unchanged after the reaction is complete.

The energy stored in chemical bonds is known as potential energy. This energy can be released during chemical reactions, powering changes in molecular structure.

Mitochondria are responsible for generating ATP, the main energy currency of the cell. This function earns them the title of the powerhouse of the cell.

Earth's seasons are caused by its axial tilt, which changes the angle at which sunlight strikes different parts of the planet throughout the year. This tilt results in variations in temperature and daylight hours.

Boyle's Law states that for a given mass of gas at constant temperature, the pressure is inversely proportional to its volume. This fundamental principle helps explain the behavior of gases under compression.

Satellites experience weightlessness because they are in a continuous state of free-fall towards Earth. This free-fall condition means that both the satellite and its occupants experience the same acceleration due to gravity.

Meiosis is the type of cell division that produces gametes, such as sperm and eggs, by reducing the chromosome number by half. This process is critical for sexual reproduction and genetic diversity.

The pH scale is a measure of the concentration of hydrogen ions in a solution, indicating its acidity or basicity. Lower pH values correspond to higher acidity, while higher values indicate a basic solution.

In a redox reaction, the oxidizing agent gains electrons and is itself reduced. Understanding this electron exchange is vital for grasping many chemical processes.

Increasing temperature boosts the kinetic energy of particles, causing them to move faster and collide more often. This elevated collision frequency generally leads to an increased reaction rate as described by the Arrhenius equation.

Centripetal force is the net force that pulls an object toward the center of its circular path, keeping it in orbit. This inward force is crucial for maintaining circular motion despite the object's constant speed.

Codominance occurs when both alleles in a heterozygous organism are equally expressed, resulting in a phenotype that shows traits from both alleles. This inheritance pattern is distinct from dominant-recessive relationships where one allele masks the effect of the other.

The Doppler effect refers to the alteration in frequency or wavelength of a wave as observed when there is relative motion between the source and the observer. This phenomenon is observed in both sound and light waves, and it has important applications in astronomy and radar technology.