General Science Knowledge Questions! Trivia Quiz

According to the United Nations estimate, the global population is estimated to be around 8 billion people.

The correct answer is eight because after the reclassification of Pluto as a dwarf planet in 2006, there are currently eight recognized planets in the solar system. These planets include Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.

Being composed of cells is characteristic of all living things. Cells are the basic structural and functional units of life. They are responsible for carrying out essential processes such as metabolism, growth, reproduction, and response to stimuli. All living organisms, from the simplest bacteria to complex multicellular organisms, are composed of cells. Cells provide the necessary framework for life and allow for the organization and specialization of different tissues and organs. Therefore, the presence of cells is a fundamental characteristic of all living things.

A rainbow typically has seven colors. These colors are:

Red

Orange

Yellow

Green

Blue

Indigo

Violet

These colors are often remembered by the acronym ROYGBIV, which stands for Red, Orange, Yellow, Green, Blue, Indigo, and Violet. Rainbows form when sunlight is refracted, dispersed, and reflected by water droplets in the atmosphere, creating this spectrum of colors.

Rheumatic fever is not one of the risks of smoking tobacco. Smoking tobacco is associated with various health risks such as coronary heart disease, emphysema, increased incidence of stillbirths and low-weight babies, and cancer of the bladder and pancreas. However, rheumatic fever is not directly linked to smoking tobacco. Rheumatic fever is an inflammatory disease that can occur after a streptococcal infection, particularly in children.

Conduction is the process by which energy travels from a warm substance to a colder substance. This occurs through direct contact between the particles of the two substances, where the faster-moving particles transfer their energy to the slower-moving particles. Unlike convection, which involves the movement of a fluid, or radiation, which involves the transfer of energy through electromagnetic waves, conduction relies on physical contact for energy transfer. Absorption, on the other hand, refers to the process of taking in or assimilating energy, rather than transferring it between substances.

Mercury is the planet closest to the Sun, and its orbit is located between the Sun and Earth. Therefore, it can never be seen directly overhead at midnight because it is always in close proximity to the Sun in the sky.

The answer "an explanation which is well established" is correct because Darwin's theory of evolution by natural selection is a widely accepted and extensively supported scientific explanation for the diversity of life on Earth. It is based on a vast amount of evidence from various fields of study, including paleontology, genetics, and comparative anatomy. The theory has been tested and validated over time, and it continues to be a fundamental concept in the field of biology.

Slate is not an example of a mineral because it is a metamorphic rock, not a naturally occurring inorganic solid with a specific chemical composition and a crystalline structure. Quartz, calcite, gypsum, and mica are all examples of minerals as they meet the criteria of being naturally occurring, inorganic, solid substances with a specific chemical composition and a crystalline structure. Corundum is also a mineral, so it is not the correct answer.

Technetium (Tc) is the first element that was created synthetically and is not found naturally on Earth in any significant amounts. Unlike uranium and plutonium, which can be found in trace amounts in nature, and radon, which occurs naturally as a radioactive gas, technetium is produced in nuclear reactors and is primarily used in medical diagnostics.

While many rocks contain crystals, "crystalline" is not a fundamental rock classification. The three main types of rocks are igneous, metamorphic, and sedimentary. Igneous rocks are formed from cooled magma or lava. Metamorphic rocks are formed when existing rocks are changed by heat, pressure, or chemical reactions. Sedimentary rocks are formed from the accumulation and cementation of sediments.

Humans possess approximately 20 thousand genes. Genes are segments of DNA that contain instructions for building proteins, which are essential for the structure and function of our bodies. These genes determine our physical traits, susceptibility to diseases, and other biological characteristics. The Human Genome Project, completed in 2003, estimated that humans have around 20,000 to 25,000 genes. This number is significantly smaller than initially anticipated, but ongoing research continues to refine our understanding of the human genome.

This process occurs primarily in the cores of stars, where hydrogen atoms fuse to form helium and progressively heavier elements through nuclear fusion reactions. Elements up to iron are typically formed in stars through these processes. Elements heavier than iron are often formed during supernova explosions (option c), where the intense energy and pressure facilitate the creation of heavier elements through nucleosynthesis.

The sun is never directly overhead in Roanoke, Virginia or New York City. This is because these cities are located north of the Tropic of Cancer, which means that the sun's rays never reach a point directly overhead. The sun is only directly overhead at locations between the Tropic of Cancer and the Tropic of Capricorn.