Who made the first calendar?

In a transformer, the secondary coil has 300 turns and the primary coil has 50 turns. The primary coil has a voltage of 12V. If 3.0 A flows in the primary coil, what is the current in the secondary coil?

A government implements industrial biotechnology to produce energy from renewable biological sources instead of burning fossil fuels. What is the main environmental benefit of this approach?

A research team is working on developing new biological products using microorganisms and genetic techniques. They refer to the pioneering work of a scientist known for his contributions to biotechnology. Who is this scientist?

Who wrote The Skeptical Chemist, a foundational work in chemistry that emphasized careful experimentation and skepticism of unproven theories?

Which element has more chemical activity?

The gram-molecular weight of Sodium Chloride?

Average nucleus diameter?

Which of the following elements has the smallest atomic radius?

A constant force of $$2\ \mathrm{N}$$ acts on an object, causing its momentum to change by $$120\ \mathrm{kg\cdot m/s}$$ . Determine the time interval during which the force was applied.

The approximate value of velocity of the ball before it hits the ground after $$5\ \mathrm{s}$$ ?

________ is a condition in which no living disease-causing microorganisms are present.

A planet takes $$1.52$$ years to orbit its star. Another planet orbits at a slightly larger distance such that its orbital period becomes:

The old machine has 1/10 decibel of that new machine which has $$118$$ decibels. What is the sound level of the new machine.

Deer, elk, and reindeer share similar physical traits, such as antlers, ruminant digestion, and body structure. These similarities indicate that they belong to the same:

The Yak in Central Asia, the Bison in North America, and the water buffalo in Southeast Asia belong to different species. Over time, they developed distinct physical and behavioral traits as adaptations to their specific environments. What type of evolution does this illustrate?

Which international agreement, signed by 197 countries in 1997, was the first to address climate change and set binding targets for reducing greenhouse gas emissions?

Which international agreement aims to limit global warming to well below 2°C above pre-industrial levels, in order to combat climate change?

All of the following organelles can be found in both plant and animal cells EXCEPT:

Diamond is a/an __________ of Carbon?

Mycology is to fungi, Covid-19 is to __________?

A scientist studies the smallest structural and functional units of all living organisms. These units are called:

Energy production, protein synthesis, and reproduction independently. Which biological unit is she studying?

A researcher studies how glucose is broken down to release energy, how amino acids are used to build proteins, and how DNA is replicated in cells. Which branch of science focuses on these molecular and biomolecular processes in the body?

A patient presents with diarrhea, UTI, and abdominal cramps. Laboratory tests reveal that the infections are caused by a common bacterium normally found in the intestines. Which bacterium is most likely responsible?

A generator is a device that converts:

Which device converts electrical energy into mechanical energy?

Which type of material produces the greatest induced current when used in a coil?

Which of the following is NOT considered a use or process of biotechnology?

An electric appliance operates at a current of 3 A and a voltage of 120 V. What is its power rating?

Which scientist is known for quantitative experiments with chemical reactions that contributed to the development of stoichiometry, establishing precise measurements of elements and compounds?

Colorless crystalline substance that serves as a primary source of energy in the human diet?

Which of the following carbohydrates is composed of exactly two monosaccharide units and must be broken down by enzymes before the body can use it for energy?

Arrange the following environmental threats from most harmful to least harmful:

Arrange the following biological structures from smallest to largest:

Arrange the following ecological levels from largest to smallest:

A species of frog normally has 24 chromosomes in its body cells. However, the reproductive cells of this frog contain only 12 chromosomes. Which cellular process is responsible for producing these reproductive cells with half the normal number of chromosomes?

Which type of atomic nucleus is the MOST stable?

A coastal community noticed that after months of heavy fertilizer use on nearby farms, thick layers of algae began to grow on the surface of the sea. Sunlight could no longer penetrate the water, and oxygen levels dropped significantly, causing many fish and marine organisms to die. Which impact will most likely occur as a result of this process of eutrophication?

A scientist observes that organisms with favorable traits are more likely to survive and reproduce, passing those traits to future generations. This idea forms the basis of the theory of evolution. Who proposed this theory?

The long neck of a giraffe allows it to reach high leaves, the chameleon can change its color to avoid predators, and the polar bear has thick fur to survive cold environments. These characteristics are examples of:

Horse is to Equus as Cat is to:

A macromolecule providing strength and support to tissues like skin, bones, tendons, and ligaments?

Which element makes up approximately 18% of the human body by mass and is a key component of organic molecules?

What is the correct name of the compound with the formula NaSO4?

What is the correct name of the compound with the formula Na2S?

__________, also known as the molecular structure, is the three-dimensional structure or arrangement of atoms in a molecule.

Which of the following is the main cause of the rotation of large typhoons in the Northern and Southern Hemispheres?

Which of the following is not an herb?

The composition of the atmosphere is approximately: Nitrogen 79%, Oxygen 21%, Argon 0.93%, Carbon dioxide 0.04%. What is the partial pressure of nitrogen in the atmosphere at a total pressure of 100 Pa?

Which of the following is a vertebrate?

The highest classification of plants and animals?

Catalyst is to Enzyme, Hydrolysis is to ________?

Students are having difficulty distinguishing between different types of fungi. Which teaching strategy would be most appropriate to help them recognize the differences?

Despite the continuous processes of evaporation, condensation, and precipitation, what happens to the total amount of water on Earth?

Which of the following quantities should be increased to produce a greater electric current in a circuit?

A male child has been diagnosed with hemophilia, an X-linked recessive disorder. Considering the pattern of inheritance of sex-linked traits, from which parent did he inherit the gene responsible for the condition?

Which of the following is independent of the other wave properties?

Consider the following statements: I. They have unstable nuclei that spontaneously undergo radioactive decay. II. They are stable atoms that emit alpha and beta particles. III. Their radioactive decay can be controlled or programmed externally. IV. They contain the same number of protons but different numbers of neutrons, and may decay if unstable. Select the correct combination.

Which scientist helped advance the field of stoichiometry through his quantitative chemical experiments?

What is the basic unit of life?

Arrange the following biological concepts and technologies in chronological order (from earliest to latest): I. Mutation II. Genetic Engineering III. Natural Selection IV. Discovery of DNA Structure V. CRISPR

Which of the following protist causes Malaria?

The gland that produces tears that keep the eye moist and protect them from infection is:

Which of the following pair of words given is not a correct functional pair?

The cell organelle that serves as the site of protein synthesis

What is the difference between plant and animal cell?

Which of the following groups of organisms is a very good source of antibiotics?

In the cell, metabolic reactions that result from the breaking down of complex materials into simpler molecules coupled with the release of energy is called

During what phase of meiosis do homologous chromosomes separate?

Mercury spilled in bodies of water in China caused illness to many residents near the area, and death to a few. Fishes and other aquatic animals, however, were not reported to be harmed by the said toxin. What could be the phenomenon that occurred?

The simplest alkene

In a stable organic compound, how many bonds will carbon form?

Which element comprises 46% of the Earth’s crust?

Which scientist is responsible for the first atomic theory?

Who proposed that electrons behave both as particles and waves, contributing to the quantum mechanical model?

What does a catalyst do to the activation energy of a chemical reaction?

What do you call the lose and gain of electrons?

The metabolism of which of the following produces the most energy?

The first organic compound that is derived from inorganic substance?

Which of the following is used to describe the path of light in physics and optics?

An idealized material that absorbs and perfectly emits electromagnetic radiation is a/an ____________?

According to Ohm’s Law, what must be greater to maintain the same current in a conductor with more resistance?

The apparent change in frequency of a sound due to the motion of the source or observer is known as the _____________.

When a metal spoon becomes hot when left in a cup of boiling water it is because of ____________.

Newton’s law of gravitation tells us that

Which of the following is TRUE about the magnitude of a displacement?

Two cars have the same mass, but one is moving three times as fast as the other. How much more work will be needed to stop the faster car?

The magnetic field of a current-carrying coil is strongest at the ________.

In a parallel circuit, if we remove one of the light bulbs, what will happen to the other light bulb?

What is the motion called when a planet seems to be moving westward in the sky?

Who was the first human to venture into outer space?

A frog is found along the edge of a pond. This location where it lives would be the frog’s ________.

The process of obtaining information by using the senses is called a/an ________.

In a two-dimensional diagram, the vertical axis is called the ____________.

What statistical test is used to compare the mean of three or more group?

What is the boiling point of Hydrogen?

John saw big crabs crawling on the sand. He wondered where they came from, so he started investigating. What scientific attitude did John show?

Which mission suffered a failure but returned safely, inspiring the phrase, “Houston, we have a problem.”?