Free PICAT General Science Questions and Answers — Questions and Answers
Question 1: When two forces act against each other on an item, the resulting force is
- the sum of the two forces
- the difference between the two forces (Correct answer)
- the ratio of the two forces
- the product of the two forces
Correct answer: the difference between the two forces
When two forces act on an object in opposite directions, they counteract each other. The resulting or net force is calculated by finding the difference between the magnitudes of the two forces. The object will then accelerate in the direction of the larger force, or remain in equilibrium if the forces are equal.
Question 2: Which two components make up the formal binomial nomenclature (or scientific name) of a living organism?
- Class and Family
- Family and Species
- Genus and Species (Correct answer)
- Order and Class
Correct answer: Genus and Species
Binomial nomenclature, the formal system for naming species, consists of two parts. The first part is the genus name, which is always capitalized, and the second part is the specific epithet, or species name, which is never capitalized. Both parts are typically italicized, such as in *Homo sapiens*, providing a unique and universally recognized scientific name for each organism.
Question 3: Of the following, which one is NOT a fruit?
- Tomatoes
- Corn
- Carrots (Correct answer)
- Peppers
Correct answer: Carrots
Botanically, a fruit is defined as the mature ovary of a flowering plant, which typically contains seeds. Tomatoes, corn kernels, and peppers all fit this botanical definition as they develop from the flower's ovary and enclose seeds. Carrots, however, are root vegetables; they are the enlarged taproot of the plant and do not contain seeds, thus they are not fruits.
Question 4: Watts serve as a measuring unit for
- Pressure
- Power (Correct answer)
- Speed
- Energy
Correct answer: Power
Watts (W) are the standard unit of power in the International System of Units (SI). Power is defined as the rate at which work is done or energy is transferred. One watt is equivalent to one joule per second (J/s), indicating the amount of energy consumed or produced per unit of time.
Question 5: How many degrees does water go from its boiling point to its freezing point on a Celsius thermometer?
- 100 degrees (Correct answer)
- 212 degrees
- 32 degrees
- 180 degrees
Correct answer: 100 degrees
On the Celsius temperature scale, the freezing point of water is defined as 0 degrees Celsius (°C) at standard atmospheric pressure. The boiling point of water is defined as 100 degrees Celsius (°C) under the same conditions. Therefore, the temperature difference between water's boiling point and freezing point on a Celsius thermometer is exactly 100 degrees.
Question 6: A vector can be used to represent force. A vector is indicative of
- Direction
- Speed
- Magnitude
- Magnitude and Direction (Correct answer)
Correct answer: Magnitude and Direction
A vector is a mathematical quantity that possesses both magnitude (size or amount) and direction. Force is a classic example of a vector because it not only has a specific strength (e.g., 50 Newtons) but also acts in a particular direction (e.g., pushing upwards or pulling to the left). Representing force as a vector allows for accurate calculation of its effects.
Question 7: Ascorbic acid is referred to as
- Vitamin E
- Vitamin B12
- Vitamin A (Correct answer)
- Vitamin C
Correct answer: Vitamin A
Ascorbic acid is the chemical name for Vitamin C. It is an essential water-soluble vitamin vital for various bodily functions, including tissue repair, collagen synthesis, and acting as an antioxidant. The other options are incorrect: Vitamin E is tocopherol, Vitamin B12 is cobalamin, and Vitamin A is retinol.
Question 8: An illustration of this would be a pot on a hot stove.
- Conduction (Correct answer)
- Convection
- Radiation
- Insulation
Correct answer: Conduction
Conduction is the transfer of heat energy through direct physical contact between substances. When a pot is placed on a hot stove, heat from the stove burner is directly transferred to the bottom of the pot through conduction. This direct contact allows thermal energy to pass from the hotter stove element to the cooler pot, causing the pot to heat up.
Question 9: The resultant of distance and force is
- Power
- Momentum
- Work (Correct answer)
- Velocity
Correct answer: Work
In physics, Work is defined as the product of force and the distance over which that force is applied in the direction of the displacement. It represents the energy transferred to or from an object by means of a force. Therefore, when force causes an object to move a certain distance, work is done.
Question 10: What an anemometer measures
- Humidity
- Temperature
- Air Pressure
- Wind Speed (Correct answer)
Correct answer: Wind Speed
An anemometer is a scientific instrument specifically designed to measure wind speed. It typically consists of cups mounted on arms that rotate as the wind blows, with the rotation speed indicating the wind's velocity. This tool is crucial in meteorology and for various environmental studies.
Question 11: The phrase "all the organisms living in a particular place and their interactions with each other and their environment" defines which of the following terms?
- Population
- Habitat
- Community
- Ecosystem (Correct answer)
Correct answer: Ecosystem
An ecosystem encompasses all the living organisms (biotic components) in a specific area, along with their interactions with each other and with the non-living physical and chemical factors (abiotic components) of their environment. This definition highlights the interconnectedness of life and its surroundings. A population is a group of the same species, a habitat is where an organism lives, and a community is just the interacting populations of different species.
Free PICAT General Science Questions and Answers
When two forces act against each other on an item, the resulting force is
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