Explanation

• Zero error is a type of systematic error that occurs when the instrument's zero point is not accurately calibrated, resulting in a consistent error in all measurements.
• Systematic errors are biases that affect the accuracy of a measurement, and zero error is a specific type of systematic error.

Explanation

In the five-kingdom system, viruses are not placed in any of the five kingdoms:

1. Monera (bacteria)
2. Protista (eukaryotic organisms)
3. Plantae (plants)
4. Animalia (animals)
5. Fungi (fungi)

Viruses are considered non-living entities.

So, in the five-kingdom system, viruses are not classified in any of the five kingdoms.

Explanation

The head-to-tail rule is a method for adding vectors, such as forces, by lining up the head of one vector with the tail of the next vector.

This rule can be used to add any number of forces, not just two or three.

Explanation

The elements in group VIIA of the periodic table are called halogens.

This group consists of the following elements:

• Fluorine (F)
• Chlorine (Cl)
• Bromine (Br)
• Iodine (I)
• Astatine (At)
• Tennessine (Ts)

Explanation

In an open circulatory system, blood bathes the tissues directly, flowing through spaces among tissues, such as sinuses or lacunae. This type of circulation is found in:

• Invertebrates like insects, mollusks, and crustaceans
• Some lower vertebrates like fish and amphibians

Explanation

• The correct sequence of classifying an organism is: Kingdom → Phylum → Class → Order → Family → Genus → Species
• This sequence is known as the taxonomic hierarchy or Linnaean system, developed by Carl Linnaeus.
• It categorizes living things from most general (Kingdom) to most specific (Species).

Explanation

A solid has a fixed shape and a definite volume, regardless of its container.

The particles (molecules, atoms, or ions) in a solid are closely packed and have a fixed position, giving the solid its rigidity and shape.

Explanation

Elastic deformation occurs when a material temporarily changes shape in response to an external force, but returns to its original dimensions when the force is removed.

This type of deformation is reversible, meaning the material returns to its original state.

Explanation

• The atomic number 19 corresponds to the element Potassium (K).
• The electron configuration of Potassium is: 1s² 2s² 2p⁶ 3s¹
• Which can be simplified to: 2, 8, 8, 1.

Explanation

• A hypothesis is a proposed explanation for a phenomenon or a problem that can be tested through scientific investigation.
• It is a educated guess that provides a possible answer to a question or problem.
• A hypothesis must be testable and falsifiable, meaning that it can be proven or disproven through experimentation or data collection.