Explanation

Sodium chloride (NaCl) dissolves in water because it is an ionic compound that dissociates into ions.

Water molecules surround and separate the sodium and chloride ions, allowing it to dissolve.

Explanation

Washing soda, also known as sodium carbonate (Na₂CO₃).

It is made up of sodium (Na), carbon (C), and oxygen (O).

It is commonly used for cleaning purposes due to its ability to soften water and remove stains.

Explanation

Spirogyra, Volvox, and Chlamydomonas are all types of algae.

They are simple, photosynthetic organisms.

They belong to the Kingdom Protista.

They are commonly found in freshwater environments.

Explanation

Explanation

Most low Earth orbit space stations, like the ISS, complete one full orbit in about 90 minutes.

This allows them to circle the Earth roughly 16 times per day.

Explanation

Helium (He) is a noble gas.

Its atoms do not naturally bond with each other under standard conditions.

It exists as monoatomic (single-atom) molecules.

Nitrogen (N₂), Oxygen (O₂), and Hydrogen (H₂) are diatomic molecules.

It means they naturally form bonds between two atoms of the same element.

Explanation

In an ecosystem, living things interact by competing, cooperating, and depending on each other for food, shelter, and survival.

These interactions form complex relationships like food chains and symbiosis.

Explanation

Cyclones are formed when air moves from high-pressure to low-pressure areas, causing a rotating storm system.

This movement creates strong winds and often heavy rainfall, common in tropical regions.

Explanation

The term complementarity refers to the specific pairing of nitrogenous bases in DNA: Adenine pairs with Thymine, and Cytosine pairs with Guanine.

This rule ensures accurate DNA replication and structure.

Explanation

As two atoms come closer, attractive forces (like between electrons and nuclei) try to pull them together.

Simultaneously, repulsive forces (like between electron clouds or nuclei) also increase, balancing the interaction.