Choose a description from column B that best fits the term provided in column A. Write down the number of the term in column A followed by the letter of the description in column B eg 1.2.1 C. Give a suitable biological term for the following statements:

A compound is a substance formed when two or more different chemical elements are chemically bonded together.

"Table salt" (NaCl) is a common example of a compound.

1.2.2 Elements

An element is a pure substance consisting only of atoms that all have the same number of protons.

Option A, "Made up of atoms that are all of the same kind", accurately describes an element.

1.2.3 Electrons

Electrons are subatomic particles that carry a negative electrical charge.

Option B, "Negatively charged particles", describes electrons.

1.2.4 Nucleus

The nucleus is the central part of an atom, containing protons and neutrons.

Option E, "Region where protons and electrons are found", is the only remaining option. While protons are found in the nucleus, electrons are found around the nucleus. However, given the other options are clearly matched, this is the intended answer for the nucleus in the context of the atom.

1.2.5 Neutrons

Neutrons are subatomic particles found in the nucleus that have no electrical charge.

Option C, "Particles that are not charged", describes neutrons.

1.3 Give a suitable biological term for the following statements.

1.3.1 When liquid turns into gas.

This process is called vaporization, which includes evaporation and boiling.

1.3.2 Particles are close together, but can move around.

This description fits the properties of a liquid, where particles are close but have enough energy to slide past each other.

1.3.3 Movement of particles from higher concentration to lower concentration.

This is the definition of diffusion, a passive transport mechanism.

1.3.4 When a liquid turns into a solid.

This process is called freezing or solidification.

1.3.5 Matter where particles are closely packed and cannot move from position.

This description fits the properties of a solid, where particles are held in fixed positions.