QCAA Physics Alternative Sequence Gravity and motion

Incorrect. A force acting parallel to the surface is typically friction. The term "normal" in physics specifically means perpendicular.

Correct. By definition, the normal force is a contact force that always acts perpendicular (at a $90^\circ$ angle) to the surface an object is resting on or pressing against.

Incorrect. While this is true for objects on a perfectly horizontal surface, the normal force acts at an angle on an inclined plane and horizontally if an object is pressed against a vertical wall.

Incorrect. Gravitational force always pulls straight down toward the center of the Earth, while the normal force pushes outward perpendicularly from the contact surface.

This defines gravitational field strength ($g = F/m$), which is a specific vector quantity at a point, rather than the concept of the field itself.

This is the definition of gravitational potential energy, which is the energy an object possesses due to its position, not the field.

A gravitational field is conceptually defined as the region of space around a mass where another mass will experience a force of gravitational attraction.

This describes concepts related to gravitational potential and work done, rather than defining the region of space that constitutes the gravitational field.