Explanation

• The ozone layer is a layer of gas in the stratosphere that contains a high concentration of ozone (O3).
• It absorbs most of the sun's ultraviolet (UV) radiation, protecting the Earth from harmful UV rays.

Explanation

Explanation

A food chain always begins with producers.

It usually green plants or algae, that make their own food through photosynthesis.

Explanation

Explanation

• A plane mirror produces a virtual image, meaning it's not a real image that can be projected onto a screen.
• The image is also upright, meaning it's not inverted or flipped.

Explanation

Summative evaluation is conducted at the end of a course or term to judge overall learning outcomes.

It helps in assigning grades and determining the effectiveness of instruction.

Explanation

Respiration involves two main processes:

1. Mechanical Process (Ventilation):

• Breathing in (inhalation)
• Breathing out (exhalation)
• Movement of air in and out of the lungs

2. Biochemical Process (Respiratory Exchange):

• Exchange of oxygen and carbon dioxide between the lungs and blood
• Transport of oxygen and carbon dioxide through the bloodstream
• Cellular respiration (cellular metabolism)

Explanation

CPU speed is typically measured in Megahertz (MHz) or Gigahertz (GHz).

It indicating millions/billions of cycles per second.

Mbps measures internet speed.

Mbytes measure data size.

Explanation

Ontology is a branch of philosophy/metaphysics that studies the nature of being and existence.

It explores what kinds of things exist and how they relate to each other in reality.

Explanation

Length = x³ - x + 2

= (2)³ - 2 + 2

= 8 - 2 + 2

= 8

Width = x + x²

= 2 + (2)²

= 2 + 4

= 6

Area = Length * Width

= 8 * 6

= 48