Explanation

A food chain always begins with producers.

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

Explanation

• ECG (Electrocardiogram) is a test used to measure the electrical activity of the heart.

It is commonly used for the diagnosis of heart-related ailments, such as:

• Arrhythmias (irregular heart rhythms)
• Coronary artery disease
• Cardiac arrests
• Heart failure

Explanation

If mango juice is 20%, then apple juice is 80% (since 100% – 20% = 80%).

The ratio of mango to apple juice is 20:80, which simplifies to 1:4.

Explanation

• The greenhouse effect is an environmental problem caused by the increasing amount of carbon dioxide (CO2) in the atmosphere.
• Primarily due to human activities such as burning fossil fuels, deforestation, and land-use changes.
• This excess CO2 traps heat and leads to global warming and climate change.

Explanation

• File Management, Task (Process) Management, and Memory Management are responsibilities of the Operating System (OS)
• Memory Management: Allocates and deallocates RAM to programs, ensuring efficient access for the CPU.
• File Management: Handles the storage, organization, naming, and protection of files on storage devices.
• Task/Process Management: Creates, deletes, and schedules processes (tasks) to ensure proper CPU utilization.

Explanation

The mass of the proton is almost 1836 times heavier than that of an electron.

while

A neutron is 1842 times heavier than an electron.

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

Explanation

A syllabus is a document that outlines the topics, objectives, and structure of a subject or course.

It guides both teachers and students on what content will be covered during a specific academic period.

Explanation

Assessment is the broader process of collecting, synthesizing, and interpreting information about learning or performance.

It supports decision-making by identifying strengths, weaknesses, and progress in a learner’s development.

Explanation

Diagnostic means تشخیصی

Diagnostic assessment is used to identify students' strengths and weaknesses, helping to detect difficulties in the learning process.

It is conducted before or during the learning process to provide insights for improving teaching strategies.