Question 1

What is the main function of nuclear rods inside the nuclear reactors?

Accepted Answer

(c) absorbing external radiation

Answer

(d) storing nuclear waste

Answer

(b) acting as nuclear fuel

Answer

(a) cooling the reactor

Question 2

What is the general direction of the movement of water and salts within the xylem tissues in plants?

Accepted Answer

(d) from roots to leaves for completing photosynthesis

Answer

(a) from leaves to roots for nourishment

Answer

(b) in both directions depending on plant needs

Answer

(c) from leaves to stem for support

Question 3

Which of the following represent the building unit of sedimentary rocks?

Accepted Answer

(c) Minerals

Answer

(b) Tectonic plates

Answer

(a) Organic remains

Answer

(d) Hydrocarbons

Question 4

The peripheral nervous system includes?

Accepted Answer

(b) all nerves throughout the body

Answer

(a) sensory neurons and brain

Answer

(c) spinal cord and motor neurons

Answer

(d) brain and spinal cord

Question 5

In the food chain: Green plant → Grasshopper → Mouse → Fox, which organism could be replaced by a hawk?

Accepted Answer

(b) Fox

Answer

(c) Grasshopper

Answer

(d) Green plant

Answer

(a) Mouse

Question 6

Two-dimensional nanomaterials have?

Accepted Answer

(b) two dimensions inside the nanoscale and one non-nanoscale dimension

Answer

(a) two dimensions outside the nanoscale and one nanoscale dimension

Answer

(d) two dimensions inside the nanoscale and an internal nanostructure

Answer

(c) two dimensions outside the nanoscale and an internal porous structure

Question 7

The skin layer containing hair follicles and blood vessels is?

Accepted Answer

(b) dermis

Answer

(c) hypodermis

Answer

(d) fatty layer

Answer

(a) epidermis

Question 8

What role does cobalt play in modern medical technology?

Accepted Answer

(b) It helps to deliver drugs directly to cancer cells.

Answer

(c) It is considered an essential component in nutritional supplements.

Answer

(a) It is used as a main component in artificial joints.

Answer

(d) It is used in the production of lithium-ion batteries for smart medical devices.

Question 9

The atomic number of an element atom is denoted by?

Accepted Answer

(b) Z

Answer

(d) X

Answer

(a) A

Answer

(c) N

Question 10

What happens to the rate of sweat secretion in winter?

Accepted Answer

(c) It decreases.

Answer

(b) It increases.

Answer

(a) It stops.

Answer

(d) It is not affected.

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