Explanation

The Mesopotamian Civilization developed between the Tigris (Dajla) and Euphrates (Furat) rivers.

This region is also known as the "Cradle of Civilization."

Explanation

Mercury (Hg) is used in thermometers.

Because it expands and contracts consistently with temperature changes.

It providing accurate readings.

It also emits ultraviolet light in fluorescent tubes when electrically excited.

Explanation

Iron rusts when it reacts with oxygen and water in the air, forming iron hydroxide (Fe(OH)₃).

This compound eventually dehydrates to form iron oxide, the reddish-brown rust.

Explanation

Polyisoprene is the synthetic version of natural rubber.

It has similar properties.

It is commonly used to make rubber products.

Explanation

Checking prior knowledge helps the teacher connect the new lesson with what students already know.

It ensures that the foundation is strong before introducing new concepts.

Explanation

To find the LCM (Least Common Multiple) of 10, 16, and 25:

Prime factorization:

10 = 2 × 5

16 = 2⁴

25 = 5²

Now take the highest power of each prime:

2⁴ (from 16)

5² (from 25)

LCM = 2⁴ × 5² = 16 × 25 = 400

Explanation

Given x < 0 and y < z:

When multiplying both sides of y < z by x, the inequality sign flips because x is negative:

xy > xz

Explanation

"Condone" means to overlook or accept something wrong.

The sentence correctly reads: "He does not condone anti-social habits."

Explanation

Cations are positively charged ions. 

Cations are formed when a metal loses its electrons.

Explanation

A teacher acts as a guide, helping students understand concepts, develop skills, and shape their character.

While teachers can also be role models, their primary role is to guide learning and personal development.