Explanation

Natural disasters such as earthquakes, volcanic eruptions, and floods can alter the Earth's surface, changing the shape of the land.

These events can lead to the formation of new landforms or the destruction of existing ones.

Explanation

"Every" is a distributive adjective.

Because it refers to individual members of a group one at a time (e.g., "every species" emphasizes each species separately).

Explanation

Half of the chord is 8/2 = 4 cm, and distance from the center is 3 cm, forming a right triangle.

Use Pythagoras: radius² = 3² + 4² = 9 + 16 = 25 ⇒ radius = 5 cm, so diameter = 2 × 5 = 10 cm.

Explanation

The theoretical probability of getting a head on a fair coin toss is always 1/2, regardless of how many times it is tossed.

So, even if a coin is tossed 6 times, the probability of head on a single toss remains:

Correct answer: 1/2

Explanation

Odd numbers from 21 to 33:

21, 23, 25, 27, 29, 31, 33

(7 numbers)

Step-by-step:

Sum = 21 + 23 + 25 + 27 + 29 + 31 + 33 = 189

Average = 189 ÷ 7 = 27

Explanation

Area of carpeting part = (74 + 4) * (61 + 4) - 74 * 61

= 78 * 65 - 4514

= 5070 - 4514

= 556 cm²

Explanation

Greenhouse Effect refers to the process where certain gases, like carbon dioxide and methane, trap heat from the sun in the Earth's atmosphere, leading to an increase in temperature.

It is a natural process, but human activities have intensified it, contributing to global warming.

Explanation

Carboxy methyl cellulose (CMC) helps keep dirt suspended in water after it is removed from clothes, preventing it from re-depositing.

If washing powder lacks CMC, dirt may settle back onto the fabric during washing.

Explanation

In English, adjectives are ordered in a specific sequence: opinion, size, age, shape, color, proper adjective, purpose.

"Small," "new," "square," and "blue" follow the correct adjective order.

Explanation

Given the calculation:

70 decreased in 2:5

New value = 70 * (2/5)

= 70 * 0.4

= 28