Explanation

"At the station": Indicates the location where they waited.

"For twenty minutes": Specifies the duration of waiting.

Use "at" for general locations (e.g., at the park, at home).

Use "for" to indicate duration (e.g., for hours, for days).

Explanation

The Thar Desert is located in the eastern part of Pakistan, specifically in the Sindh province.

It stretches from Cholistan in Punjab to the southern part of Sindh. 

About Thar Desert

15% located in Pakistan

85% located in India

Also called Friendly Desert

Located near Badin, Sindh 

Famous for: Sand 

Coal also found in Thar 

also known as Great Indian Desert

Explanation

Period Length in Periodic Table:

Period 6 has 32 elements (including lanthanides), making it the longest.

Period 7 is incomplete but will match Period 6 when fully discovered.

Explanation

PowerPoint Shortcut:

Pressing F5 starts the slideshow from the beginning.

Shift + F5 starts it from the current slide.

Explanation

Primary Cause of 2022 Floods:

Record Monsoon Rains: Pakistan received 190% more rainfall than average (NDMA data), submerging 1/3 of the country.

Glacial Melt: Heatwaves accelerated melting, adding to water volume (UN report).

Poor Infrastructure: Weak dams, drainage systems, and urban planning worsened flooding.

Explanation

"For" indicates purpose or reason.

The phrase "for your safety" means to ensure you stay safe.

Explanation

The square root of 64 is 8, i.e. √64 = 8. 

Explanation

"Near" indicates proximity, meaning the store is close to the park.

Example: "The store is near the park."

Explanation

"For a while" indicates a duration of time (how long the action continued).

Example: "I have been ringing the doorbell for a while."

"For" + time period = Duration (e.g., for hours, for days).

"Since" + specific time = Start point (e.g., since morning).

Explanation