Bomb disposal experts looking at shells found in Sa'ada, Yemen

The video tutorial discusses the origin and collection of samples, including a conversation about a rock and preferences for flat surfaces. It also covers the topic of water and how samples are collected and stored in containers.

Where do the samples mentioned in the video originate from?

• From a nearby river

• From a laboratory experiment

• From previously collected samples

• From the boxes three days ago

What is the speaker's preference when it comes to surfaces?

• Flat

• Smooth

• Rough

• Curved

What is the significance of the water mentioned in the video?

• It is part of a large sample

• It is used for cleaning

• It is used for drinking

• It is from a nearby lake

How long ago was the water sample collected?

• Yesterday

• Three days ago

• A week ago

• A month ago

What is the purpose of the containers mentioned in the video?

• To collect rainwater

• To transport goods

• To hold samples

• To store food