Front

What is a fingerprint?

Back

A fingerprint is the unique pattern of ridges and valleys on the surface of a person's finger, used for identification.

Front

What are the main types of fingerprints?

Back

The main types of fingerprints are: 1. Arch 2. Loop 3. Whorl

Front

What is a plain whorl fingerprint?

Back

A plain whorl fingerprint has circular or spiral patterns and is one of the most common types of fingerprints.

Front

What is pH?

Back

pH is a scale used to measure how acidic or basic a substance is, ranging from 0 (very acidic) to 14 (very basic).

Front

What pH level do lemon juice and vinegar have?

Back

Lemon juice and vinegar both have a pH level of around 2, making them acidic.

Front

Is copper a heavy metal?

Back

Yes, copper is considered a heavy metal due to its density and weight.

Front

What happens when iodine is added to corn starch?

Back

When iodine is added to corn starch, it turns black and solidifies, indicating the presence of starch.

Front

What is an arch fingerprint?

Back

An arch fingerprint is a type of fingerprint pattern that rises in the center and has no loops.

Front

What is the significance of fingerprints in crime investigation?

Back

Fingerprints are unique to each individual and can be used to identify suspects or victims in criminal cases.

Front

What is the difference between a loop and a whorl fingerprint?

Back

A loop fingerprint has one or more ridges that enter from one side and exit the same side, while a whorl fingerprint has circular or spiral patterns.