Diatoms and Their Industrial Uses

What makes diatoms indestructible and gritty?

• Their photosynthetic ability

• Their cellulose cell wall

• Their ability to float

• Their silica content

What is diatomaceous earth primarily used for in industries?

• As a food additive

• As a filter in brewing and purification

• As a fertilizer

• As a fuel source

Which of the following is NOT an application of diatomaceous earth?

• Producing solar panels

• Making insulating bricks

• Manufacturing dynamite

• Enhancing paint visibility

How do diatoms indicate water pollution?

• They change color in polluted water

• They multiply rapidly in polluted water

• They do not grow in polluted water

• They emit a foul odor in polluted water

Which organism is mentioned as another indicator of pollution besides diatoms?

• Algae

• Coral

• E. coli

• Plankton