Understanding Smell and Rain

What did Sum initially find amusing about losing his sense of smell?

• He didn't have to smell unpleasant odors.

• He could identify smells more accurately.

• He could no longer smell his favorite foods.

• He could smell things from a distance.

Why did Sum's food taste bland without his sense of smell?

• The food was not cooked properly.

• The food was too spicy.

• The sense of smell enhances the flavor of food.

• He was not hungry.

What is the role of olfactory receptor neurons?

• They block harmful smells from entering the nose.

• They enhance the sense of taste.

• They detect chemicals that make up odors.

• They produce mucus in the nose.

What is petrichor?

• The smell of rain after a dry spell.

• A type of soil bacteria.

• A chemical produced by plants.

• A type of rain cloud.

What causes the smell of rain?

• Dust particles in the atmosphere.

• Evaporation of water.

• Geosmin and plant oils mixing with air.

• Perfume in the air.