3年選択 Ocean 4

What can cause food to spoil?

• High temperatures
• Low temperatures
• Lack of electricity
• All of the above

Why is it difficult for many of the world's poor to keep food cool?

• Lack of refrigerators
• Lack of electricity
• Lack of containers
• All of the above

What is the "Pot-in-Pot Cooling System" made of?

• Clay containers
• Metal containers
• Plastic containers
• Glass containers

How does the "Pot-in-Pot Cooling System" work?

• It uses electricity to cool food.
• It uses wet sand and evaporation to cool food.
• It relies on ice to cool food.
• It uses a compressor system to cool food.

What covers the whole cooling system?

• Wet cloth
• Plastic wrap
• Aluminum foil
• None of the above

How does the evaporation process help keep food from spoiling?

• It creates a drop in temperature.
• It kills harmful bacteria.
• It absorbs moisture from the food.
• It removes oxygen from the environment.

How long can some foods be kept fresh using the "Pot-in-Pot Cooling System"?

• Several days
• Several weeks
• Several months
• Indefinitely

Where was the "Pot-in-Pot Cooling System" first invented?

• Southern Nigeria
• Western Nigeria
• Northern Nigeria
• Eastern Nigeria

Who came up with the "Pot-in-Pot Cooling System"?

• A farmer in Nigeria
• A teacher in northern Nigeria
• An engineer in South Africa
• A scientist in Kenya

Who has adopted the "Pot-in-Pot Cooling System"?

• Farmers in Nigeria
• Farmers in other African countries
• Farmers worldwide
• All of the three