Drinking Boiling Water

10/10/2020 5:18:00 PM
Boiling Water. Image: sciencing.com

Do you know?

  • The boiling temperature of water varies according to the outside pressure.
  • Different substances have different boiling points.

Let's explore more in the following passage!

 

FACT: Adding a water-soluble substance, such as salt or sugar increases the boiling point.

Image: unocasa.com

Listen and choose the correct answer.

  • What is the temperature at which water boils at sea level?
  • At sea level, water boils at ____ temperature ____ on the top of Mount Everest. 

At sea level, water boils at ______.

  • 100°F
  • 156°F
  • 212°F

At sea level, water boils at ____ temperature ____ on the top of Mount Everest. 

  • a lower - than
  • a higher - than
  • the same - as

Complete the text you are listening to by dragging the correct word to each blank.

You are at . You can't drink boiling water. It is too hot. What is the temperature at which water ? At sea level, water boils at 212°F.

What if you went to the top of Mount Everest? You could drink boiling water! How can this be? Water boils at a lower on the top of Mount Everest. It boils at 156°F.

Why isn't the boiling temperature the same? Mount Everest is very high.

There is less air. It is easier for water to boil because there is less . At sea level, there is more air. The air pressure is greater. Water has to be hotter to boil when there is more air pressure.

Read and answer the following questions.

Mount Everest. Image: britannica.com

You are at sea level. You can't drink boiling water. It is too hot. What is the temperature at which water boils? At sea level, water boils at 212°F.

What if you went to the top of Mount Everest? You could drink boiling water! How can this be? Water boils at a lower temperature on the top of Mount Everest. It boils at 156°F.

Why isn't the boiling temperature the same? Mount Everest is very high.

There is less air. It is easier for water to boil because there is less air pressure. At sea level, there is more air. The air pressure is greater. Water has to be hotter to boil when there is more air pressure.

Where would it take a hard-boiled egg the longest to cook?
  • at sea level
  • the top of Mount Everest
  • the bottom of Mount Everest
  • the middle of Mount Everest
The story does NOT tell you _____
  • the air temperature at sea level.
  • where the air pressure is greater.
  • the temperature water boils at sea level.
  • the temperature water boils at the top of Mount Everest.
"Sea level" is to "low" as _____
  • "mountaintop" is to "hot".
  • "mountaintop" is to "boil".
  • "mountaintop" is to "same".
  • "mountaintop" is to "high".

Put the right word in each blank. The sentences are from the text.

  1. At , water boils at 212°F.
  2. What is the temperature at which water ?
  3. Water boils at a lower on the top of Mount Everest.
  4. It is easier for water to boil because there is less . 

Put the right word in each blank. These are new sentences for words in the text.

  1. The soup should gently for about half an hour before being served.
  2. The equipment records minute changes in .
  3. The ranges from zero to ten degrees.
  4. The village is about 1500 meters above .