# data[].attributes.headline
Dewpoint & Relative Humidity: Background

# data[].attributes.subject
Dewpoint & Relative Humidity: Background

# data[].attributes.body
Dewpoint and Relative humidity are important weather variables that help meteorologists predict the likelihood of rain. Both are measured using an instrument called a sling psychrometer, or hygrometer.

Copy the following statement into your notebook:
Precipitation becomes more likely as air temperature decreases and relative humidity increases!

Image from USA Today,  05/20/2005 . http://usatoday30.usatoday.com/weather/wsling.htm

# data[].attributes.headline
Weather Instruments & Variables Video Clip

# data[].attributes.subject
Weather Instruments & Variables Video Clip

# data[].attributes.body
Watch the video clip below, then write a 4-5 sentence reflection in your notebook about what you learned while watching

# data[].attributes.attachment_link.description
Here are words that will be helpful to students doing a hands-on science inquiry in which they will make simple barometers and use them and other instruments to collect weather data. They will relate their observations to the Essential Question: What are some instruments used to collect weather data and how can the data be used to predict weather?

# data[].attributes.body
Navigate to the following sectionsin the text (bolded) to answer the questions

What is Weather?
1. Which 4 factors combine to make weather?
2. Predict the "driving force" that affects all weather on Earth (HINT: the answer is in paragraph 1!)
3. List 3 examples of weather?
4. What is the weight of the air called? What is another name for this? (HINT: look at the vocabulary you copied into your notebook!)
5. Compare the weight and motion of warm and cold air
6. What causes wind?
7. Explain how precipitation forms in the atmosphere

# data[].attributes.body
Click on the icon below to access Power Knowledge Earth-Space Science. Login using syrsls as the username and syrsls as the password.
Answer the E-text questions in your notebook as you read!

# data[].attributes.attachment_link.readable_text
Login

Your institution must be configured to use single sign-on with Google.Please contact customer service for more information.
Do you want to log in with your library card?
Your IP address is: 54.204.20.249

If you are a PowerKnowledge Earth & Space Science subscriber and are unable to access the site, please contact your system administrator or contact PowerKnowledge Earth & Space Science Customer Care via email or phone at (877) 381-6649.

# data[].attributes.attachment_link.description
Your institution must be configured to use single sign-on with Google.Please contact customer service for more information. Do you want to log in with your library card? Your IP address is: 54.204.20.249 If you are a PowerKnowledge Earth & Space Science subscriber and are unable to access the site, please contact your system administrator or contact PowerKnowledge Earth & Space Science Customer Care via email or phone at (877) 381-6649.

# data[].attributes.body
Copy the entire definition from each slide into your notebook. Click on each slide to enlarge.