You might want to know how cold it is. You may need to know how fast the wind is blowing. Maybe it rained last night? Do you know how much? Does it feel humid to you? You have heard all these questions before. To answer these questions, we need data. That data comes from special tools. These tools collect data about the weather. You can see some of the common tools listed below: A thermometer measures temperature. An anemometer measures wind speed. A rain gauge measures the amount of rain. A hygrometer measures humidity. A wind vane shows wind direction. A snow gauge measures the amount of snow.

Question: "What tools would you use to measure the amount of rain and wind speed?"

Response: "Hygrometer"

A: no

Pester came running into the room. He came to a fast stop when he saw the dog. He'd seen a dog before, every cat has, and he used to live with a black dog named Henry, but he'd never seen a brown one before. It seemed strange to him, but not as strange as it was to see Linda the brown chicken in the living room last spring. That still confused him. He thought he liked this dog, not because of the color, but because it was small. And it was so hairy. It was a like a mop that could run around. He jumped on his favorite chair and looked down as Maggie ran under it. She was kind of cute for a dog, Pester thought to himself. He layed down on the chair and pawed at her as she ran in a circle under it. He tapped her ears as she went by, and waved his tail like a flag trying to get her attention. After a little more of this, Pester curled up in a ball on the chair and took a nap.

Question: "Why did Pester think of a mop when he saw the dog?"

Response: "It was so hairy"

A: yes

What if two children push a swing at the same time? Would the swing go higher? Yes, together their force would be more. It is common for forces to be combined. Most objects on Earth have at least two forces acting on them. Do you know what one of them is? Of course, that force is gravity. How many forces do you have on you right now? Gravity pulls you down toward the center of Earth. Your legs exert a downward force. They hold you up against the pull of gravity. Consider the example in Figure 1.3. A book is resting on a table. Gravity pulls the book downward. It has a force of 20 newtons. At the same time, the table pushes the book upward. Its force is also 20 newtons. The table opposes the pull of gravity.

Question: "How would gravity affect a book resting on a table/"

Response: "The book would be in the air"

A:
no