Matter
Can we see all matter? (paragraph 1) Are there examples?
We can't see some kinds of matter, like gases. But all gases still take up space. The gas we call air is a good example.
What is heat energy? How does the sun energize the Earth? (paragraph 2)
Energy comes in different forms. Heat energy is one kind of energy. Energy from the sun heats everything on Earth. It heats the air in the sky and the water in the ocean.
What happens when you let the air out of a balloon? (paragraph 1)
When you let air out of a balloon, the balloon gets smaller. The air leaves the balloon and goes into the room.
Why do we need thermometers? (paragraph 4)
You need a thermometer to measure the temperature of the air. Some have special liquid inside. When heat energy is added to the liquid, it spreads out. It uses more space. We read the numbers to know how much heat energy is in the air.
What happens when you blow into a balloon? Why does this happen? (paragraph 1)
When you blow into a balloon, the balloon gets bigger. This is because it fills with air, and air takes up space.
What can we learn when we measure temperature? (paragraph 3)
When we measure temperature of air, we learn how to the air is. Remember, air is matter, and matter has heat energy.
What are some examples of matter? What is it? (paragraph 1)
rain, snow, oceans, air, clouds. Anything that takes up space is matter.
How are matter and heat energy connected? What is temperature? (paragraph 3)
All matter has heat energy. Some matter has more heat energy than other matter. We use the word temperature to tell how hot matter is.