Cooling Matter Review 94 w

from Let's Do Science 3 – Text Book B

by Regal_Education

Heating Matter

Think Deeply

Where do the water dew droplets on grass come from? What causes them to form?

Have you ever noticed water droplets form on the side of a cold glass of water? The droplets of water form when water vapor in the air cools as it comes in contact with the cold glass. This process of changing from a gas to a liquid is called condensation. Cooling Matter Condensation How does matter change when it is cooled?gal Have you Have the side the of wa of as it pr p Cond Con ed Cooling M oling M ducatione How whe The water droplets that form on a mirror after a hot shower and the dew on grass on a cold morning are other examples of condensation.

Freezing

What change will occur when water is placed in a freezer?

Pour some water into an ice tray and , place it in a freezer. After a few hours, you’ll notice that the liquid water has changed into solid ice. This process of changing from a liquid to a solid is called freezing. Chocolate melts when it is heated in a pan. The liquid chocolate flows and can be poured into molds. When the liquid chocolate freezes, it becomes a solid with its own rigid shape. Activity 10.5AB a duca

Science Words

1. What is mass and how can it be measured? 2. How can you measure the volume of a liquid? 1. is the process of changing from a solid to a liquid. 2. is the amount of space matter takes up. 3. is the process of changing from a liquid to a gas. 4. matter has a fixed volume, but can change in shape. 5. A can change in both shape and volume. 6. How much matter an object has is its . 7. is anything that has mass and volume. 8. matter has a fixed shape and volume. 9. Water in the form of a gas is called . 10. The process of changing from a gas to a liquid is called . 11. The process of changing from a liquid to a solid is called . Use the words to complete the sentences. matter mass volume solid liquid gas melting evaporation water vapor condensation freezing Review Reg What is mass How gal er has m of a gas is of changing s of changin ew eg education solid to a liqu takes u om a liqu me, but ca th shape an has is its d at has ma ti 94

3. Create a chart to compare the properties of solids, liquids and gases. Provide an example of each state of matter. 4. Describe what happens to the volume of air in a balloon when the balloon bursts. 5. Describe the processes taking place in each picture. (a) (b) (c) c) ducation en t re.

(d) 6. What change takes place when melted chocolate is cooled? 7. What change takes place when butter is heated in a pan? 8. What change takes place when water vapor cools on a cold glass? Reg What chang What

In this chapter you will ... • describe the ways in which forces affect motion. • distinguish and name contact and non-contact forces. • determine cause and effect relationships of electric and magnetic interactions between two objects not in contact with each other. • define a simple problem that can be solved by applying knowledge of magnets. • provide evidence of the effects of balanced and unbalanced forces on the motion of an object. • use knowledge of forces and motion to predict motion. How can you tell that an object is moving? What causes things to move? 11 Interactions and Forces al l that an at causes thi educatio forces f electric an ntact with e lved by ap of balanc nd motion n