States of Matter
What are the three main states of matter?
What are solid, liquid, and gas?
What is the change from solid to liquid called?
What is melting?
What happens to molecules when a substance is heated?
What is they move faster and spread apart?
What kind of solid has particles arranged in a regular, repeating pattern?
What is a crystalline solid?
What is power?
What is the rate at which work is done?
Which state has a definite shape and volume?
What is a solid?
What is the change from liquid to gas called?
What is evaporation or boiling?
What happens to molecules when a substance is cooled?
What is they slow down and come closer together?
What kind of solid does not have a regular particle arrangement?
What is an amorphous solid?
James lifts a 10-newton box and moves it 3 meters.
How much work does James do?
Work= force times distance
10 N × 3 m = 30 Joules
Which state takes the shape of its container but has a definite volume?
What is a liquid?
What is the change from gas to liquid called?
What is condensation?
Why do solids keep their shape?
What is because their molecules are tightly packed and vibrate in place?
Give an example of a crystalline solid.
What is salt, sugar, or ice?
When is someone doing work in science?
What is when a force moves an object in the direction of the force?
Which state has neither definite shape nor volume?
What is a gas?
What is the change from liquid to solid called?
What is freezing?
Why do gases spread out quickly?
What is because their molecules are far apart and move freely?
Give an example of an amorphous solid.
What is glass or plastic?
If you push with 10 N of force for 5 meters, how much work is done?
Work=force times distance
What is 50 Joules?
What is surface tension?
What is the inward pull on molecules at the surface of a liquid that causes it to behave like a stretched skin?
What is sublimation?
What is the change from solid directly to gas without becoming liquid first?
What causes a change in the state of matter?
What is a change in temperature or energy?
What’s the main difference between crystalline and amorphous solids?
What is crystalline solids have a set melting point, while amorphous solids melt over a range?
Two people do the same 200 joules of work. One does it in 4 seconds, and the other in 2 seconds.
Who has more power, and how much?
Power = Work ÷ Time
Person 1: 200 ÷ 4 = 50 W
Person 2: 200 ÷ 2 = 100 W
Answer: Person 2, with 100 Watts