3. B1. Evaporation
(substance has changed from a liquid to a gas)
What happen during evaporation?
=> the particles on the surface of the liquid gain heat to
escape into the surroundings
4.
5. Paddles of water form on the ground.
When the water in the puddles gains heat from
the surroundings, it changes into a gas called
water vapor.
Evaporation happens at all temperatures.
6. Examples of evaporation
around us every day!
Using hair dryer.
Water from hair gains
heat from hot air and
evaporates to become
water vapor.
Alcohol is rubbed on skin
(injection)
Alcohol gains heat and
evaporates quickly. This
removes heat from our
skin, making skin feel
cooler.
7. Hang wet clothes
Water in clothes
evaporates to become
water vapor. Our clothes
become dry.
Dry fish
Water in fishes
evaporates to become
water vapor. The fish
become dry.
8. What Factors Affect the Rate
of Evaporation?
• Temperature: The greater the temperature of the liquid
and its surroundings, the faster the rate of evaporation.
• Surface area occupied by the liquid: Since evaporation is a
surface phenomenon, the greater the surface area
occupied by the liquid, the quicker it undergoes
evaporation.
• Humidity of the surroundings: The greater the humidity of
the atmosphere surrounding the water, the slower the rate
of evaporation.
• Air circulation or wind speed: The presence of a breeze or
another source of air circulation directly contributes
towards the rate of evaporation.
10. DO NOW:
Give an example of a
Solid
Liquid
Gas
What is a solid, liquid, gas?
What is matter?
11. ●Matter is
anything that
takes up space
and has mass.
●Matter doesn’t
have to be
visible—even air
is matter.
What is
matter?
1
Everything in this photo is
matter.
12. ●All matter is made up of tiny particles, such
as atoms, molecules, or ions.
● Each particle attracts other particles.
● These particles also are constantly moving.
States of
Matter
1
13. ●A material’s state of matter is
determined by:
○Motion of particles
○attraction between particles
17. ●The particles that make up all types of matter
are in constant motion.
● Although you can't see
them, a solid’s particles are
vibrating in place.
Particles in
Motion
1
●These particles do not have enough energy to
move out of their fixed positions.
18.
19. Aim: States of Matter
DO NOW:
Give an example of a
Solid
Liquid
Gas
What are the 4 states of matter?
What 2 things define the state of matter?
21. ● Liquids take the shape of their
containers
● The volume of a liquid always stays
the same
22. ●The particles in a
liquid move more freely
than the particles in a
solid.
●The particles in a
liquid have enough
energy to move out of
their fixed positions but
not enough energy to
move far apart.
Free to
Move
1
23. ●Matter that exists in the gas state but is
generally a liquid or solid at room temperature
is called vapor.
●Water, for example, is a liquid at room
temperature. Thus, water vapor is the term for
the gas state of water.
Vapor
1
30. 1
Section Check
Question 2
Some solids are composed of particles that fall
into a pattern; they have a repeating, three-
dimensional shape. What do you call these
kinds of solids?
Answer
The answer is crystalline solids. A common
example of a crystalline solid is table salt.
31. 1
Section Check
Question 3
Which is composed of particles that have
enough energy to move past each other but not
enough to break away from each other?
A. ice cube
B. lemonade
C. oxygen
D. water vapor
32. 1
Section Check
Answer
The answer is B. Lemonade is a liquid.
Particles in a liquid stay close together
although they are free to move past each other.
