States of Matter
Physical Changes
Chemical Reactions
Energy
Light
100
Can you draw a particle model on your whiteboard for a solid, liquid, and gas
100
Are physical changes reversible or irreversible?
Reversible
100
Are chemical changes reversible or irreversible?
Why or why not?
They are irreversible because it has made something new and cannot be changed back to it's original state
100
How are shadows formed?
When light is blocked by an object, it creates a shadow.
100
How does light travel?
In a straight line
200
What are the 3 states of matter
solid, liquid, gas
200
When liquid changes from a liquid to a gas what is this process called?
evaporation
200
What are some examples of chemical changes?
cooking an egg, baking a cake, metal rusting, banana browning, wood in a fire
200
Is this item opaque, transparent, or translucent
opaque, light cannot go through it
200
Some materials block light.
Can you name each one in order?
Which one can help protect our eyes from the sun?
1. transparent
2. translucent
3. opaque
Translucent materials can protect our eyes
300
Describe the state of matter?
What is the name of that change?
Is it being heated or cooled?
- solid to a liquid
- melting
- heated
300
When the temperature increases a solid can change into a liquid. What is this called?
melting
300
Butter in a pan is a chemical change.
False, it is a physical change
300
What kind of output energy happens?
Input: Electrical Output: ______,______
light, sound, and wasted heat energy
300
Name some artificial light sources.
lamp, flashlight, candle,
400
Describe the state of matter?
What is the name of that change?
Is it being heated or cooled?
-liquid to gas
- evaporation
- heated
400
What is the reverse of melting? (when the temperature is lowered)
freezing or solidifying
400
Rusting metal is a chemical change.
True
400
Describe the wasted output energy in this picture
Input: potential energy stores in fuel
Output: movement Wasted: _____?
sound and heat
400
Point how you would draw the arrows.
How does the light enter our eyes?
Light from a light sources shines on an object, bounces (reflects) off them and enters our eyes.
500
Describe the state of matter?
What is the name of that change?
Is it being heated or cooled?
Pond
-liquid to solid
- freezing/solidifying
- cooled
500
What is the reverse for evaporation?
(the temperature is lowered/goes down)
Condensation
500
What are some things used for evidence that a new product was made?
bubbles (gas), the smell can be different, change of color
500
Describe the type of energy that happens on a roller coaster?
kinetic energy (moving down)
potential energy (waiting at the top)
500
Point & name the four parts of the eye. What is so special about the black part of the eye?
-eyelid, eyelash, iris, pupil
-The black spot is the pupil where light enters our eye, it is a hole.