Particle Theory
True or False: Liquid Particles are somewhat close together
True: They aren't as close together as solids, but they float around near each other.
True or False: Ripping paper in half is the sign of a physical change
True: It's still paper, but now there are two peices
A) Light from your computer screen
B) Light from the sun
C) Light from the moon
B) Light from the sun. Light from the moon is actually a reflection and light from the computer is artificial light.
What is an example of reflective light used to keep people safe while driving?
Answers may vary.
True or False: Solid particles take the shape of the container they are in.
False: Solid particles are packed very tightly together and therefore do not take the shape of the container they are in. Liquid particles take the shape of the container they are in.
True or False: Burning a Marshmallow is a physical change
False: Burning a Marshmellow is a chemical change because it produces a burned odour and the colour of the marshmallow changes from white to brown.
What is an example of an opaque object
A) A pair of glasses
B) Ms. Pearl's desk
C) The KABLAB game peice
B) Ms. Pearl's desk. No light can pass through it.
True or False: Processing water bottles at a recycling plant has no negative impact on the environment
False: Melting plastic to create plastic water bottles has a tremendous impact on the environment
False: Although gasoline sounds like "gas", it is not the same thing. Gasoline is a liquid, gas particles are completely different.
True or False: Baking a cake is an example of a physical change
Why does an opaque object cast a shadow?
Because light cannot pass through it.
Creatures who are able to create their own light source often do so for a very specific reason. What is it?
To protect themselves
True or false: Changing temperature will cause changes in a state of matter
True: When we increase heat, a solid becomes a liquid. When we add colder temperatures, a liquid can become a solid.
Answer may vary
A)When light passes through a water glass and a straw looks bent
B) When light bounces off of a flat surface
C)When we see the colours of a rainbow
B) When light bounces off of a flat surface and reflects back at us
Name an example of something transparent you see in nature
Answers may vary
Which is an example of condensation?
A) Boiling water in a pot decreases the amount of water
B)On a hot day, liquid droplets form on the side of my cool glass
C) Neither
B) The reason why it is B is because the cool glass will cool down water vapour in the air, causing water droplets to form
Name one example of a chemical change
Answer may vary
True or false: An object which reflects light such as the moon is also an example of bioluminesence
False: Bioluminescence occurs when a living creature or object can produce it's own light
Name how you can use light and colour to design safety equipment
Answers may vary