Physical Changes
Chemical Changes
Nuclear Changes
Physical vs Chemical vs Nuclear
Vocabulary
100
What is a substance?
a single kind of matter that is pure and possesses a specific set of properties (atoms, elements, molecules, and compounds) The ingredients in the cake of life!
100
Can a chemical change be reversed?
No, not usually.
You cannot make burnt bread unburnt.
100
What is an event that greatly alters the nucleus of an atom?
a nuclear change
bonus points: what is found inside the nucleus of an atom?
Fusion vs Fission: https://www.youtube.com/watch?v=4JO-XIWxqdo
100
Is melting water a physical change or a chemical change?
Physical change (it is still water just in a different form, and it can be undone!)
100
What is the difference between a mixture and a solution?
a mixture is a combination of two or more substances that can be physically separated
a solution is a TYPE of mixture of two or more substances where the substances are evenly distributed.
200
What is an example of a physical property?
color, smell, taste
200
What is an event that rearranges chemical bonds and forms one or more new substances with different properties?
a chemical change
200
Name 4 parts of an atom
electron, neutron, proton, nucleus
200
When wood is put into the fire and burned it turns into ash. Is this a physical change or a chemical change?
Chemical! The wood changed into something new, ash, and it cannot be undone.
200
What does soluble mean?
Able to be dissolved in water! (like a sugar cube, water-based paint, etc)
300
How would you physically change a block of wood?
You could carve it into a fox (it's still made out of wood, you just changed the shape. So that was a physical change)
300
What is a chemical characteristic that describes when or how a substance will interact with other substances?
a chemical property
300
True or False: nuclear fusion occurs when 2 nuclei of small atoms are combined into one large atom and a huge amount of energy is released
True!
Fusion means to combine or fuse
300
A chemical change only affects the electrons of an atom. What type of change affects the bond that holds the protons and neutrons of an atom together?
a nuclear change (because the protons and neutrons are in the nucleus of the atom!)
300
Give an example of something that is insoluble.
an apple seed, a piece of wood, a lego, etc.
400
How would you physically change a banana?
Cut it up! Put it in a fruit salad! (It's still a banana, it just changed shape and was put into a container)
400
In a chemical bond what is being affected in the atom?
400
True or false: nuclear fission is when electrons of an atom are heated
False! Nuclear fission occurs when the nucleus of an atom is hit with a neutron from another atom and the nucleus splits apart
Fission means to split
400
Which one is a physical change?
1. dough turning into cookies after baking in the oven
OR
2. a glass falling and breaking
2!
bonus: why is this a physical change and not a chemical one?
400
What does it mean if something is combustible?
it can be burned
500
What is an event that alters the form or size of matter but does not change the type of matter?
A physical change!
500
Give an example of a chemical change.
wood turning to ash, the contents of fireworks exploding to create light, baking a cake, etc.
500
What happens when a nuclear change occurs and breaks apart the nucleus of an atom?
a new element is formed!
bonus: name an element in the periodic table
500
a. electron
b. neutron
c. proton
500
What is a chemical bond?
the force of attraction that holds atoms together within a molecule
(this is from the positive and negative attraction of the electrons and the protons in the atom, like a magnet!)