Physical/Chemical Changes
Zavin dropped one of his bibles and the page ripped. Did the page change physically or chemically?
Physically. Its still paper, just with a rip in it! You could tape or glue it back together.
Everything is made out of ______________ !!!
MATTER
What are the 3 types of subatomic particles?
PEN
PROTONS
NEUTRONS
ELECTRONS
Why did the molecules (dye) move faster in hotter water in the experiment?
Because molecules move faster as temperature goes up (hotter).
What is the atomic number of Nitrogen?
7
Benita mixes flour, water, eggs, and other ingredients together to make a cake. Did the cake change chemically or physically?
Chemically. The heat from the oven makes the ingredients form a new substance.
It's not reversible! You cant take the flour, water, and eggs out of a baked cake.
What are the 3 states of matter?
Gas
Liquid
Solid
Which subatomic particle is negatively charged?
Electrons
Which experiment helped us learn about thermal energy?
Melting experiment!
What does the kinetic molecular theory teach us?
The kinetic molecular theory explains how particles in different states of matter move in terms of their temperature and kinetic energy.
Physically. It is reversible, she can wash it off!
Are the particles in a solid close together, or far apart?
Close together.
Which subatomic particles live in the nucleus of an atom?
Protons and Neutrons
Which experiment helped us learn about Thermal Energy and Kinetic Molecular Theory?
Water and dye experiment.
The dye (molecules) move FASTER in HOTTER water.
As temperature goes us, molecules move faster.
What does the atomic theory explain to us?
It explains to us how matter is made up and what atoms are mode of.
Ethan burns woods to heat his house. Is the wood changing physically or chemically?
Chemical
ALL changes involving FIRE are CHEMICAL
Are the particles in a gas moving fast or slow?
Very, very fast!
Which subatomic particle orbits the nucleus of an atom?
Electrons
In the melting experiment, what was the control?
The ice cube that we left alone - we did not add anything to the 6th ice cube so we could see how long it takes to melt. This helps us compare our other results.
How many protons, neutrons, and electrons are in Beryllium?
Be
Protons: 4
Electrons: 4
Neutrons: 5
What are 4 of the 5 signs of a chemical change?
Creates gas
Colour change
Temperature change
Forms solids
Has an odour
Tiny particles called ATOMS.
What are protons and neutrons made of?
Quarks
Which experiment helped us learn about chemical changes?
Put these in the correct order (from smallest to largest)
Matter
Atom
Quarks
Neutrons and Protons
Nucleus
Molecule
Quarks -> Neutrons/Protons -> Nucleus -> Atoms
-> Molecule -> Matter