Matter, Atoms and Molecules
The positively charged particle
A proton
Is chopping wood a chemical or physical change?
Physical change
What is one characteristic of Metals?
Good conductors of heat and electricity
Shiny.
Ductile (can be stretched into thin wires)
Malleable (can be pounded into thin sheets)
A chemical property of metal is its reaction with water which results in corrosion.
What is the ultimate source of the energy in our universe?
The Sun
Arrange from largest to smallest: Proton, Electron, Neutron
Neutron, Proton, Electron
Is burning wood a chemical or physical change?
chemical change
What are two characteristics of Non-Metals?
Poor conductors of heat and electricity
Not ductile or malleable
Brittle and break easily
Dull
Many non-metals are gases.
how many meters are 4.5km?
4500m in 4.5km
How do you calculate Atomic Mass?
protons + neutrons
What is the difference between a chemical change and a physical change?
physical changes do not impact the atomic/chemical makeup up of a substance whereas chemical changes do. Chemical changes how the atoms and molecules of a substance are arranged.
True or False: Mercury is a metal?
True
What is the difference between weather and climate?
Weather is the short-term/day-to-day state of the atmosphere. Climate is the state of the atmosphere over longer period of time
What does the Atomic Mass - Atomic Number equal?
the # of neutrons
What common gas is required for a combustion reaction?
Oxygen (O2)
True or False: Carbon is a metal?
False
On Earth, What is the acceleration due to gravity?
9.8 m/s2
Is peanut butter a solid or a liquid?
*depends on explanation
can be considered a soft solid or a harder liquid, depending on temperature, brand, container etc.
Balance the following equation : __ KClO3 → __ KCl + __O2
2 KClO3 → 2 KCl + 3 O2
Name 2 Metalloids
Boron, germanium, silicon, antimony, arsenic, tellurium and pollanium
Define : doppler effect
an increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move toward (or away from) each other