Chemistry
What are the 3 principle subatomic particles of an atom with their charges?
Proton-positive, Neutron-neutral, Electron-negative
A wave has a frequency of 50 Hz and a wavelength of 10 m. What is the speed of the wave?
500 m/s
These are cells that do not have a nucleus or other membrane-bound organelles.
Prokaryotic
What is the imaginary line that separates the Earth into the Northern and Southern Hemispheres called?
Equator
What is a homogeneous mixture?
A mixture that looks the same throughout.
What is the law of conservation of mass?
States that matter can neither be created or destroyed.
A wave has a frequency of 5 Hz and a speed of 25 m/s. What is the wavelength of the wave?
5 m
What are the 3 main parts of the Cell Theory?
1. The Cell is the basic unit of life. 2. All cells come from preexisting cells. 3. All organisms are made up of 1 or more cells.
This is a pattern of stars in the sky that represents a person, place, or thing.
Constellations
What is the difference between a physical change and a chemical change?
A physical change only results in the same substance changing shape, color, state of matter, etc while a chemical change results in a new substance being formed.
How many protons, neutrons, and electrons does iridium have?
77 Protons, 115 Neutrons, 77 Electrons
A wave with a frequency of 14 Hz has a wavelength of 3 meters. At what speed will this wave travel?
42 m/s
What are the two types of ER?
Smooth ER and Rough ER
This occurs when the moon comes between the sun and the Earth.
Solar eclipse
Of the 3 common states of matter, which state has the highest energy?
Gas
How many valence electrons does As have?
5
Radio waves travel at a speed of 300,000,000 m/s. WFNX broadcasts radio waves at a frequency of 101,700,000 Hz. What is the wavelength of WFNX's radio waves?
2.95 m
These are the openings in leaves of a plant that allow for gas and water exchange.
Stomata
When we are enjoying a cold, wintery Christmas eve in the Northern Hemisphere, what are the Aussies enjoying on Christmas eve.
A hot summer day.
What is the balanced chemical equation for the following reaction: sulfur dioxide reacts with oxygen gas and water to form sulfuric acid (H2SO4)?
2 SO2 + O2 + 2 H2O ---> H2SO4
What is the chemical name for Fe2O3?
iron (III) oxide
A 10.0 m wire is hung from a high ceiling and held tightly below by a large mass. Standing waves are created in the wire by air currents that pass over the wire. setting it in motion. If the speed of the standing wave is 335 m/s and its frequency is 67 Hz, what is its wavelength?
5.0 m
Where do photosynthesis and cellular respiration take place respectively?
Chloroplasts and mitochondria
What are the three movements that Earth makes?
Rotation on its axis, revolution around the sound, and precession on its axis.
List and describe the 3 main types of chemical bonds.
Ionic bonds - Between a metal and a nonmetal; covalent bonds - between two nonmetals; metallic bonds - between two metals