Energy
Thermo-dynamics
Space
Weather And Atmosphere
Random
100
Define Energy
The ability to Work
100
Define Matter
Any substance that has mass and takes up space
100
What a causes Gravity?
Mass. Gravity is a distortion of time and space caused by an objects mass. All objects with mass have gravity
100
What forces must be balanced in order for a planet to retain an atmosphere?
The planet needs to have sufficient gravity and its surface cannot be too hot.
100
how many meters are 6.2km?
6200m in 4.5km
200
What is the ultimate source of energy on Earth?
The Sun
200
Define Thermal Energy
Energy created by the movement of particles (atoms), their movement produces heat
200
What two forces must be balanced for a stable orbit to occur?
Gravity and Velocity. There's a balance between one bodies gravity and another bodies velocity.
200
Compare and Contrast : Weather vs Climate
Weather - the daily state of the atmosphere
Climate - the average weather conditions in an area over a long period of time.
200
What is the state bird of California?
California Quail
300
What is the relationship between Kinetic Energy and Potential Energy?
They are inversely proportional (as on goes up the other goes down)
300
What are the three main ways heat is transferred in our universe?
Conduction, Convection and Radiation
300
What are the three criteria for an object to be considered a planet as set by the International Astronomical Union?
It is in orbit around the Sun.
It has sufficient mass to assume hydrostatic equilibrium (a nearly round shape).
It has "cleared the neighborhood" around its orbit.
300
How does warmer air behave?
When air is warmed, its particles spread out and rise up creating lower pressure systems
300
Where is DNA stored in Prokaryotic cells
The Cytoplasm
400
True or False : Energy conversions (changing from one form to another) can be 100% efficient under the right conditions
False: No Energy conversion is 100% efficient
400
At what temperature does water boil? (bonus points : give the temperature in each of the three major scales)
212°F
100 °C
373K
400
Why is the Sun at the Center of the milky way? Why do planets orbit the Sun?
It contains the most mass and therefore has the strongest gravity. The planets orbit because they have enough velocity to not get sucked in but aren't fast enough to fly away.
400
What causes wind?
Sunden changes in Air Pressure. High pressure systems move to areas of lower pressure and this movement of air drives air currents.
400
If the acceleration due to gravity on mars is 3.72 m/s2
what would be the potential energy of a 4kg object be if it were 250m in the air?
PE = mass x gravity x height
= 4kg x 3.72 m/s2 x 250m
= 3720 J
500
Calculate the potential energy of an object with a mass of 2kg and a height of 5 m
PE = mgh
PE =2 x 9.8 x 5
PE = 98 j
500
Convert 37°C to Kelvin
°C -> K, add (+) 273
37 + 273 = 310K
500
Describe the difference Mass and Weight
Mass is the amount of matter an object contains (same anywhere in the universe)
Weight is the force of gravity on an object (changes from planet to planet)
500
How does the Sun's radiation create weather on Earth?
*depends on quality of response
The Suns radiation heats Earth's surface unevenly (due to Earth's axis and rotation.) Some parts become hotter than others, which create convection currents and pressure systems. As these systems move and interact with one another, they bring material like air and water with them. This movement of material create the conditions for weather, like humidity wind and precipitation.
500
What is a preposition?
preposition is a word (like in, on, at, to, from, with) that links a noun or pronoun to other words in a sentence, showing a relationship of place, time, direction, or logic