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100
Define convection.
Convection is the transfer of energy via the movement of liquid or gas.
100
_____________ occur because the Earth's axis is _____________. This causes the sun's rays to hit the northern hemisphere at a _______ angle in July resulting in __________________________________________.
Seasons
tilted
steep
increased number of hours of sunlight / longer days / hotter temperatures
100
Why does ice float in water?
Ice is less dense than water.
100
Kinetic energy is measured in _________.
joules
100
What is the cause of convection currents in the atmosphere? Include heat transfer and density in your explanation.
The surface of the Earth is heated by radiation from the sun. As the air above the ground gets warm, the molecules move further apart, and density decreases. As the density decreases, the hot air begins to rise while the cooler more dense air sinks.
200
Define temperature.
Temperature is the average kinetic energy of the particles within an object.
200
What is the Law of Conservation of Energy?
The Law of Conservation of Energy states that energy cannot be created or destroyed; only transformed.
200
Define potential energy.
Potential energy is stored energy.
200
Potential energy is measured in _________.
joules
200
Hot air ______________ because it is ____________ dense.
rises
less
300
Define kinetic energy.
Kinetic energy is the energy of motion.
300
What is the equation to calculate density?
Density = mass / volume
300
Why are we cooler when wearing a white shirt as opposed to a dark one?
White clothing reflects most of the visible wavelengths, absorbing less heat thus making it cooler to wear.
Darker clothing absorbs more wavelengths, absorbing more heat, thus making the clothing warmer to wear.
300
Why is increased CO2 in the atmosphere a problem?
By adding more carbon dioxide to the atmosphere, people are supercharging the natural greenhouse effect, causing global temperatures to rise.
300
Cold air ______________ because it is ______________ dense.
sinks
more
400
_________________ is defined as speed in a given direction.
Velocity
400
________ is the colorless gas in the atmosphere that absorbs the sun's harmful ultraviolet radiation.
Ozone
400
An ____________________ wave is a light wave that does not require a medium to travel through.
electromagnetic
400
Energy stored in the gravitational field is called _____________ ______________ energy.
gravitational potential
400
Atmospheric gases that contribute to the greenhouse effect by absorbing infrared radiation are called _______________ gases.
greenhouse
500
What do you type into a spreadsheet cell to calculate the sum of data?
=SUM( )
500
What do you type into a spreadsheet cell to calculate the average of data?
=AVERAGE( )
500
How much kinetic energy does an object at rest on the floor have?
0 J
500
The mass of an object is 15 kg and the volume is 3 L. Find the density of the object.
D=m/v
15Kg/3L
5Kg/L
500
Draw a spreadsheet table and label a cell, column, and row.
