Which if the following is (are) a way that air temperature can affect air pressure? Select all answers that apply.
a. Surface cooling causes air to become denser.
b. Surface heating cause air to become less dense.
c. Surface heating causes air to become denser.
d. Surface cooling cause air to retain starting density.
a. Surface cooling causes air to become denser.
b. Surface heating cause air to become less dense.
d. Surface cooling cause air to retain starting density
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To move a crate across your basement floor, friction will be less if you
A. push with a stick at a downward angle. B. pull with a rope making an upward angle. C. both the same D. not enough information
A chemical equation for the combustion of propane, C3H8, is shown below. Through this reaction, is the carbon oxidized or reduced? C3H8 + 5 O2 ? 3 CO2 + 4 H2O
A. The carbon is oxidized. B. Some of the carbons are oxidized, while others are reduced. C. The carbon is reduced. D. The carbon is neither oxidized nor reduced.
What is the Holocene epoch?
What will be an ideal response?
Nitrogen fixation is a process that makes nitrogen available to plants and is carried out by ________
A) volcanic eruptions B) nitrogen gas dissolving in fresh water and in the ocean C) bacteria D) plants during photosynthesis