When the tiny hole in a pinhole camera is made larger, the image is

A. clearer.
B. brighter but less clear.
C. right-side up.
D. none of the above


Answer: B

Environmental & Atmospheric Sciences

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If an atom has 43 electrons, 56 neutrons, and 43 protons, what is its approximate atomic mass? What is the name of this element?

A. atomic mass, 99 amu; radon B. atomic mass, 99 amu; technetium C. atomic mass, 137 amu; barium D. atomic mass 142 amu; einsteinium

Environmental & Atmospheric Sciences

Which of the following conditions are probably occurring when large raindrops hit the ground?

A. thick cloud overhead and weak updrafts B. thick cloud overhead and strong updrafts C. thin cloud overhead and weak updrafts D. thin cloud overhead and strong updrafts

Environmental & Atmospheric Sciences

Atoms with either a positive or negative charge are called

A. isotopes B. compounds C. ions D. elements

Environmental & Atmospheric Sciences

The Land Evaluation and Site Assessment (LESA) system produces a(n)

A. process model B. index model C. regression model D. binary model

Environmental & Atmospheric Sciences