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All Subject Study Guide for 7th Grade Comprehinsive (Physics, biology, chemistry, math, english, and spanish) Exam| Actual Questions and Answers 100% Correct| Latest Update
Homeostasis ✔✔When organisms maintain a stable internal environment even
when external conditions change
Metabolism ✔✔Combination of chemical reactions taking place within an
organism
Stimulus ✔✔A signal to which an organism responds
Biosphere ✔✔Means "living planet"
Robert Hooke ✔✔Scientist who looked at cork through a microscope and gave
the name to cells
Light Microscope ✔✔A type of microscope
Can magnify 1000x
Not as strong as other microscopes
Uses light
Scanning Electron Microscope ✔✔A type of microscope
Can magnify 100,000x
Uses electron beams focused by magnetic fields
Used to see surface of objects
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