Living Environment | Total Course Flashcards
Pass the regents. (26 cards)
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Observation
What is seen or measured.
Inference
A conclusion based on observation or evidence.
Hypothesis
A prediction based on available evidence. States cause and effect. (If-Then)
Control group
“Normal” group
Experimental group
Group being tested, “Test Group” (recieves treatment)
Placebo
A fake (like Kieran)
Independent Variable - X Axis
Variable being tested (new drug, new fertilizer)
Dependent Variable - Y Axis
variable measured at the end of an experiments, results
Characteristics of a good experiment
Large sample size
Can be repeated the same way, same results
The four biomolecules
Carbs
Proteins
Lipids
Nucleic Acids
Organic Compounds
Carbon & Hydrogen
larger than inorganic molecules
Carbs
Made from simple sugars
Supplies energy
Lipids
Fats, oils
Stores energy
Proteins
Composed of Amino Acids
Makes most of your body’s essential chemicals
Shape determines job
Four jobs of proteins
Enzymes
Receptor molecules
Antibodies
Hormones
Enzyme
Catalyst made from protein - affects speed of chemical reactions.
Enzymes only fit one type of molecule ONLY.
pH
0-6 acidic
8-14 base
7 - neutral (water)
Homeostasis/Dynamic Equilibrium
Organisms balanced state
Some basic life functions include:
Nutrition
Excretion
Respiration
Growth
Diffusion
Movement of molecules from high to low concentrations. (No energy)
Active Transport
Movement of molecules from low to high concentrations. (Uses energy)
Osmosis
Diffusion of water (in or out of cell)
Swelling and shrivelling
Water diffuses into cell ➡ Cell swells, larger
Water diffuses out of cell ➡ Shrivels up
