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33 Cards in this Set
- Front
- Back
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Describe the parts of the scientific method ( observation, question, hypothesis, experiment, control group, variable, conclusion) |
Observation: piece of the natural world is absurd to work in a certain way Question: question the "what," "why," and "how" question Hypothesis: a testable explanation for an observed phenomenon Experiments: controlled test of the question at hand Control group: no treatment is given to the control group while the experimental group is changed.
Variable: an adjustable condition in an experiment
Conclusion: are made following from the experiment. |
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Describe what it means for a hypothesis to be testable and falsifiable |
Because you can't prove something is true you can only prove that you can't prove it is false. |
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Distinguish between an experimental group and a control group |
An experimental group in an experiment that receives the variable being tested |
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Explain why control groups are used in experiments |
A control group gives reliable Baseline data to compare their results |
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Describe what theory means in science |
General set of principles supported by evidence that explains some aspect of nature |
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List criteria for deciding whether something is alive |
Energy, respond to their environment, homeostasis, DNA, reproduce, composed of one cell, evolution |
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Place in order the various levels of organization in living things |
Atom, molecule, organelle, cell, tissue, organ, organ system, organism, population, community, ecosystem and biosphere |
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Distinguish among protons, neutrons and electrons |
Proton has a positive charge Electron has a negative charge Neutron has no charge |
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Covalent bond |
Atoms share one or more electrons |
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Molecule |
Entity of a defined number of atoms covalently bonded together |
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Ionic bonding |
A chemical bonding in which two or more ions are painted by virtue of their opposite charge |
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Distinguish acids and bases |
Acid is any substance that yields hydrogen ion when put in an aqueous solution Base is any substance that accepts hydrogen ions in solution |
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Monomer |
A small molecule that can be combined with other similar Molecules to make a polymer |
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Polymer |
A large molecule Make up of many similar subunits |
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Distinguish between the nucleus of an atom and the nucleus of a cell |
The atom nucleus contains protons and neutrons The cell of a nucleus houses DNA |
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Explain why carbon is more versatile than other elements when building molecules |
Carbon has four electrons in outer shell so they can make up to four bonds. The bonds are covalent and stable |
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Starch |
Main form of energy storage in plants |
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Glycogen |
Used for primarily short-term storage in animals |
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Cellulose |
Functions to provide structure to plants |
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Chitin |
Functions in external skeleton of arthropods |
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Denature |
Loss of protein shape as a result of heat, acidity or other effects |
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Distinguish between saturated and unsaturated fats |
Saturated has no double bonds |
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Describe what ribosome do |
A machine that carries the instructions for mRNA |
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Osmosis |
Net movement of water across a semi-permeable membrane from low concentration to greater concentration |
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Phospholipid Bilayer |
Hydrophilic phosphate head and hydrophobic fatty acid |
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Nuclear envelope |
Double membrane that lines the nucleus |
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Describe differences and similarities between prokatyotic and eukaryotic |
Prokatyotic is smaller, has no nucleus, few species organelles and mostly single celled. Eukaryotic is larger, contains DNA, many different organelles, and usually multicellular. |
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Compare and contrast plant and animal cells |
Animal cell does not have Chloroplasts, Central vacuole and tonoplast, cell wall and plasmodesmata Plants cells does not have lysosomes, centrioles and flagella |
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Rough Endoplasmic Reticulum |
Network of membranes that aid in the processing of protein in eukaryotic cells |
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Smooth Endoplasmic Reticulum |
No ribosomone attach, lipid synthesis, and Detox center |
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Name three functions of membrane proteins |
Structural protein,recognition protein, and receptor protein. |
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Recognize when diffusion is likely to occur |
When molecules move from high concentration to a lower concentration |
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Passive vs. Active transport |
Passive: movement down the concentration gradient requiring no energy Active : movement against the concentration gradient with the use of ATP |
