Term
| What is the difference between a hypothesis and a theory? |
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Definition
| A hypothesis is an idea that is proposed based upon a set of observations that can be tested.
A theory is a hypothesis that has been tested numerous times and has not yet been proven incorrect. |
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Term
| Describe the different variables that are used in an experiment. |
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Definition
| Control: The "base variable" of the experiment that is not changed in order to provide an idea of how something reacts to its natural environment without interference.
Manipulated Variable: The "independent variable" that is changed in order to see how the responding variable will react.
Responding variable: The "dependent variable" that reacts to the manipulated variable. |
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Term
| Which variable changes in an experiment?
A. Manipulated
B. Control
C. Responding |
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Definition
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Term
| What is the difference between qualitative and quantitative data? |
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Definition
| Qualitative data describes characteristics of a subject (ex: color, shape, taste) while quantitative data describes measurements of a subject (ex: volume, length, weight). |
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Term
| What are the 8 characteristics of living things? |
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Definition
| Living things...
-are made of cells.
-reproduce.
-are based on a universal genetic code. (have DNA)
-grow and develop.
-obtain energy.
-maintain homeostasis.
-respond to their environment.
-evolve. |
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Term
| What is the goal of science? |
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Definition
| The goal of science is to investigate and understand the natural world, to explain events in the natural world, and to use those explanations to make useful predictions. |
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Term
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Definition
| set of cemical reactions through which an organism builds up or breaks down materials as it carries out its life processes |
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Term
| What are the 6 kingdoms of living things? |
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Definition
| Eubacteria, Achaebacteria, Protista, Fungi, Plantae, and Animalia |
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Term
| Name the three domains of classification. |
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Definition
| 1. Eukarya Consists of protists, fungi, plants, and animals.
2. Bacteria Corresponds to the kingdom Eubacteria.
3. Archaea Corresponds to the kindgdom Archaebacteria. |
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Term
| The original color of Earth's sky was probably...
A. The same color that it is today.
B. Pinkish-Orange
C. Bluish-Purple |
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Definition
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Term
| What did Earth's original atmosphere probably contain? |
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Definition
| Hydrogen cyanide, hydrogen sulfide, carbon dioxide, carbon monoxide, nitrogen, and water. |
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Term
| Would we have been able to breathe in the things in Earth's original atmosphere? |
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Definition
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Term
| Did oceans exist at the beginning of Earth's existence? |
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Definition
| Probably not, as the surface was extremely hot. |
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Term
| What color were Earth's original oceans? |
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Definition
| Brown, because of the iron they contained. |
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Term
| Why did the oceans turn bluish-green when oxygen came to Earth? |
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Definition
| The oxygen rusted the iron in the ocean, and the rust fell to the ocean floor, causing the brownish color from the iron to disappear. |
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Term
| Did concentrations of methane and hydrogen sulfide begin to increase or decrease when oxygen began accumulating in the atmosphere? |
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Definition
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Term
| When and why did the ozone layer form? |
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Definition
| When oxygen gas began to accumulate in the atmosphere, the oxygen particles joined together to form O3 and began to form the ozone layer. |
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Term
| Why did the color of the sky change? |
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Definition
| When oxygen came into the Earth's atmosphere, it changed the color of the sky to blue. |
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Term
| True/False: Some (if not most) of the organisms on Earth died when oxygen came into the atmosphere because it was toxic to them. |
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Definition
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