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24 Cards in this Set
- Front
- Back
In order to make observatons, an observer must use_____________________. |
The senses |
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A pebble found in a dry field has round edges. A professor says that the pebble has been rolled over and over in a flowing stream. His comment can best be classified as ________________________. |
An inference |
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The general purpose of a scientific system of classification is to ________________________. |
organize for easier study |
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Which property was probably used to classify the substances below? A B C Water Aluminum Water Vapor Gasoline Ice Air Alcohol Iron Oxygen |
Physical State (phase) |
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Which descriptive term illustrates an inference? Transparent, younger, smooth, bitter |
Younger |
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A student recorded the times of three successive high tides at on location as: 9:12 am, 9:38 pm, 10:04 am What is the approximate time of the next tide? |
10:30 pm |
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Which word does not belong? Gram, centimeter, meter, pound |
pound |
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Density is usually expressed in___________. |
g/cc cc= cubic cm |
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The three basic dimensional qualities are: |
time, length, and mass |
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Two measurements that are often used interchangeably are: |
weight and mass |
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Only ____________ of an ice cube is above water. |
1/10 |
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An object with the same density as water would ___________________________. |
sit in the center of the liquid
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At which temperature does water have its greatest density? |
4 °C (liquid form) |
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What is the density of the object? Mass: 120 g Volume: 4 cm x 3 cm x 5 cm = ? cc |
2.0 g/cc |
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If an object were cut in half, the density would ______________________. |
Remain the same |
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As a volume of air expands due to heating, the density of the air will ______________________. |
decrease |
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At which phase (state) do most earth materials have their highest density? |
solid |
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Calculate the density of the irregular object: Volume: 3.0 mL Mass: 12 g |
4.0 g/mL |
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What always happens when a change occurs? |
The properties of the system are altered |
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The boundary between two regions of change is called a(n) _____________________. |
interface |
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In a static change, as the independent variable ___________, the dependent variable ______________________. |
increases, remains the same. |
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In a cyclic change, as there is a __________________. |
repeating pattern |
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In an indirect or inverse change, as the independent variable __________, the dependent variable _________. |
Increases, decreases |
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In a direct change, both variables __________. |
Increase |