7th grade science 2 Flashcards
Science
Process of trying to understand the world
Technology
Use of knowledge gained from scientific thinking and problem-solving to make new products or tools
Constant
Factor that stays the same through all phases off an experiment
Control
Standard used for comparison in an experiment
Dependent variable
Factor that will be measured in an experiment
Hypothesis
Statement that can be tested in an experiment
Independent variable
Single factor in an experiment that the experimenter changes
Inference
Conclusion drawn from an observation
Observation
Bit of information gathered using the senses
Scientific method
Step by step procedures of scientific problem-solving, which can include identifying the problem, forming and testing a hypothesis, analyzing the test results, and drawing conclusions
Condensation
Process in which water vapor changes to a liquid
Conduction
Transfer of energy that occurs when molecules bump into each other
Convection
Transfer of heat by the flow of material
Hydrosphere
All the water on Earth’s surface
Radiation
Energy transfer by waves or rays
Coriolis effect
Causes moving air and water to appear to turn left in the southern hemisphere and turn right in the northern hemisphere due to Earth’s rotation
Jet streams
Narrow bands of strong winds that blow near
the top of the troposphere
Land breeze
Movement of air from land to sea at night, when cooler air about the land moves over the water forcing the heated less dense air above the water to rise
Sea breeze
Movement of air from sea to land during the day when cooler air above the water moves over the land forcing the heated, less dense air above the land to rise
Wind
The movement of air from an area of high pressure to an area of lower pressure
