Science MPT Quarter 4 Practice

Flashcard
•
English
•
7th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What are convection currents?
Back
Convection currents are the movement of fluid caused by the heating and cooling of the fluid. As a fluid is heated, its molecules spread out, making it less dense and causing it to rise, while cooler, denser fluid sinks, creating a continuous circulation pattern.
2.
FLASHCARD QUESTION
Front
Why do high pressure systems move towards low pressure systems?
Back
High pressure systems push harder against low pressure systems due to differences in pressure. This movement is driven by the natural tendency of fluids to move from areas of high pressure to areas of low pressure.
3.
FLASHCARD QUESTION
Front
What is a chemical change?
Back
A chemical change is a process where substances combine or break apart to form new substances with different properties. An example is a copper penny turning greenish due to oxidation.
4.
FLASHCARD QUESTION
Front
What is a physical change?
Back
A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include changes in state, such as melting or freezing.
5.
FLASHCARD QUESTION
Front
How many areas of low pressure are typically found on a weather map?
Back
The number of low pressure areas can vary, but in the context of the provided question, there are 9 areas of low pressure.
6.
FLASHCARD QUESTION
Front
How do mountain ranges affect climate?
Back
Mountain ranges can affect climate by forcing air masses upwards, which generally cools the air and can lead to precipitation on the windward side.
7.
FLASHCARD QUESTION
Front
What is density?
Back
Density is the mass of a substance divided by its volume. It determines whether an object will float or sink in a fluid.
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