A balanced mixture of sand, silt, and clay. ๆฒๅญใๆทคๆณฅๅ็ฒๅ็ๅ่กกๆททๅ็ฉใ
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15
What is a thermal conductor? Give an example. (ไปไนๆฏๅฏผ็ญไฝ๏ผ่ฏทไธพไธไธชไพๅญใ)
A material that lets heat pass through easily, like metal. ไธ็ง่ฝ่ฎฉ็ญ้่ฝปๆพ้่ฟ็ๆๆ๏ผๅฆ้ๅฑใ
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15
How is an intrusive igneous rock different from an extrusive igneous rock? (ไพตๅ ฅๅฒฉๅๅทๅบๅฒฉๆไปไนไธๅ๏ผ)
Intrusive: Cooled slowly underground. Extrusive: Cooled quickly on the surface. ไพตๅ ฅๅฒฉ๏ผๅจๅฐไธ็ผๆ ขๅทๅดใๅทๅบๅฒฉ๏ผๅจๅฐ่กจๅฟซ้ๅทๅดใ
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15
Is burning paper a reversible or irreversible change? Why? (็ง็บธๆฏๅฏ้ๅๅ่ฟๆฏไธๅฏ้ๅๅ๏ผไธบไปไน๏ผ)
Irreversible. It cannot be turned back into paper. ไธๅฏ้ใๅฎไธ่ฝๅๅ็บธๅผ ใ
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15
What are the three main types of rock? (ๅฒฉ็ณๆๅชไธ็งไธป่ฆ็ฑปๅ๏ผ)
Igneous, Sedimentary, and Metamorphic. ็ซๆๅฒฉใๆฒ็งฏๅฒฉๅๅ่ดจๅฒฉใ
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15
What is the boiling point and melting point of water?
Boiling: 100ยฐC / Melting: 0ยฐC.
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15
What is the difference between a physical change and a chemical reaction? (็ฉ็ๅๅๅๅๅญฆๅๅบไน้ดๆไปไนๅบๅซ๏ผ)
Physical: Only the appearance changes. Chemical: A new substance is made. ็ฉ็ๅๅ๏ผไป ๅค่งๆนๅใๅๅญฆๅๅบ๏ผไบง็ไบๆฐ็ฉ่ดจใ
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15
What do we call the process where tiny particles settle at the bottom of a liquid? (ๆไปฌๆๅพฎๅฐ้ข็ฒๆฒ้ๅจๆถฒไฝๅบ้จ็่ฟ็จ็งฐไธบไปไน๏ผ)
Sedimentation (ๆฒๆท). When particles sink to the bottom. (ๅฝ้ข็ฒๆฒๅฐๆฐดๅบๆถใ)
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15
What two things are needed to turn a rock into a metamorphic rock? (ๅฐๅฒฉ็ณๅๆๅ่ดจๅฒฉ้่ฆๅชไธคๆ ทไธ่ฅฟ๏ผ)
Heat and Pressure (้ซๆธฉๅ้ซๅ)
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15
What is the difference between a solute and a solvent? (ๆบถ่ดจๅๆบถๅไน้ดๆไปไนๅบๅซ๏ผ)
Solute: The solid that dissolves. Solvent: The liquid (like water). ๆบถ่ดจ๏ผๆบถ่งฃ็ๅบไฝใๆบถๅ๏ผๆบถ่งฃๅบไฝ็ๆถฒไฝ๏ผๅฆๆฐด๏ผใ
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15
What is a "property"?
A characteristic (็นๅพ). Examples: Color, size, shape (้ข่ฒใๅคงๅฐใๅฝข็ถ).
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15
In which type of rock are almost all fossils found? (ๅ ไนๆๆ็ๅ็ณ้ฝๆฏๅจๅช็งๅฒฉ็ณไธญๅ็ฐ็๏ผ)
