IS1 T1 Intro to Matter

What is matter/什麼是物質

• Anything visible or touchable/任何可見或可觸摸的東西
• Anything with mass and volume/任何具有質量並佔據空間的東西
• Only solids liquids and gases/只有固體液體和氣體
• Any physical object/任何物理物體

Which of these is NOT an example of matter/以下哪一項不是物質的例子

• Air/空氣
• Light/光
• Water/水
• Metal/金屬

Which property of matter allows us to measure how much space it occupies/哪種物質的特性允許我們測量它佔據的空間

• Mass/質量
• Volume/體積
• Density/密度
• Shape/形狀

Why is water considered a compound/為什麼水被認為是化合物

• It contains hydrogen and oxygen atoms chemically bonded/它含有化學鍵結的氫原子和氧原子
• It can exist in solid liquid and gaseous states/它可以以固體液體和氣體形式存在
• It has no fixed shape/它沒有固定形狀
• It has mass and takes up space/它具有質量並佔據空間

What distinguishes a compound from a mixture/化合物與混合物的區別是什麼

• Compounds are chemically bonded mixtures are not/化合物是化學鍵結的混合物不是
• Mixtures are made of only one element/混合物只由一種元素組成
• Compounds can be physically separated/化合物可以通過物理方式分離
• Mixtures have definite proportions/混合物有固定比例

A chef wants to separate a mixture of oil and water Which method would work best/案例研究 一名廚師想將油和水的混合物分離 哪種方法最有效

• Filtration/過濾
• Using a funnel/倒漏斗
• Evaporation/蒸發
• Distillation/蒸餾

Why is dissolving sugar in water considered a physical change/為什麼將糖溶解在水中被認為是物理變化

• The sugar molecules are chemically altered/糖分子發生了化學改變
• The sugar remains chemically the same/糖在化學上保持不變
• A new substance is formed/形成了新物質
• The sugar cannot be recovered/糖無法回收

Which of these is a chemical change/以下哪一項是化學變化

• Breaking a glass/打碎玻璃
• Burning wood/燃燒木材
• Dissolving salt in water/在水中溶解鹽
• Melting ice cube/融化冰塊

A student observes that a mixture of sand and iron filings can be separated with a magnet What does this suggest/案例研究 一名學生觀察到沙子和鐵屑的混合物可以用磁鐵分離 這說明了什麼

• Sand is magnetic/沙子具有磁性
• Iron is a compound/鐵是一種化合物
• The mixture is homogeneous/該混合物是均質的
• Iron filings are attracted to magnets/鐵屑會被磁鐵吸引

What is the formula for density/密度的公式是什麼

• Density = Mass ÷ Volume/密度 = 質量 ÷ 體積
• Density = Mass × Volume/密度 = 質量 × 體積
• Density = Volume ÷ Mass/密度 = 體積 ÷ 質量
• Density = Mass + Volume/密度 = 質量 + 體積