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  • 习惯测量的适当工具

    lesson content

    Megan runs a small dairy farm with her family. Right now they have 85 cows and they milk each cow twice a day. They sell some of the milk in their own store at their farm, and the rest they turn into yogurt or cheese or sell to local grocery stores. Megan likes to keep track of how much milk she gets each day from her cows. What unit of measurement would be most appropriate for recording the amount of milk her cows are producing each day?
    ::梅根和家人一起经营一个小型奶制品农场。现在,他们有85头奶牛,每头奶牛每天两次。他们把一些牛奶在农场自己的商店里卖掉,其余的变成酸奶或奶酪,或卖到当地杂货店。梅根喜欢跟踪她每天从奶牛那里得到多少牛奶。哪一种计量单位最适合记录她的奶牛每天生产的奶量?

    In this concept, you will learn how to choose appropriate tools and units for given customary measurement situations.
    ::在这个概念中,你们将学会如何选择适当的工具和单位,用于特定习惯计量情况。

    Choosing Appropriate Tools for Customary Measurement
    ::选择适当的习惯计量工具

    The  customary system  of measurement  is the system of measurement primarily used in the United States. The customary system includes units of  length , mass, and  capacity .
    ::习惯计量制度是主要在美国使用的计量制度,包括长度、质量和能力单位。

    When you want to measure something, the first thing you need to do is select an appropriate tool for measuring.
    ::当您想要测量某物时,首先需要做的是选择一个适当的测量工具。

    When measuring the length of an item or a distance, first consider how small or large it is. For a small item, it is best to use a  ruler . A ruler is 1  foot  (12 inches) in length and can be used to measure in  inches . To measure items or distances that are slightly longer than a foot, you can use a  yardstick . Yardsticks are 1  yard  (3 feet) in length. To measure the length of an even longer item or distance, you can use a  measuring tape . Measuring tapes can be uncurled to measure longer lengths. Measuring tapes usually show inches and feet.
    ::当测量一项物品的长度或距离时,首先考虑它的大小。对于一个小项目,最好使用标尺。标尺长度为1英尺(12英寸),可以用来测量英寸。测量比一英尺略长的物品或距离,可以使用一个标尺。电线杆长度为1码(3英尺),测量一个更长的物品或距离的长度,可以使用测量磁带。测量磁带的长度可以不划线以测量更长的长度。测量磁带通常显示英寸和脚。

    lesson content

    When measuring the weight or mass of a small object, you can use a scale or a balance. You can use a scale to measure  ounces  and  pounds .
    ::当测量一个小对象的重量或质量时,您可以使用一个比例或平衡。您可以使用一个比例来衡量盎司和磅。

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    When measuring units of capacity in cooking, you can use measuring cups and measuring spoons. Standard measuring cups come in 1  cup ,  1 2  cup,  1 3  cup, and  1 4  cup sizes. There are also 2-cup and 4-cup measuring cups to measure pints and quarts. You can use measuring spoons to measure teaspoons and tablespoons.
    ::当测量烹饪能力单位时, 您可以使用量杯和量勺。 标准量杯以1个杯、 12个杯、 13个杯和14个杯大小为单位。 还有2个杯子和4个杯子, 用来测量品脱和夸特。 您可以使用量勺来测量茶匙和汤匙。

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    Here is an example.
    ::举一个例子。

    Choose the appropriate tool for measuring the weight of an apple.
    ::选择用于测量苹果重量的适当工具 。

    First, notice that you are looking for the weight of a small object. This means you should use a balance or a scale to do the measurement.
    ::首先,请注意您正在寻找一个小对象的重量。 这意味着您应该使用平衡或比例来进行测量 。

    The answer is the weight of an apple could be measured with a scale.
    ::答案是苹果的重量可以用比例尺测量。

    Here is another example.
    ::下面是另一个例子。

    Choose the appropriate tool for measuring the length of a caterpillar.
    ::选择测量毛虫长度的适当工具 。

    First, notice that you are looking for the length of a small item. This means you should use a ruler to do the measurement.
    ::首先,请注意您正在寻找一个小项目的长度。 这意味着您应该使用标尺来进行测量 。

    The answer is the length of a caterpillar could be measured with a ruler.
    ::答案是毛毛虫的长度 可以用尺子测量

    When you need to measure something, always consider the most reasonable unit to use before measuring. If you choose a unit that is too small, you will get a large number that is hard to keep track of. If you choose a unit that is too large, it will be difficult to be precise in your measurement.
    ::当您需要测量某物时, 在测量前总是会考虑最合理的单位 。 如果您选择一个太小的单位, 就会得到一个难以跟踪的单位 。 如果您选择一个太大的单位, 测量时就很难精确了 。

    Let's look at an example.
    ::让我们举个例子。

    Choose the appropriate customary unit to measure the weight of a jar of jam.
    ::选择适当的习惯单位来衡量罐酱重量。

    First, notice that you are looking for a weight. A jar of jam is relatively small and likely weighs less than a pound. This means it would be best measured in ounces.
    ::首先,请注意,你正在寻找一个重量。一罐果酱相对较小,可能重量低于一磅。这意味着用盎司来衡量最好。

    The answer is the weight of a jar of jam would be best measured in ounces.
    ::答案是一罐果酱的重量 最好用盎司来衡量

    Examples
    ::实例

    Example 1
    ::例1

    Earlier, you were given a problem about Megan and her family's dairy farm.
    ::早些时候,你得到一个问题 梅根和她家的奶制品农场。

    Megan wants to keep track of the amount of milk her 85 cows are producing each day and needs to know what unit of measurement would be most appropriate to use.
    ::梅根想追踪她的85头奶牛每天生产的牛奶数量,

    First, Megan should keep in mind that she is looking for a capacity. The amount of milk that 85 cows produce each day is a large amount. This means it would be best measured in gallons.
    ::首先,梅根应该记住,她正在寻找一种能力。 85头奶牛每天生产的牛奶数量是巨大的。 这意味着用加仑来衡量是最好的。

    The answer is Megan should record the amount of milk produced by her cows each day in gallons.
    ::答案是梅根应该记录 她的奶牛每天生产的牛奶数量 用加仑。

    Example 2
    ::例2

    What tool and unit would you use to measure the height of a tree?
    ::您用什么工具和单位来衡量树的高度?

    First, notice that you are looking for a height. A typical tree is more than a few feet tall. This means you should use a measuring tape to do the measurement.
    ::首先,请注意您正在寻找一个高度。 典型的树有几英尺高。 这意味着您应该使用测量磁带进行测量 。

    Next, think about the unit. A tree is more than a few feet tall, but much less than a  mile  tall. It would make sense to measure the height of a tree in feet or yards.
    ::接下来,想想这个单位。一棵树有几英尺高,但远不到一英里高。用脚或码来衡量一棵树的高度是有道理的。

    The answer is the height of a could be measured with a measuring tape in feet or yards.
    ::答案是,可以用测量带子测量一个高度的英尺或码数。

    Example 3
    ::例3

    What is the best tool to measure milk needed for a recipe?
    ::衡量配方所需牛奶的最佳工具是什么?

    First, notice that you are looking for a volume or capacity for cooking. This means you should use a measuring cup to do the measurement.
    ::首先,请注意您正在寻找做饭的体积或容量。 这意味着您应该用一个测量杯来进行测量 。

    The answer is the volume of milk needed for a recipe could be measured with a measuring cup.
    ::答案是配方所需的牛奶量可以用一个量杯来衡量。

    Example 4
    ::例4

    What is the best tool to measure the dimensions of a garden plot?
    ::衡量园艺面积的最佳工具是什么?

    First, notice that you are looking for lengths. A typical garden plot is more than a few feet long. This means you should use a measuring tape to do the measurement.
    ::首先,请注意您正在寻找长度。 典型的花园地块长于几英尺。 这意味着您应该使用测量磁带进行测量 。

    The answer is the dimensions of a garden plot could be measured with a measuring tape.
    ::答案是花园地块的尺寸 可以用测量磁带测量

    Example 5
    ::例5

    What is the best tool to measure the weight of a bunch of bananas?
    ::衡量香蕉重量的最佳工具是什么?

    First, notice that you are looking for a weight. A typical bunch of bananas is something that you can carry, so it is not too big. This means you should use a balance or a scale to do the measurement.
    ::首先,请注意您正在寻找一个重量。 典型的香蕉是您可以携带的, 所以不会太大。 这意味着您应该使用平衡或比例来进行测量 。

    The answer is the weight of a bunch of bananas could be measured with a scale.
    ::答案是,可以用一个尺度来衡量 一堆香蕉的重量。

    Review
    ::回顾

    Choose the appropriate tool for the following measurements.
    ::为以下测量选择适当的工具。

    1. The weight of a violin
      ::小提琴的重量
    2. The volume of a small amount of oregano
      ::少量牛食量
    3. The volume of a glass of milk
      ::一杯牛奶的体积
    4. The length of one side of your desk
      ::您办公桌一侧的长度
    5. Sugar for a cup of coffee
      ::给一杯咖啡的糖糖
    6. The amount of sugar needed for a cake
      ::蛋糕所需的糖量
    7. The weight of a person
      ::一个人的体重

    Choose the appropriate unit for the following measurements.
    ::为下列测量选择适当的单位。

    1. The length of a football field
      ::足球场的长度
    2. The volume of a car’s gas tank
      ::汽车油罐的油量
    3. The length of an insect
      ::昆虫的长度
    4. The weight of a tennis shoe
      ::网球鞋的重量
    5. The distance a person runs in 1 hour
      ::一个人一小时内跑的距离
    6. The amount of water in a large drum
      ::大型桶里的水量
    7. The amount of water in a pool
      ::池中的水量
    8. The size of a child’s foot
      ::儿童脚的大小