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[8th Grade] Week 6 Quiz

Last updated about 1 year ago

6 questions

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Question 6

6.

You have a collection of rocks and you think one of them might be gold. You already know the density of gold is 19.3 g/cm3. You have measured the mass of each of the rocks already. What should you do next to find out if any of the rocks is gold? Use the following key words: water, displacement, difference, density, calculate
你收集了一些石头，你认为其中一块可能是金子。你已经知道金子的密度是 19.3 克/立方厘米。您已经测量了每块石头的质量。下一步该怎么做才能知道其中是否有金子？使用以下关键词：水、位移、差异

Question 1

1.

Categorize these concepts as either relating to weight or to mass

将这些概念归类为与重量或质量有关的概念

measured in grams or kilograms
以克或公斤为单位
measures the force of gravity
测量重力
can be measured using a spring scale
可使用弹簧秤测量
can be measured using a balance and standardized objects (such as the standard 1 kg object)
可使用天平和标准物体（如 1 千克标准物体）进行测量
does not change if you measure it on a different planet
在不同的星球上测量也不会改变

Weight 重量
Mass 质量

Question 2

2.

Which illustrates the correct calculation to convert 390 grams into a quantity in kilograms?
将 390 克换算成千克的正确计算方法是什么？

{\frac{390 grams}{1} \times \frac{1000 grams}{1 kilogram}}

none of these

{\frac{390 grams}{1} \times \frac{1 kg}{1000 grams}}

{\frac{390 grams}{1} \div \frac{1 kilograms}{1000 gram}}

{\frac{390 grams}{1} \div \frac{1 grams}{1000 kilogram}}

Question 3

3.

Which of these quantities is a measurement of density?
其中哪个量是密度的测量值？

100 g/cm3

none of these measure density 这些都不能测量密度

1000 pounds/ft

10 kg/L

3.141 pounds per square inch

99 kg/m3

22.2 g/mL

Question 4

4.

The density of gold is 19.3 g/cm3. What is the mass of 200 cm3 of gold?

10.36 grams

38.6 grams

3860 grams

19.3 grams

none of these

Question 5

5.

Order these objects based on the order they would appear if they separated into layers in a cup.
根据这些物体在杯中分层的顺序排列它们。

Water
Corn syrup (1.33 g/mL)
Oil (0.91 g/mL)
Honey (1.36 g/mL)