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[8th Grade] Chapter 1 Test

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Last updated about 1 year ago
23 questions
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Question 1
1.

Question 2
2.

Is making fire a physical property or a chemical property? How do you know? 生火是物理性质还是化学性质?你怎么知道?

Question 3
3.

How many nanometers are in 0.7 millimeters? 7毫米等于多少纳米?

Question 4
4.

Steel can be separated into iron and carbon, true or false 钢可以分为铁和碳, 正确或错误

Question 5
5.

A compound has to have 2 or more atoms
化合物必须有 2 个或更多原子, 正确或错误

1
Question 6
6.

This could be an artist's picture of:

Question 7
7.

Which of these are correct chemical formulas?
哪些是正确的化学式?

Question 8
8.

Which of these is the smallest unit of an element

Question 9
9.

Explain why O2 and O3 are different compounds
解释为什么 O2 和 O3 是不同的化合物

Question 10
10.

Which method is best for separating a homogenous mixture of water and acetone?
哪种方法最适合分离水和丙酮的同质混合物?

Question 11
11.

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
Question 12
12.

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?

Question 13
13.

Question 14
14.

The density of gold is 19.3 g/cm3. What is the mass of 0.537 cm3 of gold?

Question 15
15.

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。

  1. Honey (1.36 g/mL)
  2. Corn syrup (1.33 g/mL)
  3. Water
  4. Oil (0.91 g/mL)
Question 16
16.

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 17
17.

Mark all the processes that are physical changes
物理的変化であるすべてのプロセスに印をつける
标出所有属于物理变化的过程

Question 18
18.

Match each chemical change with its description
将每种化学变化与其描述相匹配
各化学変化とその説明を一致させる

Draggable itemarrow_right_altCorresponding Item
Electrolysis
电解
電気分解
arrow_right_alt
Rapid combination of a fuel with oxygen producing heat and light
燃料与氧气快速结合产生热和光
燃料と酸素を素早く結合させ、熱と光を発生させる。
arrow_right_alt
arrow_right_alt
arrow_right_alt
Question 19
19.

Assuming no mass escapes, explain why the mass of a rusted nail is greater than the mass of a nail before it is rusted
假设没有质量逃逸,请解释为什么生锈钉子的质量大于未生锈钉子的质量。
質量が逃げないと仮定して、錆びた釘の質量が錆びる前の釘の質量より大きい理由を説明しなさい。

Question 20
20.

Which is the correct explanation for the difference between temperature and thermal energy?
关于温度和热能之间的区别,哪种解释是正确的?
温度と熱エネルギーの違いについて、正しい説明はどれか?

Question 21
21.

The ability to dissolve in water and to conduct electric current are examples of
溶于水和导电的能力是
水に溶ける能力、電流を流す能力はその一例である。

Question 22
22.
  • Evaporation of alcohol
    酒精蒸发
    アルコールの蒸発
  • Temperature goes up over time
    温度随时间上升
    時間の経過とともに温度が上がる
  • Heat energy is released out of the chemical reaction
    反应释放热能
    反応により熱エネルギーが放出される
  • Heat energy is absorbed into the chemical reaction
    从周围吸收热能
    熱エネルギーは周囲から吸収される
Question 23
23.

Does this chemical reaction diagram demonstrate conservation of mass? Why or why not?
这个化学反应图是否证明了质量守恒?为什么?
この化学反応図は質量保存を示しているか?なぜですか、なぜですか?

Which of these are chemical properties:
以下哪些是化学性质:
a piece of iron rusts, 一块铁生锈,
water freezes into ice, 水冻结成冰,
you start a fire, 你生火,
wax gets soft as it warms up, 蜡加热时变软,
you bend a piece of metal, 你弯曲一块金属,
aluminum and sodium hydroxide react to make hydrogen gas, 铝和氢氧化钠反应产生氢气
ammonia molecules
氨分子
oxygen molecules
氧分子
water molecules
水分子
CO2
None of these
这些都不是
magnetic attraction
磁吸引力
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
{\frac{390 grams}{1} \div \frac{1 kilograms}{1000 gram}}
{\frac{390 grams}{1} \times \frac{1000 grams}{1 kilogram}}
none of these
Which of these quantities is a measurement of density?
其中哪个量是密度的测量值?
10 kg/L
3.141 pounds per square inch
22.2 g/mL
100 g/cm3
1000 pounds/ft
none of these measure density 这些都不能测量密度
99 kg/m3
38.6 grams
19.3 grams
3860 grams
melting butter for popcorn 融化黄油制作爆米花 ポップコーン用のバターを溶かす
cooking butter until it starts to turn brown 烹饪黄油,直到它开始变成棕色 バターを茶色になるまで煮る
drying wet clothes 烘干湿衣服 濡れた衣服を乾かす
lighting a match 点燃火柴 マッチに火をつける
Oxidation
氧化
酸化
Using electricity to break a compound into elements or simpler compounds
用电将化合物分解成元素或更简单的化合物
電気を使って化合物を元素やより単純な化合物に分解する
Combustion
燃烧
燃焼
Combination of a substance with oxygen, such as when iron rusts
物质与氧气结合,如铁生锈
鉄が錆びるときのように、物質と酸素が結合すること。
Tarnishing
褪色
変色
Slow combination of a bright metal with another substance to produce a dark coating
亮金属与另一种物质缓慢结合,产生深色涂层
光沢のある金属と別の物質がゆっくりと結合し、黒っぽい被膜を生成する。
temperature measures average kinetic energy, but thermal energy measures total kinetic energy
温度测量的是平均动能,而热能测量的是总动能
温度は平均運動エネルギーを測定するが、熱エネルギーは全運動エネルギーを測定する。
none of these
这些都不是
いずれでもない
physical changes
物理变化
物理的変化
chemical bonding
化学键
化学結合
Temperature goes down over time
温度随时间降低
時間の経過とともに温度が下がる
Endothermic
内热
吸熱
Exothermic
放热
発熱