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[8th Grade] Week 2 Quiz

Last updated about 1 year ago

4 questions

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？

1

Question 3

3.

How many nanometers are in 70 millimeters? 7毫米等于多少纳米？

1

Question 1

1.

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

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

True

False