實驗（一次性的）

(a)  

電插座

(a)  

危險警告標記

(a)  

通風的

(a)  

火三角

(a)  

滅火氈

(a)  

道德準則

(a)  

發明

(a)  

容器

(a)  

科技

(a)  

通風櫥

(a)  

實驗

（一系列試驗、持續的）

(a)  

限制

(a)  

現象

(a)  

科學家

(a)  

有系統的

(a)  

證據

(a)  

滅火沙桶

(a)  

微生物

(a)  

細菌

(a)  

確定不變的

(a)  

發現

(a)  

顯微鏡

(a)  

胎兒

(a)  

自然資源

(a)  

滅火筒

(a)  

實驗室

(a)  

安全設備

(a)  

安全眼鏡

(a)  

急救箱

(a)  

合適的

(a)  

潛在危害

(a)  

電插頭

(a)  

安全措施

(a)  

化學品

(a)  

刺激性的

(a)  

必需條件

(a)  

燃料

(a)  

氧

(a)  

Scientific (a)   have increased our understanding of the natural world.

Scientific knowledge is (a)   when new evidence is found.

In a fair test, (a)   variable is the variable that we keep the same/ constant.

In a fair test, (a)   variable is the variable that we change.

Science is the study of (a)   and events in Nature.

Science is based on (a)   .

Scientific knowledge has its (a)   . It cannot solve all problems.

Scientific discoveries have also led to many (a)   that have improved our quality of life.

Scientific knowledge is applied in the development of (a)   .

In a fair test, (a)   variable is the variable that we measure

A (a)   is a suitable place for doing experiments.

When we handle chemicals in the laboratory, we must read the (a)  

on their containers and take safety precautions.