固定性变数

(a)  

反应性变数

(a)  

提出问题

(a)  

目的

(a)  

假设

(a)  

实验步骤

(a)  

实验使用的材料和器材

(a)  

结论

(a)  

physics

(a)  

biology

(a)  

chemistry

(a)  

astronomy

(a)  

geology

(a)  

meteorology

(a)  

气象

(a)  

地质

(a)  

天文

(a)  

化学

(a)  

生物

(a)  

物理

(a)  

step 1 in a scientific investigation

(a)  

step 2 in a scientific investigation

(a)  

step 3 in a scientific investigation

(a)  

step 4 in a scientific investigation

(a)  

step 5 in a scientific investigation

(a)  

step 6 in a scientific investigation

(a)  

step 7 in a scientific investigation

(a)  

step 8 in a scientific investigation

(a)  

step 9 in a scientific investigation

(a)  

step 10 in a scientific investigation

(a)  

boiling tube

(a)  

test tube

(a)  

beaker, conical flask, round-bottomed flask, flat-bottomed flask

(a)  

measuring cylinder

(a)  

burette

(a)  

pipette

(a)  

tripod stand

(a)  

wire gauze

(a)  

filter funnel

(a)  

gas jar

(a)  

retort stand

(a)  

evaporating dish

(a)  

glass rod

(a)  

bensen burner

(a)  

crucible

(a)  

name 1

(a)  

name 2

(a)  

name 3

(a)  

step using bensen burner

step 1

(a)  

step using bensen burner

step 2

(a)  

step using bensne burner

step 3

(a)  

step using bensen burner

step 4

(a)  

step using bensen burner

step 5

(a)  

(a)  

(a)  

(a)  

(a)  

(a)  

(a)  

(a)  

(a)  

(a)  

(a)  

length

(a)  

area

(a)  

volume

(a)  

mass

(a)  

temperature

(a)  

time

(a)  

electric current

(a)