Difficulty level:
Difficulty:
B2-C2
Theme:
Science
Date:
2026-08-21
Click on an empty cell for your first clue.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
ACROSS
5
time travel 4 words
7
to analyze, to analyse
8
helium
10
corrosion
12
rust
13
chlorine
14
fluorine
17
gas (state of matter)
19
explosion (bomb)
20
fluoride
DOWN
1
magnetism
2
reflex (automatic response to a stimulus)
3
reversible (can be undone)
4
iodine
6
to evaporate (=to transition from liquid to gas)
9
biologist
11
nitrogen
13
crystal
15
atom
16
acid (chemistry)
17
gene (biology)
18
gender, sex
ACROSS
5
time travel 4 words
7
to analyze, to analyse
8
helium
10
corrosion
12
rust
13
chlorine
14
fluorine
17
gas (state of matter)
19
explosion (bomb)
20
fluoride
DOWN
1
magnetism
2
reflex (automatic response to a stimulus)
3
reversible (can be undone)
4
iodine
6
to evaporate (=to transition from liquid to gas)
9
biologist
11
nitrogen
13
crystal
15
atom
16
acid (chemistry)
17
gene (biology)
18
gender, sex