Pregnancy test and r-7 rocket: what they have in common

1. Step 1. Pregnancy test — is made of — Cellulose. The strip is a nitrocellulose membrane.
2. Step 2. Cellulose — is material for — Smokeless powder. Nitrocellulose.
3. Step 3. Smokeless powder — is material for — Solid rocket motor. The propellant is smokeless powder.
4. Step 4. Solid rocket motor — is part of — Intercontinental ballistic missile. Solid-fuel ICBMs.
5. Step 5. Intercontinental ballistic missile — includes — R-7 rocket. The R-7 was designed as an ICBM.

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