Sunblock
Titanium dioxide and zinc oxide are in
sunblock in sunscreen.
They contain reflective particles to repel
the sun from the skin.
In the past, sunblock was visible on the
Skin but now the oxide particles have
been made smaller.
That sunscreen is still around but a lot
more rare.
Sunscreen VS Sunblock
Sunscreen reduces the amount of UV
that hits the skin.
Sunblock reduces the amount of UV
that hits the skin by reflecting it away.
VS