For most substances, the distance between particles is smallest when the substance exists as
a a liquid
b a gas
c a solid
d none of the above

What are chlorofluorocarbons and what impact do they have on the atmosphere?

True or false: the revolution of the earth creates day and night as it rotates around the sun

The seven sisters, seven stars located more than 400 light-years away in the taurus constellation can be seen here with venus and another constellation, orion. the seven stars stay grouped together but seem to move, like the planet venus. why do stars seem to move like planets in the night sky?