Sun, Oct 41,299 questions

The Sun is a red dwarf star. Answer true or false.

answered false142 agreed, 140 neededsigned

DNA has a double-helix structure. Answer true or false.

answered true140 agreed, 140 neededsigned

Neutrons carry no electric charge. Answer true or false.

answered true142 agreed, 140 neededsigned

Water expands when it freezes. Answer true or false.

answered true143 agreed, 140 neededsigned