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Halogens. Boiling point increase as you go down the group. (This is because the size of the molecules increase as you go down the group, which increases the strengths of van der Waals forces)

Photosynthesis. This question may throw some students off because: 1: They may be used to the question phased as something like 'By what process do plants generate glucose' 2: They may not be aware that a...

An exothermic reaction is one in which heat is released from the reaction system to its surroundings, causing an increase in temperature. 'Exo' means to give off, heat is expelled in this reaction. An end...

• There is genetic variation within the population of bacteria
• The variation has occurred due to random genetic mutations
• This variation means that a bacterium may have a mutation th...

There are 6 different cases in Russian, lets go through the first one: 1) nominative (именительный падеж)- this is when the noun of a sentence is the subject of the sentence. So it answers the questions '...