It can be a bit of an adjustment to start a new school with a different focus on learning. Not all primary schools do that kind of thing. He probably just needs a bit of encouragement and help g getting started, just be careful not to "scaffold" him too much, as he does need to develop the skills to do this kind of thing without help. But don't panic. All the sneering at least at the beginning of this thread isn't helpful. Children don't magically have all these skills, they pick them up by doing them. They aren't going to know that the Internet, a library and so on can be learning tools if they have never been encouraged to use and think about them in this way. Not all children will have come from schools that have already emphasised independent learning skills. Should a child be excluded from a grammar school place just because they lack this experience? Of course not.
First I would get him sorted in a good place for doing homework, so ideally between meals, when he's well rested, he's had a bit of downtime from school and he can have your undivided attention for a bit. He should have a clear, uncluttered place to work and get himself a glass of water or squash. I think snacks are too messy but if he's hungry a small snack first may help. If he has no uncluttered work space, make it your weekend task to help him set one up and a system for keeping it that way.
Next get him to read the question, properly read it and divide it up into steps. Some children have problems doing this so plenty of practice will help them. As this is a learn about question, that's self directed research. Get him to give you his suggestions of all the ways he might be able to research a topic. It might be he is stuck here, if this hasn't been something he's been used to doing. So then I would make suggestions - we can Google it. We can look on YouTube. We can look in a book, if we have no suitable books we can go to the library. Explain about librarians helping and library catalogues for different topics. See if he can think of anyone he knows or you know to ask. Usually the easiest way is to Google, but even this is a skill sorting out useful results from incorrect or overly confusing ones.
You're not teaching him the material, but you might need to teach him the skill of independent research if it's not something he's used to doing.