You got 20 out of 25!

From the gravity that keeps our feet planted on the ground to the movement of the tides, the weather, and the skies above us, there is a vast treasure trove of knowledge in our shared experiences. Biology, ecology, chemistry, physics and astronomy are all covered in this super fun quiz of how the natural world works. When it comes to science, are you a top producer in this knowledge ecosystem or just a parasitic bottom-feeder?

This is a science quiz that will test your knowledge on a variety of topics. All questions are multiple choice, so you will need to select the correct answer from a list of options. If you can't answer the question, don't worry. We've also included the correct answer at the end of each question. Wherever your strengths lie, you're likely to find something to challenge you in this quiz! If you can score at least 75 percent on this difficult science quiz then we know for sure you are a particularly knowledgeable person.