How many bones are there in the adult human body? Thinkstock 192 Correct Incorrect 192 206 Correct Incorrect 206 224 Correct Incorrect 224 270 Correct Incorrect 270 Correct! Wrong! There are 206 bones in the adult body. Newborns have over 300. Which of these is the femur? bbc.co.uk 1 Correct Incorrect 1 2 Correct Incorrect 2 3 Correct Incorrect 3 4 Correct Incorrect 4 Correct! Wrong! The femur is the scientific name for the thigh bone. Via bbc.co.uk If a substance has a pH of 5, is it an acid or an alkali? Thinkstock Acid Correct Incorrect Acid Alkali Correct Incorrect Alkali Correct! Wrong! Any substance with a pH greater than 7 is an alkali, and a substance with a pH lower than 7 is an acid. If it has a pH of 7, it's neutral. Which of these is NOT an alkali? Thinkstock Sodium hydroxide Correct Incorrect Sodium hydroxide Potassium hydroxide Correct Incorrect Potassium hydroxide Zinc hydroxide Correct Incorrect Zinc hydroxide Correct! Wrong! Zinc hydroxide is not an alkali because it does not dissolve in water. What is the chemical symbol for copper? Answer Image Correct Incorrect Answer Image Correct Incorrect Answer Image Correct Incorrect Correct! Wrong! The chemical symbol for copper is Cu. Ca is the symbol for calcium, and Co is the symbol for cobalt. Which of these is an invertebrate? Answer Image Fish Correct Incorrect Fish Answer Image Butterfly Correct Incorrect Butterfly Answer Image Frog Correct Incorrect Frog Image: Via Thinkstock Snake Correct Incorrect Via Thinkstock Snake Via Thinkstock Correct! Wrong! Invertebrates are animals without backbones. Butterflies, like all insects, are a type of invertebrate known as an arthropod, which have an external skeleton, a segmented body, and jointed legs. What is this equation used to calculate? Pressure Correct Incorrect Pressure Momentum Correct Incorrect Momentum Velocity Correct Incorrect Velocity Correct! Wrong! The equation for momentum is mass in kg multiplied by velocity in m/s. In a circuit diagram, which of these is the correct symbol for a lamp? Answer Image Correct Incorrect Answer Image Correct Incorrect Image: Via Thinkstock Correct Incorrect Via Thinkstock Via Thinkstock Which of these is NOT a fossil fuel? Thinkstock Coal Correct Incorrect Coal Oil Correct Incorrect Oil Water Correct Incorrect Water Natural gas Correct Incorrect Natural gas Solar panels do not work at night. True or false? Answer Image Correct Incorrect Answer Image Correct Incorrect Correct! Wrong! Of course they don't! One of the main disadvantages of solar panels as a renewable energy source is their inability to work at night. What is an alloy? Thinkstock A metal in its purest form. Correct Incorrect A metal in its purest form. An inexpensive metal. Correct Incorrect An inexpensive metal. A mixture of two elements, one of which is a metal. Correct Incorrect A mixture of two elements, one of which is a metal. What process is used to purify copper? Thinkstock Neutralisation Correct Incorrect Neutralisation Electrolysis Correct Incorrect Electrolysis Radiation Correct Incorrect Radiation Correct! Wrong! In electrolysis, electricity is passed through solutions containing copper compounds, such as copper sulphate. The positive electrode (anode) is impure copper, and the negative electrode (cathode) is pure copper. Via scienceaid.co.uk In the equation for aerobic respiration, which word is missing? BuzzFeed Carbon Correct Incorrect Carbon Hydrogen Correct Incorrect Hydrogen Glucose Correct Incorrect Glucose Correct! Wrong! Via BuzzFeed Which part of your body produces bile? Thinkstock Liver Correct Incorrect Liver Pancreas Correct Incorrect Pancreas Stomach Correct Incorrect Stomach Correct! Wrong! Bile is an alkaline substance produced by the liver and stored in the gall bladder. What is the type of cell division that produces gametes? Thinkstock Mitosis Correct Incorrect Mitosis Meiosis Correct Incorrect Meiosis Correct! Wrong! Sex cells (aka gametes) are the product of meiosis.