Answer the following question given this paragraph: Did you ever rub an inflated balloon against your hair? You can see what happens in Figure below . Friction between the rubber of the balloon and the baby's hair results in electrons from the hair "rubbing off" onto the balloon. That's because rubber attracts electrons more strongly than hair does. After the transfer of electrons, the balloon becomes negatively charged and the hair becomes positively charged. As a result, the individual hairs repel each other and the balloon and the hair attract each other. Electrons are transferred in this way whenever there is friction between materials that differ in their ability to give up or accept electrons. Q: When a balloon is rubbed against hair, they attract each other because of a difference in what? Choices: - Force - Friction - actions - charges A:
charges
(Question)
Answer the following question given this paragraph: Reactants and products are equally abundant at equilibrium. Q: At equilibrium reactants and what are equally abundant? Choices: - results - proactives - minerals - products A:
(Answer)
products
Ques: Answer the following question given this paragraph: Once you start eating, saliva wets the food, which makes it easier to break up and swallow. Digestive enzymes, including the enzyme amylase, start breaking down starches into sugars. Your tongue helps mix the food with the saliva and enzymes. Q: Digestive enzymes, including which enzyme, start breaking down starches into sugars? Choices: - triglyceride - cortisol - melatonin - amylase A:
Ans: amylase
(Q).
Answer the following question given this paragraph: Scientists did not actually see viruses for the first time until the 1930s. That's when the electron microscope was invented. The virus shown in Figure below was the first one to be seen. Q: Scientists did not actually see viruses until what was invented? Choices: - magnifying glass - electronic scale - telescope - electron microscope A:
(A).
electron microscope
Ques:Answer the following question given this paragraph: One way mammals lose excess heat is by increasing blood flow to the skin. This warms the skin so heat can be given off to the environment. That's why you may get flushed, or red in the face, when you exercise on a hot day. You are likely to sweat as well. Sweating also reduces body heat. Sweat wets the skin, and when it evaporates, it cools the body. Evaporation uses energy, and the energy comes from body heat. Animals with fur, such as dogs, use panting instead of sweating to lose body heat (see Figure below ). Evaporation of water from the tongue and other moist surfaces of the mouth and throat uses heat and helps cool the body. Q: How do dogs lose body heat? Choices: - barking - sweating - eating - panting A:

Ans:panting
Question: Answer the following question given this paragraph: When hot water gently rises to the surface, it creates a hot spring . A hot spring forms where a crack in the Earth allows water to reach the surface after being heated underground. Many hot springs are used by people as natural hot tubs. Some people believe that hot springs can cure illnesses. Hot springs are found all over the world, even in Antarctica!. Q: When hot water gently rises to the surface, it creates a what? Choices: - steam cloud - volcano - fissure - hot spring A:
Answer:
hot spring