Ques: Q: What force holds together both types of star clusters? Read this paragraph and choose the correct option from the provided answers: Star clusters are small groups of stars. A star cluster is smaller than a galaxy. There are two main types, open clusters and globular clusters. Both types are held together by gravity. Choices: - weight - magnetism - inertia - gravity A:
Ans: gravity

Ques: Q: What occurs when force is applied to a moving object? Read this paragraph and choose the correct option from the provided answers: Acceleration occurs when a force is applied to a moving object. Choices: - stimulation - inertia - transmission - acceleration A:
Ans: acceleration

Ques: Q: What is the most complex organ in the human body? Read this paragraph and choose the correct option from the provided answers: The human brain is an amazing organ. It is the most complex organ in the human body. By adulthood, the brain weighs about 3 pounds and consists of billions of neurons. All those cells need a lot of energy. In fact, the adult brain uses almost a quarter of the total energy used by the body!. Choices: - heart - liver - muscular - brain A:
Ans: brain

Ques: Q: During strenuous exercise our muscles perform what kind of fermentation? Read this paragraph and choose the correct option from the provided answers: Animals and some bacteria and fungi carry out lactic acid fermentation. Lactic acid is a waste product of this process. Our muscles perform lactic acid fermentation during strenuous exercise, since oxygen cannot be delivered to the muscles quickly enough. The buildup of lactic acid is believed to make your muscles sore after exercise. Bacteria that produce lactic acid are used to make cheese and yogurt. The lactic acid causes the proteins in milk to thicken. Lactic acid also causes tooth decay, because bacteria use the sugars in your mouth for energy. Choices: - nitric acid - residual acid - excessive acid - lactic acid A:
Ans:
lactic acid