*Question*
Q: What is the study of energy and how it interacts with matter? Read this paragraph and choose the correct option from the provided answers: Physics is the study of energy and how it interacts with matter. Important concepts in physics include motion, forces such as magnetism and gravity, and different forms of energy. Physics concepts can answer all the questions on the right page of the notebook in Figure above . Choices: - quantum mechanics - cosmology - kinetics - physics A:
**Answer**
physics

*Question*
Q: What type of species have a large effect on the balance of organisms in an ecosystem? Read this paragraph and choose the correct option from the provided answers: Predators play an important role in an ecosystem. For example, if they did not exist, then a single species could become dominant over others. Grazers on a grassland keep grass from growing out of control. Predators can be keystone species . These are species that can have a large effect on the balance of organisms in an ecosystem. For example, if all of the wolves are removed from a population, then the population of deer or rabbits may increase. If there are too many deer, then they may decrease the amount of plants or grasses in the ecosystem. Decreased levels of producers may then have a detrimental effect on the whole ecosystem. In this example, the wolves would be a keystone species. Choices: - decomposers - producers - secondary consumers - keystone A:
**Answer**
keystone

*Question*
Q: What kind of gland produces an oily substance that waterproofs the hair and skin? Read this paragraph and choose the correct option from the provided answers: oily substance produced in the dermis by a sebaceous gland that waterproofs the hair and skin. Choices: - secretion gland - nail gland - mucous gland - sebaceous gland A:
**Answer**
sebaceous gland

*Question*
Q: The skin plays an important role in preventing the escape of what commonly found liquid from the body? Read this paragraph and choose the correct option from the provided answers: The skin has multiple roles in the body. Many of these roles are related to homeostasis. The skin's main functions are preventing water loss from the body and serving as a barrier to the entry of microorganisms. In addition, melanin in the skin blocks UV light and protects deeper layers from its damaging effects. Choices: - hormones - stomach acid - urine - water A:
**Answer**
water