Ques: Q: Burning trees produces most of the same pollutants as burning what? Read this paragraph and choose the correct option from the provided answers: Millions of acres of forest have been cut and burned to make way for farming. Figure below shows an example. Burning trees produces most of the same pollutants as burning fossil fuels. Choices: - fossil compounds - carbon - coal fuels - fossil fuels A:
Ans: fossil fuels

Ques: Q: What is the series of changes in the reproductive system of a mature female that happens monthly? Read this paragraph and choose the correct option from the provided answers: The menstrual cycle is a series of changes in the reproductive system of mature females that repeats every month. While the egg and follicle are developing in the ovary, tissues are building up inside the uterus , the reproductive organ where the baby would develop. The uterus develops a thick lining covered in tiny blood vessels. This prepares the uterus to receive an egg that could develop into a child (a fertilized egg). The occurs during the first part of the cycle. Choices: - urinary cycle - fetal cycle - pregnancy - menstrual cycle A:
Ans: menstrual cycle

Ques: Q: Another way to classify matter is to describe it as a solid, a liquid, or a gas, which was done in the examples of solutions. these three descriptions, each implying that the matter has certain physical properties, represent the three of these? Read this paragraph and choose the correct option from the provided answers: Another way to classify matter is to describe it as a solid, a liquid, or a gas, which was done in the examples of solutions. These three descriptions, each implying that the matter has certain physical properties, represent the three phases of matter. A solid has a definite shape and a definite volume. Liquids ordinarily have a definite volume but not a definite shape; they take the shape of their containers. Gases have neither a definite shape nor a definite volume, and they expand to fill their containers. We encounter matter in each phase every day; in fact, we regularly encounter water in all three phases: ice (solid), water (liquid), and steam (gas). We know from our experience with water that substances can change from one phase to another if the conditions are right. Typically, varying the temperature of a substance (and, less commonly, the pressure exerted on it) can cause a phase change, a physical process in which a substance goes from one phase to another (Figure 1.4 "Boiling Water"). Phase changes have particular names depending on what phases are involved, as summarized in Table 1.1 "Phase Changes". Table 1.1 Phase Changes. Choices: - phases of mass - types of atoms - forms of substances - phases of matter A:
Ans: phases of matter

Ques: Q: What elements do water and hydrogen peroxide consist of? Read this paragraph and choose the correct option from the provided answers: Look at the Figure below of water (H 2 O) and hydrogen peroxide (H 2 O 2 ), and read about these two compounds. Both compounds consist of hydrogen and oxygen, but they have different ratios of the two elements. As a result, water and hydrogen peroxide are different compounds with different properties. If you've ever used hydrogen peroxide to disinfect a cut, then you know that it is very different from water!. Choices: - carbon and oxygen - calcium and oxygen - hydrogen and helium - hydrogen and oxygen A:
Ans:
hydrogen and oxygen