Q: Name the physicist who discovered radioactivity? Read this paragraph and choose the correct option from the provided answers: Radioactivity was discovered in 1896 by a French physicist named Antoine Henri Becquerel. Becquerel was experimenting with uranium, which glows after being exposed to sunlight. Becquerel wanted to see if the glow was caused by rays of energy, like rays of light and X-rays. He placed a bit of uranium on a photographic plate. The plate was similar to film that's used today to take X-rays. You can see an example of an X-ray in Figure below . As Becquerel predicted, the uranium left an image on the photographic plate. This meant that uranium gives off rays after being exposed to sunlight. Choices: - louis pasteur - neal degrasse tyson - albert einstein - antoine henri becquerel A:
antoine henri becquerel

Q: What is the type of reproduction where part of the parent plant is used to generate a new plant? Read this paragraph and choose the correct option from the provided answers: 32.3 Asexual Reproduction Many plants reproduce asexually as well as sexually. In asexual reproduction, part of the parent plant is used to generate a new plant. Grafting, layering, and micropropagation are some methods used for artificial asexual reproduction. The new plant is genetically identical to the parent plant from which the stock has been taken. Asexually reproducing plants thrive well in stable environments. Plants have different life spans, dependent on species, genotype, and environmental conditions. Parts of the plant, such as regions containing meristematic tissue, continue to grow, while other parts experience programmed cell death. Leaves that are no longer photosynthetically active are shed from the plant as part of senescence, and the nutrients from these leaves are recycled by the plant. Other factors, including the presence of hormones, are known to play a role in delaying senescence. Choices: - sexual reproduction - coaxed reproduction - byproduct reproduction - asexual reproduction A:
asexual reproduction

Q: Q: The period of life between the start of puberty and the beginning of adulthood is called? Read this paragraph and choose the correct option from the provided answers: Adolescence is the period of life between the start of puberty and the beginning of adulthood. Adolescence includes the physical changes of puberty. It also includes many other changes, including significant mental, emotional, and social changes. During adolescence:. Choices: - prenatal - old age - youth - adolescence A:
A: adolescence

Question: Q: How are weather patterns formed? Read this paragraph and choose the correct option from the provided answers: Weather refers to conditions of the atmosphere at a given time and place. It occurs because of unequal heating of the atmosphere. Humidity, clouds, and precipitation are important weather factors. Choices: - carbon dioxide - pollution from planes - the moon's gravitational pull - uneven heating of the atmosphere A:
Answer: uneven heating of the atmosphere

*Question*
Q: Zinc is more easily oxidized than iron because zinc has a lower reduction potential. since zinc has a lower reduction potential, it is a more what? Read this paragraph and choose the correct option from the provided answers: One way to keep iron from corroding is to keep it painted. The layer of paint prevents the water and oxygen necessary for rust formation from coming into contact with the iron. As long as the paint remains intact, the iron is protected from corrosion. Other strategies include alloying the iron with other metals. For example, stainless steel is mostly iron with a bit of chromium. The chromium tends to collect near the surface, where it forms an oxide layer that protects the iron. Zinc-plated or galvanized iron uses a different strategy. Zinc is more easily oxidized than iron because zinc has a lower reduction potential. Since zinc has a lower reduction potential, it is a more active metal. Thus, even if the zinc coating is scratched, the zinc will still oxidize before the iron. This suggests that this approach should work with other active metals. Another important way to protect metal is to make it the cathode in a galvanic cell. This is cathodic protection and can be used for metals other than just iron. For example, the rusting of underground iron storage tanks and pipes can be prevented or greatly reduced by connecting them to a more active metal such as zinc or magnesium (Figure 17.18). This is also used to protect the metal parts in water heaters. The more active metals (lower reduction potential) are called sacrificial anodes because as they get used up as they corrode (oxidize) at the anode. The metal being protected serves as the cathode, and so does not oxidize (corrode). When the anodes are properly monitored and periodically replaced, the useful lifetime of the iron storage tank can be greatly extended. Choices: - much metal - Trap metal - usually metal - active metal A:
**Answer**
active metal

Q: Q: What happens to most of the energy in a trophic level as it passes to the next higher level? Read this paragraph and choose the correct option from the provided answers: Choices: - it increases - it is transferred - it stays the same - it is lost A:
A: it is lost