Q: Sandblasting a surface exemplifies what form of erosion? Read this paragraph and choose the correct option from the provided answers: Did you ever see workers sandblasting a building to clean it? Sand is blown onto the surface to scour away dirt and debris. Wind-blown sand has the same effect. It scours and polishes rocks and other surfaces. Wind-blown sand may carve rocks into interesting shapes ( Figure below ). This form of erosion is called abrasion. It occurs any time rough sediments are blown or dragged over surfaces. Can you think of other ways abrasion might occur?. Choices: - wind - glacial - water - abrasion A:
abrasion

(Question)
Q: Most fossils form when a dead organism is buried in what? Read this paragraph and choose the correct option from the provided answers: Most fossils form when a dead organism is buried in sediment. Layers of sediment slowly build up. The sediment is buried and turns into sedimentary rock. The remains inside the rock also turn to rock. The remains are replaced by minerals. The remains literally turn to stone. Fossilization is illustrated in Figure below . Choices: - soil - ash - sand - sediment A:
(Answer)
sediment

Ques: Q: What is the name of the cell that results when a sperm nucleus fuses with a egg nucleus? Read this paragraph and choose the correct option from the provided answers: When a sperm penetrates the egg, it triggers the egg to complete meiosis. The sperm also undergoes changes. Its tail falls off, and its nucleus fuses with the nucleus of the egg. The resulting cell, called a zygote , contains all the chromosomes needed for a new human organism. Half the chromosomes come from the egg and half from the sperm. Choices: - t cell - a cytoplasm - a filament - a zygote A:
Ans: a zygote

(Q).
Q: Nuclei with even numbers of protons, neutrons, or both are more likely to be this? Read this paragraph and choose the correct option from the provided answers: The nuclei that are to the left or to the right of the band of stability are unstable and exhibit radioactivity. They change spontaneously (decay) into other nuclei that are either in, or closer to, the band of stability. These nuclear decay reactions convert one unstable isotope (or radioisotope) into another, more stable, isotope. We will discuss the nature and products of this radioactive decay in subsequent sections of this chapter. Several observations may be made regarding the relationship between the stability of a nucleus and its structure. Nuclei with even numbers of protons, neutrons, or both are more likely to be stable (see Table 21.1). Nuclei with. Choices: - ionic - solid - unstable - stable A:
(A).
stable

Ques:Q: What is the process of producing eggs in the ovary is called? Read this paragraph and choose the correct option from the provided answers: The process of producing eggs in the ovary is called oogenesis. Eggs, like sperm, are haploid cells, and their production occurs in several steps that involve different types of cells, as shown in Figure below . You can follow the process of oogenesis in the figure as you read about it below. Choices: - gametogenesis - meiosis - morphogenesis - oogenesis A:

Ans:oogenesis

Ques: Q: Solid-state radiation detectors convert ionization produced in a semiconductor (like those found in computer chips) directly into what? Read this paragraph and choose the correct option from the provided answers: Solid-state radiation detectors convert ionization produced in a semiconductor (like those found in computer chips) directly into an electrical signal. Semiconductors can be constructed that do not conduct current in one particular direction. When a voltage is applied in that direction, current flows only when ionization is produced by radiation, similar to what happens in a Geiger tube. Further, the amount of current in a solid-state detector is closely related to the energy deposited and, since the detector is solid, it can have a high efficiency (since ionizing radiation is stopped in a shorter distance in solids fewer particles escape detection). As with scintillators, very sophisticated information can be obtained from solid-state detectors. PhET Explorations: Radioactive Dating Game Learn about different types of radiometric dating, such as carbon dating. Understand how decay and half life work to enable radiometric dating to work. Play a game that tests your ability to match the percentage of the dating element that remains to the age of the object. Choices: - thermal energy - microwaves - isotopes - electrical signal A:
Ans:
electrical signal