Answer the following question given this paragraph: Scientists studied the distinctive pink color of the gas discharge created by hydrogen gas. When a narrow beam of this light was viewed through a prism, the light was separated into four lines of very specific wavelengths (and frequencies since and are inversely related). An atomic emission spectrum is the pattern of lines formed when light passes through a prism to separate it into the different frequencies of light it contains. The Figure below shows the atomic emission spectrum of hydrogen. Q: What do you call the pattern of lines formed when light passes through a prism to separate it into the different frequencies of light it contains? Choices: - prismatic rainbow - kaleidoscope effect - light emission spectrum - atomic emission spectrum A:
atomic emission spectrum
(Question)
Answer the following question given this paragraph: Within each leaf, the vascular tissue forms veins. The arrangement of veins in a leaf is called the venation pattern. Monocots and dicots differ in their patterns of venation (Figure 30.22). Monocots have parallel venation; the veins run in straight lines across the length of the leaf without converging at a point. In dicots, however, the veins of the leaf have a net-like appearance, forming a pattern known as reticulate venation. One extant plant, the Ginkgo biloba, has dichotomous venation where the veins fork. Q: What is the term for the arrangement of veins in a leaf? Choices: - dorsal pattern - vein pattern - cerebellum pattern - venation pattern A:
(Answer)
venation pattern
Ques: Answer the following question given this paragraph: material, and is intimately related to the polarizability of the material. Things Great and Small The Submicroscopic Origin of Polarization Polarization is a separation of charge within an atom or molecule. As has been noted, the planetary model of the atom pictures it as having a positive nucleus orbited by negative electrons, analogous to the planets orbiting the Sun. Although this model is not completely accurate, it is very helpful in explaining a vast range of phenomena and will be refined elsewhere, such as in Atomic Physics. The submicroscopic origin of polarization can be modeled as shown in Figure 19.18. Q: What process refers to a separation of charge within an atom or molecule? Choices: - diffusion - convection - rotation - polarization A:
Ans: polarization
(Q).
Answer the following question given this paragraph: a small scrap of paper onto a droplet of water, the paper floats on top of the water droplet, although the object is denser (heavier) than the water. This occurs because of the surface tension that is created by the water molecules. Cohesion and surface tension keep the water molecules intact and the item floating on the top. It is even possible to "float" a steel needle on top of a glass of water if you place it gently, without breaking the surface tension (Figure 2.11). Q: What causes a small scrap of paper placed on top of the water droplet to float , although the object is denser (heavier) than the water? Choices: - diffusion - transfusion - van der waals force - surface tension A:
(A).
surface tension
Ques:Answer the following question given this paragraph: Movable joints allow the greatest movement and are the most common. In these joints, the bones are connected by ligaments. The surfaces of the bones at the joints are covered with a smooth layer of cartilage. It reduces friction between the bones when they move. The space between the bones is also filled with a liquid called synovial fluid. It helps to cushion the bones. There are several different types of movable joints. You can see three of them in Figure below . Move these three joints in your own skeleton to experience the range of motion each allows. Q: The surfaces of the bones at the joints are covered with a smooth layer of cartilage, which reduces what force between the bones when they move? Choices: - vibration - expulsion - gravity - friction A:

Ans:friction
Answer the following question given this paragraph: Cleavage is the tendency of a mineral to break along certain planes. When a mineral breaks along a plane, it makes a smooth surface. Minerals with different crystal structures will break or cleave in different ways ( Figure below ). Halite tends to form cubes with smooth surfaces. Mica tends to form sheets. Fluorite can form octahedrons. Q: What term is used to describe the tendency of a mineral to break along certain planes? Choices: - tooth decay - porosis - erosion - cleavage A:
cleavage