Answer the following question given this paragraph: Figure 22.13 (a) In the planetary model of the atom, an electron orbits a nucleus, forming a closed-current loop and producing a magnetic field with a north pole and a south pole. (b) Electrons have spin and can be crudely pictured as rotating charge, forming a current that produces a magnetic field with a north pole and a south pole. Neither the planetary model nor the image of a spinning electron is completely consistent with modern physics. However, they do provide a useful way of understanding phenomena. Q: What model of the atom features an electron orbiting a nucleus, forming a closed-current loop and producing a magnetic field with a north pole and a south pole?. Choices: - hydrogen model - solar model - gravitational model - planetary model A:
planetary model
Answer the following question given this paragraph: Enzymes work by lowering the activation energy needed to start biochemical reactions. Q: What organic catalysts work by lowering the activation energy needed to start biochemical reactions? Choices: - hormones - carbohydrates - glucose - enzymes A:
enzymes
Q: Answer the following question given this paragraph: The diaphragm is a sheet of muscle that spreads across the bottom of the rib cage. When the diaphragm contracts, the chest volume gets larger, and the lungs take in air. When the diaphragm relaxes, the chest volume gets smaller, and air is pushed out of the lungs. Q: What is a sheet of muscle that spreads across the bottom of the rib cage? Choices: - cartilage - thorax - diagram - diaphragm A:
A: diaphragm
Question: Answer the following question given this paragraph: Dissolved mineral salts wash into the ocean. As ocean water evaporates, it leaves the salts behind. This makes the water saltier. Ocean water is about 3.5 percent salts. The main salt is sodium chloride. Q: Concentration of what, the substance left behind when ocean water evaporates, is about 3.5 percent? Choices: - hydrogen - sugar - quartz - salts A:
Answer: salts
*Question*
Answer the following question given this paragraph: The first photosynthetic organisms were bacteria that lived in the water. So, where did plants come from? Evidence shows that plants evolved from freshwater green algae, a protist ( Figure below ). The similarities between green algae and plants is one piece of evidence. They both have cellulose in their cell walls, and they share many of the same chemicals that give them color. So what separates green algae from green plants?. Q: The first photosynthetic organisms were not plants, but types of what that lived in the water? Choices: - pathogens - fungi - algae - bacteria A:
**Answer**
bacteria
(Q).
Answer the following question given this paragraph: Barking, purring, and playing are just some of the ways in which dogs and cats behave. These are examples of animal behaviors. Animal behavior is any way that animals act, either alone or with other animals. Q: What is the way animals act either alone or with other animals called? Choices: - animal way - animal lifestyle - animal point - animal behavior A:
(A).
animal behavior