Q: What is the small, dense region at the center of the atom that consists of positive protons and neutral neutrons? Read this paragraph and choose the correct option from the provided answers: The nucleus is a small, dense region at the center of the atom. It consists of positive protons and neutral neutrons, so it has an overall positive charge. Choices: - proton - electron - photon - nucleus A:
nucleus

Q: What organ system transports blood through the body and to and from the lungs? Read this paragraph and choose the correct option from the provided answers: in animals but also in plants. An organ system is a higher level of organization that consists of functionally related organs. Mammals have many organ systems. For instance, the circulatory system transports blood through the body and to and from the lungs; it includes organs such as the heart and blood vessels. Organisms are individual living entities. For example, each tree in a forest is an organism. Single-celled prokaryotes and single-celled eukaryotes are also considered organisms and are typically referred to as microorganisms. All the individuals of a species living within a specific area are collectively called a population. For example, a forest may include many pine trees. All of these pine trees represent the population of pine trees in this forest. Different populations may live in the same specific area. For example, the forest with the pine trees includes populations of flowering plants and also insects and microbial populations. A community is the sum of populations inhabiting a particular area. For instance, all of the trees, flowers, insects, and other populations in a forest form the forest's community. The forest itself is an ecosystem. An ecosystem consists of all the living things in a particular area together with the abiotic, non-living parts of that environment such as nitrogen in the soil or rain water. At the highest level of organization (Figure 1.16), the biosphere is the collection of all ecosystems, and it represents the zones of life on earth. It includes land, water, and even the atmosphere to a certain extent. Choices: - metabolism - digestive - nervous - circulatory A:
circulatory

Q: Q: Burning gas to run our cars is an example of how human activity is contributing to what global event? Read this paragraph and choose the correct option from the provided answers: Flickr:futureatlas. com (http://futureatlas. com/blog/). Human activities like burning gasoline in cars are contributing to a global change in our climate . CC BY 2.0. Choices: - ozone change - carbon change - metamorphic change - climate change A:
A: climate change

Question: Q: What is another word for thermal energy? Read this paragraph and choose the correct option from the provided answers: Choices: - solar - humidity - temperature - heat A:
Answer: heat

*Question*
Q: Geiger counters can be used to detect what, in general? Read this paragraph and choose the correct option from the provided answers: One reason radiation is dangerous is that it can't be detected with the senses. You normally can't see it, smell it, hear it, or feel it. Fortunately, there are devices such as Geiger counters that can detect radiation. A Geiger counter, like the one in Figure below , has a tube that contains atoms of a gas. If radiation enters the tube, it turns gas atoms to ions that carry electric current. The current causes the Geiger counter to click. The faster the clicks occur, the higher the level of radiation. You can see a video about the Geiger counter and how it was invented at the URL below. Choices: - seismic load - convection - evaporation - radiation A:
**Answer**
radiation

Q: What part of an atom is electrically neutral? Read this paragraph and choose the correct option from the provided answers: An atom's protons and electrons carry electrical charges. Protons, with their positive charge, are designated p+. Electrons, which have a negative charge, are designated e. An atom's neutrons have no charge: they are electrically neutral. Just as a magnet sticks to a steel refrigerator because their opposite charges attract, the positively charged protons attract the negatively charged electrons. This mutual attraction gives the atom some structural stability. The attraction by the positively charged nucleus helps keep electrons from straying far. The number of protons and electrons within a neutral atom are equal, thus, the atom's overall charge is balanced. Choices: - protons - electrons - newtons - neutrons A:
neutrons