Q: According to rutherford, where is the vast majority of the mass of an atom located? Read this paragraph and choose the correct option from the provided answers: Rutherford's experiment showed that the vast majority of the mass of an atom is concentrated in its nucleus, which is composed of protons and neutrons. The mass of an electron is very small compared to the mass of a neutron or proton, so the electrons in an element do not contribute much to the total mass. The mass number is defined as the total number of protons and neutrons in an atom. Remember that both protons and neutrons have a mass of approximately 1 amu. Knowing the mass number and the atomic number of an atom therefore allows you to determine the number of neutrons present in that atom by subtraction:. Choices: - the cytoplasm - the shell - the electrons - the nucleus A:
the nucleus

(Question)
Q: The creation and destruction of oceanic crust is the reason what moves? Read this paragraph and choose the correct option from the provided answers: In some places, the oceanic crust comes up to a continent. The moving crust pushes that continent away from the ridge axis as well. If the moving oceanic crust reaches a deep sea trench, the crust sinks into the mantle. The creation and destruction of oceanic crust is the reason that continents move. Choices: - animals - planets - oceans - continents A:
(Answer)
continents

Ques: Q: What is the ultimate source of energy for all life on earth? Read this paragraph and choose the correct option from the provided answers: Choices: - its core - Mars - the moon - the sun A:
Ans: the sun

(Q).
Q: What kinds of neutron stars emit radiation in pulses? Read this paragraph and choose the correct option from the provided answers: A pulsar is a rotating neutron star that emits radiation in pulses. A pulsar can only be seen when the beam is pointing toward Earth. Pictured below is a nebular that looks like a cosmic hand ( Figure below ). There is a bright swirl of gas in the wrist of the hand. A very tiny but bright neutron star is in the center of that swirl. Choices: - quasars - red giants - dwarf stars - pulsars A:
(A).
pulsars

Ques:Q: Where does a baby travel to after leaving the uterus? Read this paragraph and choose the correct option from the provided answers: Some processes in the body are regulated by positive feedback. Positive feedback is when a response to an event increases the likelihood of the event to continue. An example of positive feedback is milk production in nursing mothers. As the baby drinks her mother's milk, the hormone prolactin, a chemical signal, is released. The more the baby suckles, the more prolactin is released, which causes more milk to be produced. Other examples of positive feedback include contractions during childbirth. When constrictions in the uterus push a baby into the birth canal, additional contractions occur. Choices: - tissue canal - ear canal - nasal canal - birth canal A:

Ans:birth canal

Ques:Q: A penguin must do what before molting? Read this paragraph and choose the correct option from the provided answers: Choices: - hibernate - use muscle mass - mate - increase muscle mass A:

Ans:
increase muscle mass