Question

below is a data table with the average distance of objects from earth.
object average distance from earth
betelgeuse 1500 ly
sirius 8.5 ly
proxima centauri 268.770 au
dwarf planet 2 49.5 au
which of the following objects is closest to earth?
a. sirius
b. betelgeuse
c. dwarf planet 2
d. proxima centauri
while studying the electromagnetic spectrum, jonathon noticed that each type of radiation has different properties. which type of radiation has a lower frequency and longer wavelength than infrared?
a. gamma
b. ultraviolet
c. microwave
d. visible light
which statement below best describes the universe?
a. the universe contains several galaxies and many solar systems.
b. the universe contains a single giant cloud of cosmic dust and gases.
c. the universe contains the milky way galaxy, which is composed of millions of stars.
d. the universe contains billions of galaxies, each containing billions of stars, and other astronomical bodies.

Explanation:

1. Para determinar el objeto más cercano a la Tierra, comparamos las distancias. 49.5 AU de Dwarf Planet 2 es menor que 8.5 ly (Sirus), 1500 ly (Betelgeuse) y 268.770 AU (Proxima Centauri). 1 año - luz (ly) es mucho mayor que una Unidad Astronómica (AU).
2. En el espectro electromagnético, la frecuencia y la longitud de onda son inversamente proporcionales. La radiación de microondas tiene una frecuencia más baja y una longitud de onda más larga que la infrarroja.
3. El Universo contiene billones de galaxias, cada una con billones de estrellas y otros cuerpos astronómicos.

Answer:

1. C. Dwarf Planet 2
2. C. microondas
3. D. The Universe contains billions of galaxies, each containing billions of stars, and other astronomical bodies.