Essential 3 and 4

One complete rotation of the moon takes about one —

• hour

• day

• month

• year

A lunar eclipse occurs when the Earth passes between the Moon and the Sun, however a solar eclipse occurs when —

• the Moon passes between the Earth and the Sun

• the Sun passes between the Earth and the Moon 

• the Earth passes between the Moon and the stars

• the Moon passes between the stars and the Earth

Study the images of the phases of the moon. Which of the following statements explains the pattern seen in the phases of the moon?

• The visible part of the moon that is seen each night grows larger when it is waning.

• The visible part of the moon that is seen each night grows smaller after the new moon and larger after the full moon.

• The visible part of the moon that is seen each night grows smaller when it is waxing.

• The visible part of the moon that is seen each night grows larger after the new moon and smaller after the full moon.

Which statements explain why planets closer to the Sun are terrestrial rather than gaseous in nature?

• Frequent collisions prevented the planets from growing large.

• Nebular gasses could not accumulate and condense in the close proximity of the Sun due to its low temperature.

• There was insufficient gravity around the inner planets to capture gases such as hydrogen and helium.

• Only heavy elements with high densities and melting points could condense under gravity to form terrestrial planets.

The image shows the position of the Sun, the Moon, and the Earth during new moon and full moon phases. Which statements about the relative positions of the Sun, the Moon, and the Earth during these phases are correct? 

• During a full moon, Earth is between the Moon and the Sun.

• During a full moon and a new moon, Earth, the Moon, and the Sun don’t lie on the same line.

• During a new moon, Earth is at a lower position than the Moon and the Sun.

• During a new moon, the Moon is at a higher position than Earth and the Sun.

The image shows various phases of the moon as seen from Earth. What can be the reason for the moon's shape changing during different phases?

• The moon spins on its axis.

• The moon varies the amount of light it produces.

• The moon revolves around Earth.

• The moon grows and shrinks in shape.

The gravity of Earth is six times greater than that of the Moon. Based on the difference in gravity, which statement is true about the mass and weight of an object?

• The mass and weight of an object will be the same on the Moon.

• The mass of an object will be the same on Earth and on the Moon.

• The weight of an object will be less on Earth than on the Moon.

• The weight of an object will be the same on the Moon than on Earth.

A teacher shows her students a picture of the different phases of the Moon. How does this information help the students better understand the phenomenon of moon phases?

• Demonstrates revolution of the Moon around the Sun

• Different portions of the Moon are seen in each phase

• Shows surface composition of the Moon

• The amount of light reflected by the Moon does not change

8. Which space exploration device has provided the best understanding of the universe?

• Viking -2

• Hubble Space Telescope

• Sputnik

• Keyhole - 9

Which phase of the moon is known as a “half moon”?

• New moon

• Last Quarter

• Waning Gibbous

• Waxing Crescent