S_E_M (sun-Earth-moon) system

Front

The following diagram shows solar wind approaching Earth. The lines surrounding Earth represent Earth’s magnetic field. What effect of Earth’s magnetic field does this model best represent?

Back

Earth’s magnetic field can protect its surface from solar wind and other space weather.

Front

If Earth is 2.0 centimeters (cm) in diameter on Jackie's poster, how many centimeters away should she draw the Moon to best represent the distance between Earth and the Moon?

Back

60 cm

Front

For observers on Earth, which phase of the Moon is represented by the diagram?

Back

New moon

Front

Why is an extra day added every four years to a calendar year?

Back

The orbit of Earth is not exactly 365 days.

Front

Which position represents the autumnal equinox in the Northern Hemisphere? Options: A, B, C, D

Back

A

Front

The diagram below represents the Moon in 8 positions in its orbit around the Earth. Which position would best represent a full moon as seen from Earth?

Back

2

Front

The graph shows the average daily heights above or below sea level of high and low tides from April 15 to May 15 at the same location. Five Moon phases are indicated at the dates on which they occurred. Which conclusion is best supported by the information provided?

Back

The gravitational pull from the moon on the tides is greater during a new or full moon than a quarter moon.

Front

Which statement explains why seasons occur in the Northern and Southern Hemispheres?

Back

Earth is tilted on its axis, and each hemisphere points toward the Sun in the summer.

Front

The diameter of the Sun, Earth, and Moon are shown in the table.  Leo decides to create a scale model of the Sun, Earth, and Moon using round objects found at his house. First, he finds a large, round table cloth to represent the sun. Next, he finds a small marble to represent the Moon. 
Which object to represent Earth would best complete the scale model? Options: Any object smaller than the table cloth, Any object smaller than the table cloth but larger than the marble, An object about 2 times the size of the marble, An object about 4 times the size of the marble

Back

An object about 4 times the size of the marble