Earth, Moon and Celestial Cycles

1. What force is most responsible for Earth’s orbit around the sun?

• Magnetic Force

• Electric Force (Electricity)

• Gravitational Force (Gravity

• Friction

Which object below does NOT exert gravity?

• Sun

• Earth

• Moon

• All objects exert gravity

How long does it take Earth to make one complete rotation around its axis?

• 1 hour

• 24 hours

• 24 hours and 50 minutes

• 29 ½ days

How does the rate of Earth’s revolution around the sun compare year after year?

• Earth’s orbital speed is progressively slowing down year after year

• Earth’s orbital speed is progressively speeding up year after year

• Earth’s orbital speed varies year to year

• Earth’s orbital speed slightly varies, but it always has and always will take Earth the same amount of time to orbit the sun

Which of the following is responsible for the lunar cycle?

• The moon’s rotation

• The moon’s revolution around Earth

• Earth's rotation

• Earth’s revolution around the sun

Which of the following is MOST responsible for the tidal cycle?

• Earth’s gravity

• The moon’s gravity

• The moon’s rotation

• The Earth’s revolution around the sun

What are shadows like during a sunrise?

• Shadows are long and point west

• Shadows are short and point west

• Shadows are long and point west

• Shadows are short and point directly south

How do stars appear to move at night?

• The move southward

• They move towards Polaris (the North Star)

• They rotate around Polaris

• Stars do not appear to move at night

At which location is Polaris NOT visible?

• The North Pole

• The South Pole

• At a mid-latitude location in the Northern hemisphere

• At the equator

Where are seasonal constellations located in relation to Earth?

• They are located far above the Earth

• They are located far below the Earth

• They are located outward (deep in space) from the Earth

• They are located between the Earth