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Hosted by Anna and Mary Leah General Space The Moon The Earth Bodies in Space 100 100 100 100 200 200 200 200 300 300 300 300 400 400 400 400 500 500 500 500 What is gravity? The force of attraction between two objects. Row 1, Col 1 What is an umbra? The completely dark inner area of the shadow of the Moon 1,2 What is the Aurora Borealis? The Northern Lights. 1,3 What is a star? A burning ball of gas and dust. 1,4 What is inertia? A moving object will not change its speed And direction unless acted on by another force. 2,1 What is a perigee? A point in its orbit where the moon is closest to Earth. 2,2 What is the magnetosphere? The magnetic field around the Earth. 2,3 What is a comet? A giant snowball in space. 2,4 What is the Big Bang Theory? The universe began to expand with the explosion of concentrated matter and energy, and has been expanding ever since. 3,1 What are rilles? Long valleys on the surface of the moon that show that the moon might once have had active volcanoes. 3,2 What is the vernal equinox? The beginning of spring; there is equal day and night. 3,3 What is an asteroid? Flying, irregularly shaped mountains made of rock and metal. 3,4 What is an elliptical orbit? An oval shaped revolution around a planet or sun. 4,1 What is a neap tide? When the moon and the sun are at right angles to the Earth. 4,2 What is 23 ½ degrees? The angle of the Earth’s axis. 4,3 What is a nebula? A massive cloud of dust and gas between the stars. 4,4 What is a Moon? Natural satellites that orbit planets. 5,1 What is the significance of 14.75 days? The number of days it takes the moon to pass from the full moon phase to the new moon phase. 5,2 What is the cause of the seasons? This is caused by the tilt of the axis and the revolution of the Earth. 5,3 What is a meteor? A streak of light produced by a meteoroid as it burns up in Earth’s atmosphere. 5,4