1
The sun is a huge ball of hot gases that gives off light, so it is a(n)
star
What causes the day/night cycle? (A) Earth’s axis (B) Earth’s orbit (C) Earth’s rotation (D) Earth’s revolution
C
A year is the time it takes for Earth to _______, or go around, the sun.
Revolve
Earth moves around the sun, has a nearly round shape, and has cleared its path of most debris, so it is called a(n)
planet
The path one space object takes around another is called an _________
orbit
Instead, Earth ______, or spins around its axis, once every 24 hours.
The _______ is the imaginary line that goes through Earth from pole to pole.
Axis
Which of the following is caused by Earth’s rotation? (A) phases of the moon (B) the rotation of the moon (C) seasonal changes on Earth (D) the apparent movement of the sun across the sky
D
The moon revolves around Earth, so it is Earth’s
satellite
_________ happen because different parts of Earth get different amounts of sunlight throughout the year. This causes changes in temperature and length of day
Seasons
You want to make a model of the sun, Earth, and the moon. Which objects would best represent the sun, Earth, and the moon? (A)lamp = sun; basketball = Earth; tennis ball = moon (B) lamp = moon; basketball = sun; tennis ball =Earth (C) lamp = Earth; basketball = moon; tennis ball = sun (D) lamp = moon; basketball = Earth; tennis ball = sun
A
Earth’s axis is not straight up and down. Instead, it is _______
Tilted
What angle is it tilted at: +500
Earth revolves around the sun in a _(direction)_________ orbit
Counterclockwise
Which of the following is evidence of Earth’s rotation? (A) The stars appear to rotate around the North Star. (B) The moon appears to change shape each month. (C) The seasons change throughout the year. (D) The moon stays in orbit around Earth
A
Gravitational attraction between objects depends on two things: the ________ between the objects and the _________of the objects
Distance; masses