Earth's Motion in Space

Which of the following is the correct hierarchical organization of the celestial bodies in the universe, from largest to smallest?

• moon, planet, star, galaxy, universe

• universe, galaxy, planet, star, moon

• universe, galaxy, sun, planet, moon

• galaxy, star, planet, moon, universe

All statements below are true EXCEPT

• Each galaxy in the universe is made of billions of stars.

• Each galaxy has solar system where sun is the star.

• The whole universe is made of billions of galaxies.

• The Milky Way is one of the billions of galaxies.

Which is one that is a NOT CORRECTLY MATCH?

• galaxy-cluster of stars orbiting around a central point

• star-ball of burning gas, mostly hydrogen and helium

• moon-the object that revolves around a planet

• Earth- the smallest planet of the solar system

What is the main cause of the periodic rise and fall of ocean tides?

• sun's gravity

• moon's gravity

• Coriolis effect

• Earth's tilted rotation

The periodic rise and fall of ocean waters is called

• tides

• Coriolis effect

• global conveyor belt

Which statement is TRUE about Earth's motion in our solar system?

• The Earth revolves around the sun; the sun revolves around the moon.

• The Earth revolves around the moon; the moon revolves around the sun

• The moon revolves around the Earth; the Earth revolves around the sun.

In ancient times, all descriptions below are CORRECT about revolutions and rotations of the Earth EXCEPT

• geocentric universe-Earth is the center of the universe

• geocentric universe-Sun is the center of the solar system

• heliocentric universe-Sun at the center of the solar system

• heliocentric model-showing elliptical orbits of planets around the Sun

What is the common effect of Earth's rotation on its axis?

• ocean currents

• plate tectonics

• day and night

• season changes

If it is summer in the Northern hemisphere,

• Earth has reached its closest point to the sun.

• it is summer in the southern hemisphere due to Earth's tilt.

• it is winter in the southern hemisphere due to Earth's tilt

Earth's rotation on its tilted axis results in

• day and night

• four seasons

• ocean tides

• moon phases