A measure of the force of gravity on an object is called ____________.

• mass

• weight

• density

• a pull or a push

You exert force when you open and close a door.

• True

• False

The tendency of an object to resist a change in motion is called__________________.

Day when the sun appears farthest north or south of the equator is called ______________.

The Southern Hemisphere receives the most sunlight of the year around June 21, on the summer solstice.

• True

• False

A ________________ is a body that orbits a planet.

The moon is Earth's only natural satellite.

• True

• False

Which of the followings are the planets visible from Earth without a telescope?

• Venus, Mars, Jupiter, Saturn

• Mercury, Venus and Mars

• Venus, Mars, Jupiter, Saturn, Uranus

• Mercury, Venus, Mars, Jupiter, Saturn

A star is mainly composed of

• Hydrogen and Oxygen

• Helium and Oxygen

• Hydrogen and Helium

• Hydrogen and Methane

The streak of light produced when a small object burns up entering Earth's atmosphere.

• a star

• a comet

• a meteor

• an asteroid