Solar System and Gravitational Field Strength

How many known planets are in our solar system?

• 4

• 7

• 8

• 9

What dwarf planet was downgraded from planetary status in 2006?

• Mercury

• Uranus

• Neptune

• Pluto

________is made up of a star and the planets and other space objects that revolve around it.

• star

• sun

• solar system

• asteriod

________is a large, round body that revolves around a star.

• plant

• planet

• star

• sun

What is the only planet known to contain life?

• Mars

• Jupiter

• Venus

• Earth

Which is the largest planet in our solar system?

• Sun

• Earth

• Jupiter

• Mars

Which planet is the hottest?

• Venus

• Earth

• Mercury

• Mars

Why are all the planets round in the solar system?

• They are not round.

• The planets spin and that makes them round.

• The planets are round because the gravitational field acts from the centre and pulls everything towards it

• The planets are round because they orbit the sun.

If a piece of matter changes shape, what happens to its mass?

• It increases
• It decreases
• it changes randomly
• it stays the same

Which of the following is a unit of mass?

• kilogram
• liter
• meter
• pound