Science 10 Worksheet Q1

What is the primary force that keeps a galaxy together? 

• Gravitational force

• Strong nuclear force

• Weak nuclear force

• Electromagnetic force

Why do distant galaxies appear to be moving away faster?

• They are being pulled away by black holes

• Space itself is expanding carrying galaxies with it

• Galaxies are exploding

• Telescopes make distant things look faster

  
  

What is the closest large galaxy to the Milky Way?

• Laniakea

• Andromeda

• Ursa Major Groups

• Virgo Cluster

What theory states that the universe began as a singularity which then rapidly expanded? 

•  Hubble’s Law,

•  Big Bang Theory,

• Multiverse Hypothesis,

• Quantum Fluctuation

Which of the following is an object that is in equilibrium?

• A bullet train running at full speed,

•  An airplane flying

• A jeepney parked on the side of the road

•  Earth revolving around the sun

This is attained when the net force or the vector sum of all the forces acting on a body or system is zero.

• Translational equilibrium

• Equilibrium

• Rotational equilibrium,

• Free-body diagram

What is the tendency to return to a state of equilibrium after a small displacement?

• Equilibrium Center of gravity

• Free-body diagram

• Stability

• Center of weight

A chair with a wide base and low height is considered stable because?

• Its weight is very light

• Its center of gravity is low and base area is wide

• Its center of gravity is high

• It has four legs instead of three.

  
  

Which statement best describes the center of gravity of an object?

•  It is the heaviest part of the object

• It is always located at the geometric center of the object

•  It is the point where the entire weight of the object may be thought to be concentrated

• It is the point where two surfaces are in contact

An object is in equilibrium if the sum of all the forces acting on it is:

• Equal to zero,

• , 

  Greater than zero,      

  
  

•  Equal to its weight

• qual to the mass of the object