Science Quiz

The nucleus of an atom comprises:

• electrons, protons and neutrons

• electrons and protons

• protons and neutrons

The part of an atom that orbits the main core is called:

• a proton

• a neutron

• an electron

A compound is a:

• 2 or more elements mixed together

• solution of elements to form a powder

• mixture of 2 or more elements chemically bonded together

H2O can exist in:

• one state only

• two states

• three states

Latent energy may be described as the energy:

• required to heat 1 Kg of a substance by 1ºC

• contained in 1 Kg of a substance at a specific temperature

• the energy required to change the state of a substance

If a metal bar is pivoted about a point two thirds from one end and a weight of 10kg is placed on the tip of the short side, how much weight must be placed on the tip of the other end to balance the bar? (Ignoring the bars own weight.)

• 10kg

• 5kg

• 20kg

Which of the following is a scalar quantity?

• Acceleration

• Temperature

• Force

A vector has:

• size only

• direction only

• both size and direction

A moment may be described as:

• the turning effect about a point.
  

• an instantaneous transfer of momentum.

  
  

• work done about a point.

The centre of an area is called the:

• aneroid

• centroid

• frustrum