Question : What are the components of the nucleus of an atom?

Option 1: Only protons

Option 2: Protons and neutrons

Option 3: Neutrons and electrons

Option 4: Only neutrons

Question : Cathode rays are a beams of:

Option 1: Neutrons

Option 2: Protons

Option 3: Positrons

Option 4: Electrons

Question : In nuclear reactors, moderators are used to?

Option 1: Accelerate neutrons

Option 2: Absorb the neutrons

Option 3: Slow down the neutrons.

Option 4: Generate neutrons

Question : What are the imaginary lines encircling the Earth horizontally called?

Option 1: Latitudes

Option 2: Longitudes

Option 3: Isobars

Option 4: Isotherms

Question : In an ecosystem, the vertical distribution of different species occupying different levels is called ____________.

Option 1: levelling

Option 2: grouping

Option 3: ramification

Option 4: stratification