Physical Science Set 2

Only about 50% of the solar energy directed toward Earth penetrates directly to the surface. What happens to the rest of the radiation? 

• a.It is absorbed or reflected by the atmosphere.

• b.It loses energy traveling through space. 

• c.It is reflected off the Moon and back into space. 

• d.It loses energy overcoming the Sun’s gravity.

Which of the following provides evidence for plate tectonics? 

• a.Sea floor topography

• b.Ocean currents

• c.Coriolis effect

• d.Atmospheric pressure

Pangaea is the name of a former continent that included: 

• a.All the continents

• b.Only Europe and Asia

• c.Only South America and Africa

• d.Only North and South America

Which of the following is not true about equilibrium? 

• a.If the equilibrium constant is greater than 1, the forward reaction is favoured.

• b.If the equilibrium constant is less than 1, the backward reaction is favoured. 

• c.Equilibrium can only be reached in a closed system.

• d.Equilibrium can only be reached in an open system.

How many neutrons does a Chlorine atom have? The atomic number of Chlorine is 17. The mass number is 37. 

• a.54

• b.17

• c.20

• d.37

It is the center of an atom, where all protons and neutrons are found. Which of the following is being described? 

• a.Nucleus

• b.Electron

• c.Atomic radii

• d.Electron affinity

What information can be taken from the atomic number of an element? 

• a.The number of neutrons

• b.The number of protons

• c.The number of electrons

• d.Both b and c.

Which of the following is the other name for the isotope Hydrogen-2?

• a.Hydrogen

• b.Hydroxide

• c.Deuterium

• d.Tritium

What is the total number of valence electrons in an atom of Boron in the ground state?

• a.1

• b.3

• c.5

• d.7

What is the most electronegative element?

• a.Hydrogen

• b.Neon

• c.Francium

• d.Fluorine