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Unit 1

100

Protons

What is a subatomic particle, symbol p or p⁺ , with a positive electric charge of +1e elementary charge and a mass slightly less than that of a neutron?

200

Neutrons

What is a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen?

300

Nucleus 

What is the central and most important part of an object, movement, or group, forming the basis for its activity and growth?

400

Electrons

What is a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids?

500

Electron cloud

What is the system of electrons surrounding the nucleus of an atom?

Unit 2

100

Elements

What is each of more than one hundred substances that cannot be chemically interconverted or broken down into simpler substances and are primary constituents of matter?

200

Chemical formula

What is a set of chemical symbols showing the elements present in a compound and their relative proportions, and in some cases the structure of the compound?

300

Chemical symbol

 What is a one-or two-letter designation of an element?

400

Subscript

What is a subscript letter, figure, or symbol?

500

Atom

What is an extremely small amount of a thing or quality?

Unit 3

100

Newtons first law of motion

What is an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force?

200

Newtons second law of motion

What is a quantitative description of the changes that a force can produce on the motion of a body?

300

Newtons third law of motion

What is also known as the law of action and reaction?

400

Direction

What is a course along which someone or something moves?

500

Speed

What is the rate at which someone or something is able to move or operate?

Unit 4

100

Heat

What is the quality of being hot; high temperature?

200

Hot fluids

What is a heat transfer process that uses an energy source to heat water above its initial temperature?

300

Convection

What is the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat?

400

Cold fluids

What is having only running water without heat or utility services provided a cold-water flat?

500

Atmosphere 

What is the envelope of gases surrounding the earth or another planet?