YEAR 7 CHEMISTRY 2ND TERM EXAM

The word “atom” means

• Indestructible

• Indivisible

• Very small

• Invisible

Identify the material that matches these descriptions: you cannot see through it; it bends and when placed in a circuit it makes a lamp light up.

• Glass

• Wire

• Cloth

• Plastic

One of these is a material that do not allow light to pass through them at all is said to be _________

• Plain glass

• Brick wall

• reading glasses

• Waterlucent

All of the following are luminous material, EXCEPT

• Sun

• Star

• Touch light

• Moon

Which of these statements about elements is true?

• An element is made from simpler substances

• An element can be split into simpler substances by chemical reactions

• An element is split into simpler substances by physical processes

• An element cannot be split up into simpler substances by chemical reactions

Identify the chemical symbol for chlorine.

• Cl

• Ar

• B

• H

Identify the chemical symbol for Potassium.

• P

• K

• Cl

• S

Identify the chemical symbol for sodium.

• Na

• Ne

• S

• Ca

The substances that take part in a chemical reaction are called ______

• Chemicals

• Products

• Reactants

• Compound

The substances that form as a result of the chemical reaction are called ____

• Chemicals

• Products

• Reactants

• Compound