Question: The most abundant natural Iron oxides are:

• 1. Magnetite and Pyrite
• 2. Magnetite and Bauxite
• 3. Hematite and Pyrite
• 4. Hematite and Magnetite

Question: Which rocks are formed by the alteration of pre-existing rocks by great heat or pressure?

• 1. Igneous rocks
• 2. Sedimentary rocks
• 3. Metamorphic rocks
• 4. Acid rocks

Question: Herbicides are______?

• 1. Insect killing chemicals
• 2. Bacteria killing chemicals
• 3. Weed killing chemicals
• 4. none of these

Question: Plotting of the vibrations caused by an earthquake on a paper is called:

• 1. Seismograph
• 2. Photograph
• 3. Earthograph
• 4. None of these

Question: The substance which allows electric current to flow through it is called:

• 1. Insulators
• 2. Inductors
• 3. Conductors
• 4. None of these

Question: We can change the direction of force by____?

• 1. Gears and Pulleys
• 2. Axle
• 3. Gears
• 4. Pulleys

Question: Metals used in voltaic cell are:

• 1. Zinc and lead
• 2. Zinc and copper
• 3. Zinc and lead
• 4. Carbon and nickel

Question: In a fluorescent tube which of the following components are found?

• 1. Argon and Carbon dioxide
• 2. Helium and Oxygen
• 3. Mercury vapor
• 4. Argonne and neon

Question: For artificial insemination the semen of a bull should be stored in:

• 1. Ice
• 2. Liquid nitrogen
• 3. Cold water
• 4. Liquid Oxygen

Question: Carbon makes which of Earth's Hard Element ?

• 1. Gold
• 2. Iron
• 3. Diamond
• 4. Stone