It is the basic repeating structural unit of a crystalline solid.

True or False. All seven crystal systems are characterized by sides and angles between sides that are equal to each other.

The crystal system that is characterized by sides and angles between sides that are equal to each other.

True or False. The larger the coordination number, the tighter the atoms are packed together.

The coordination number for the simple cubic cell is _____.

The number of atoms per unit cell for a body-centered cubic crystal structure is _______

The type of crystal wherein each lattice point is occupied by a molecule

The covalent crystals are crystals in which lattice points are occupied by

The type of crystal that is a poor conductor of electricity when solid but good conductor when molten or in aqueous solutions.

Which of the following is NOT one of the two metallic bonding models?

These materials are normally not good conductor of electricity but in an elevated temperature are good conductors

True or False. All metals are solid at room temperature.

Property of metals which allows them to be drawn into wires.

True or False. Metals have low electronegativities and they tend to form cations.

It is the science and technology of extracting metals from their ores.

It is the term for process of concentrating the ore by heating the mineral in air

In the flotation process, it is the ore component that is moistened by the polar water molecules and sinks to the bottom of the tank.

It is the reduction process that is employed for most active metals.

In the electrorefining of copper, it is the electrode which acts as the cathode

It is a substance composed of large repeating numbers of reactive organic units.

A chain of two monomers form a

Which of the following is a classification of polymer based on structure?

Examples of this type of polymers are starch, natural rubber, proteins and cellulose.

Which of the following plastic resin identification code is the most recyclable?

These are polymers whose chain is not essentially composed of carbon atoms.

It is a type of polymer with chains of a single monomer chain branched with a monomer chain of a different species.

These are viscous liquid polymers that are capable of permanent hardening through phase change and wetting.

Which of the following is a characteristic of a polymer?

What resin type is usually used in pipe and tubing and pipe fittings?

Nanorods, nanowires and nanotubes are examples of _____ nanomaterials.

It is an example of a 2-D nanomaterial.

It is the science of manipulating atoms and molecules in the nanoscale.

These are semiconductor nanoparticles that are about 1-10nm in diameter.

True or False. The larger the diameter of the quantum dots, the closer its light emitted to red.

An approach in nanomaterial synthesis in which bulk solids are disassembled into finer, nanosized particles

Preparation of ultra-fine nanoparticles, nanoshells and nanotubes is possible in this type of nanomaterial synthesis

What happens to the quantum dots when they are irradiated with UV light?

No electron delocalization occurs in this nanomaterial

True or False. For solid nanoparticles, the spacing between energy levels increases as the size of the particle decreases.

It is the outermost layer of the atmosphere.

It is the form of nitrogen which can be assimilated by plants.

It is a process in the oxygen cycle which is the major mechanism by which molecular oxygen is regenerated from carbon dioxide and water.

One of the major air pollutants which is formed when nitrogen oxides and volatile organic compounds combine chemically with oxygen in sunlight.

One of the major air pollutants which is a corrosive gas that cannot be seen or smelled at low levels but can have a "rotten egg" smell at high levels. This can react in the atmosphere to form acid rain.

It is the trapping of heat near the Earth's surface by gases in the atmosphere, particularly carbon dioxide.

It is the main source of carbon dioxide emissions.

It is an international treaty that commits state parties to reduce greenhouse gas emissions.

It is a naturally occurring radioactive gas that comes out of the ground from the radioactive breakdown of uranium in soil, rock and water.

Which of the following is not a greenhouse gas?

It is the measure of all the salts dissolved in water.

This type of water contains a significant amount of dissolved minerals such as calcium and magnesium.

A process in the water cycle where water on the ground surface enters the soil.

Which of the two statement/s is/are true?

A. Water has high specific heat.

B. Water's high specific heat means large amount of heat is needed to vaporize a small amount of it

Which of the following is not a natural contaminant in water?

A pollution resulting from diffuse sources.

One of the heavy metals which is volatile and highly toxic in vapour; commonly found in fluorescent light bulbs and can cause damage to kidney, severe brain damage can cause damage to vision.

What are the two nutrients in which in excess amounts in water bodies can cause structural changes to the ecosystem.

Which of the following statement/s is/are true?

A. Dissolved oxygen can increase with an increase in water temperature.

B. Higher dissolved oxygen is obtained if waterbody is disturbed by waves.

A desalination process which uses high pressure to force saltwater through a membrane filter to remove the salt.

It is the middle and thickest layer of Earth and is composed of hot softened rock and contains iron and magnesium.

It is the removal or transport of broken rock materials away from the original site.

A type of weathering which is due to vegetation, animals or microorganisms.

What happens to the sedimentary rock when exposed to high heat and pressure?

It is the ability of the soil to provide nutrients in proper quantities and in a balanced way for the growth of plants.

It is one of the factors that results in decrease in soil fertility in which water soluble nutrients are carried to lower areas, far beyond the reach of many plant roots.

True or False. If there has been an accumulation of salts in soil, there will be decreased soil osmotic pressure allowing water to move into the plants.

What are the three main macronutrients in a chemical fertilizer?

This type of chemical fertilizer are less likely to leach and encourage more uniform growth but nutrients are not immediately available to plants.

1. Which of the following is NOT an effect of monocropping?

This type of hazards include carcinogens, toxic agents, reproductive toxins, irritants and agents that damage the lungs, skin, eyes or mucous membranes.

A. health hazard

B. physical hazard

True or False. The storage condition of chemicals can influence how it will behave and the hazards it presents.

True or False. The warning labels must include the expiration date of the chemical.

It is the lowest temperature at which a liquid will form a vapor in the air near its surface that will briefly ignite on exposure to an open flame.

A type of chemical hazard that causes visible destruction of living tissue by chemical action at the site of contact. Examples are acetic acid and sodium hydroxide.

Which of the following questions can't be answered by a Material Safety Data Sheet?

What are the two primary routes of entry for hazardous materials in a laboratory?

It is the concentration in air that kills half of the test population.

Safety goggles are used for eye protection.

True or False. There is a personal protective equipment for hearing protection.

True or False. Washing of hands thoroughly after working with hazardous materials may not be necessary if you wore gloves.