Science Exam

• Hand picking - separating the parts of a mixture by hand
• Sifting or sieving - Used to separate a dry mixture which contains substances of different sizes by passing it through a sieve, a device containing tiny holes.
• Filtration - Used when separating a solid substance from a fluid (a liquid or a gas) by passing a mixture through a porous material such as a type of filter
• Evaporation - Allowing the liquid to evaporate, leaving the soluble solid behind. 
• Threshing - is the process of separating grain from the chaff
• Winnowing - is the method in which heavier components of the mixture are separated from the lighter substances with the help of wind
• Vertebrates - animals with backbones
• Fishes - vertebrates that live in the water
• Amphibians - vertebrates that can live both in land and in water
• Reptiles - bodies covered with dry skin and hard scales
• Birds - warm blooded animals which is able to regulate body temperature
• Mammals - only group of animals with mammary glands which produce milk to nourish their young
• Invertebrates - are group of animals that do not have a backbone
• Sponges - also called poriferans, have pores all over their bodies. They are known for being the simplest form of animals
• Cnidarians - formerly known as coelenterates, can be classified into four groups: jellyfishes, corals, and sea anemones
• Flatworms - have flat and ribbonlike bodies. They feed through sucking out juices from the body of their prey
• Boundaries - it is the point where plates meet and that have created the world where we live today.
• Seismometer - is used to measure the motion of the ground during an earthquake
•  Intensity - refers to the effects of the earthquake as shown in the destruction of buildings, infrastructures, crops, as well as number of casualties
• Tectonic Earthquake - it is caused by the movement of the Earth's crust or crustal plates. It may occur above the ground or beneath the ocean.
•  Earthquake - a phenomenon which involves the shaking of the ground due to the crustal plates movement
• Charles F. Richter - an American seismologist who developed the Richter Scale which has been used as a basis for measuring the earthquake's magnitude
• Philippine Institute of Volcanology and Seismology (PHIVOLCS) - is a government agency that concern with the earthquake and volcanic eruptions in the Philippines
• Pacific Ring of Fire - It is a 25 000 miles chain of volcanoes and seismically active sites of earthquakes and volcanic eruptions
• equator - is an imaginary line that separates the northern hemisphere and the southern hemisphere of the Earth
• Wet Season - It is characterized by pronounced rainy season with thunderstorm
• Dry Season - It is characterized by hot and cloudless days.
• Intertropical Convergence Zone - known by sailors as the doldrums or the calms because of its monotonous windless weather
• ITCZ - Band of clouds found near the equator
•  Simple machines - Is any several devices with no moving parts that are used to modify motion and force in order to perform work
• Inclined plane - Is a slope that makes it easier to raise load
• Wedge - Objects with two inclined planes positioned back to back that tapers to a thin edge
• Lever - A long beam or bar that rests or turns or lifts on support or fulcrum
• Wheel and axle - made up of a circular frame (wheel) that revolves on a shaft or rod (axle)
• Screw - A long inclined plane wrapped around a shaft. A shaft is a circular cylindrical thing with a continuous winding or spiral rib
• Pulley - a wheel that carries flexible rope, cord, cable, chain, or belt on its rim
• fixed pulley - the simplest form of pulley. The wheel is fixed to one-stop and cannot be moved.
•  Moveable pulley - a type of pulley which is free to move up and down, and its one end is attached to a ceiling or other object by two lengths of the same rope.
• Effort - supporting point of the lever
• load - is the weight being moved or lifted