A. Carrier
B. Handle
C. Wheel
D. Handler
Correct Answer: C. Wheel
The wheelbarrow’s effort arms are the handles that the person uses to lift up the heavy load in the barrow. The levers help the wheelbarrow to lift heavy loads with minimal effort. The resistance arms are located between the effort arm and the fulcrum. The wheel is the fulcrum that allows the wheelbarrow to pivot up and down.
A. Iron
B. Wood
C. Metals
D. Silver
Correct Answer: B. Wood
An auger is a drilling device, or drill bit, used for making holes in wood or in the ground. Auger bits are long and strong, which makes them ideal for boring deep holes in wood.
A. Reverse Zoonoses
B. Zoonoses
C. Anthroponosis
D. Both A and C
Correct Answer: D. Both A and C
Reverse zoonosis, also known as anthroponosis refers to pathogens reservoir in humans that are capable of being transmitted to other non-human animals.
A. Arnos
B. Chord notes
C. Ananoses
D. Zoonoses
Correct Answer: D. Zoonoses
A Zoonoses is an infectious disease caused by a pathogen (an infectious agent, including bacteria, viruses, etc) that has jumped from non-human animals (usual vertebrates) to humans. Zoonoses have different modes of transmission.
A. Gallium
B. Germanium
C. Glycogen
D. Mercury
Correct Answer: A. Gallium
Ga is the symbol Gallium. Gallium is a chemical element with the symbol Ga and atomic number 31. Elemental gallium is a soft, silvery-blue metal at standard temperature and pressure, however, in its liquid state, it becomes silvery white.
A. 5.00%
B. 27.72%
C. 46.60%
D. 52.5%
Correct Answer: B. 27.72%
Silicon makes up about 27.72% of the Earth’s crust. Silicon is the second most abundant element in Earth’s crust. Silicon is a chemical element with the symbol Si and atomic number 14. It is a hard, brittle crystalline solid with a blue-grey metallic luster, and is a tetravalent metalloid and semiconductor.
Major Elements in the Earth’s Crust
A. 5.00%
B. 27.72%
C. 46.60%
D. 52.5%
Correct Answer: C. 46.60%
Major’s element in the Earth’s crust consists of oxygen, silicon, aluminum, iron, calcium, sodium, potassium, and magnesium. Oxygen is the chemical element with the symbol O and atomic number 8.
Major Elements in the Earth’s Crust
A. 8.1%
B. 14.5%
C. 20.3%
D. 27.5%
Correct Answer: A. 8.1%
Earth’s crust consists of oxygen, silicon, aluminum, iron, calcium, sodium, potassium, and magnesium. Aluminum is a chemical element with the symbol Al and atomic number 13. It is a silvery-white, soft, non-magnetic and ductile metal.
Major Elements in the Earth’s Crust
A. Sound waves
B. Radio waves
C. Ultrasonic waves
D. Electronic waves
Correct Answer: B. Radio waves
A mobile phone has both transmitter and receiver sections. When the mobile phone is turned on, it emits radio waves that consist of radiofrequency energy, a form of electromagnetic radiation moves at the speed of light. Mobile phones communicate by transmitting radio waves through a network of fixed antennas called base stations.
A. Mercury
B. Silicon
C. Aluminum
D. Copper
Correct Answer: B. Silicon
The silicon in a solar cell has impurities meaning that other atoms are purposefully mixed in with the silicon atoms in order to improve silicon’s ability to capture the sun’s energy and convert it into electricity. The basic component of a solar cell is pure silicon, which has been used as an electrical component for decades. Currently, over 90% of the current solar cell market is based on silicon.