Which of these reduces friction - Answers ball bearings
When a lobster grows a claw to replace one that was lost, the process is called - Answers regeneration
Any astronomical body that revolves around a larger body is called - Answers satellite
In chemistry, to be classified as an organic substance, a substance must contain? - Answers carbon
atoms
Which element does NOT contain any neutrons - Answers Hydrogen
The chemical formula of a compound describes the elements the compound contains and the - Answers
the ratio of elements in a compound
What is the symbol for the hydroxyl ion - Answers OH-
The Tympanic membranes are also known as the - Answers Ear drum
Which of the following actions produce a chemical change - Answers adding salt to the hot water
Choking is prevented by the - Answers Epiglottis
A perpetual-motion machine can never be built because it is not possible to eliminate - Answers
elasticity
Which of the following is a renewable source - Answers
When scientist measures a liquid's resistance to flow, they are measuring the liquids - Answers Viscosity
Regeneration in man is limited to - Answers Healing of wounds
How many atoms are in a single molecule of water (H2O) - Answers 2 atoms
A student bought a sandwich for 80 cents, milk for 20 cent and pie for 30 cents. How much did the meal
cost - Answers $1.30
A radar is designed to report the track is an aircraft every semiconductor. If the radar reports 30 tracks
in one minute, what percentage of time did the radar track the aircraft? - Answers 50%
Jerry walked a dog from 6:40 a.m. to 7:30 a.m. one day. If he was paid at the rate of $6 per hour, how
much did he earn that day? - Answers $5.00
A woman is looking for a bigger square office. She finds an office twice the area of her current office. If
the perimeter of her current office is 88 feet, how many square feet is the new office? - Answers 176 sq
ft