Questions & Answers with Solutions
Graded A+ 100% Verified (2026)
‣ What is the best explanation of how a smooth round stone became
smooth? -✓✓It was in a stream for a long time
‣ If you place bean seeds between moist paper towels and watch the
stem leaves appear you will see a demonstration of? -✓✓germination
‣ Any astronomical body that revolves around a larger body is called? -
✓✓satellite
‣ In chemistry, to be classified as an organic substance, a substance must
contain? -✓✓carbon atoms
‣ What element does not contain any neutrons? -✓✓Hydrogen
‣ What is the symbol for hydroxyl ion? -✓✓OH-
‣ A perpetual-motion machine can never be built because it is not
possible to eliminate what? -✓✓Clasticity
‣ The chemical formula of a compound describes the elements the
compound contains and the... -✓✓the ratio of elements in a compound
, ‣ When scientists measures a liquids resistance to flow, they are
measuring the liquids... -✓✓Viscosity
‣ The tympanic membranes are also known as the... -✓✓Ear drums
‣ When sodium atoms form sodium ions they: -✓✓lose electrons
‣ Choking is prevented by the...? -✓✓epiglottis covering the voice box
‣ Which of the following actions produce & chemical change? -
✓✓Adding salt to the hot water
‣ Which of the following is a non-renewable resource? -✓✓Copper
‣ What are the 2 main gases that make up stars? -✓✓Hydrogen and
helium
‣ A radar is designed to report the track of an aircraft every second. If
this radar reports 30 tracks in one minute, what percentage of the time
did the radar track the aircraft? -✓✓50%
‣ A train goes twice as fast downhill as it can go uphill, and 2/3 as fast
uphill as it can go on level ground. If it goes 120 mph downhill, how
long will it take to travel 45 miles on flat land? -✓✓1/2 hour
‣ Jamie just bought two boxes. The first box is square, with each side
measuring 10 units, and is 4 units high. The second box is rectangular
and has twice the volume of the square box. If the height of the second