Spring Semester Exam Review part 2
Quiz by TIFFANY SOLOT
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- Q1
What does it mean if your hypothesis does not match your results? If a scientific investigation results in an unexpected conclusion, was it a waste of time? Why or Why not?
It means that you should change your prediction to match the results
It doesn't mean anything
It means that your prediction was not supported or proven by the results. This is not a waste of time. This can lead scientists to develop a new hypothesis to test in additional experiments, leading to new discoveries.
It means that you did the experiment incorrectly
30s - Q2
Elements in the same _____ (vertical column) have similar properties.
row
period
level
group
30s - Q3
What would be the atomic number of Hydrogen-3?
Hydrogen's atomic number is 2
Hydrogen's atomic number is 3
Hydrogen's atomic number is 1
Hydrogen's atomic number is 0
30s - Q4
A rocket is shown above. Which of Newton's laws explains how the rocket moves when launched?
Newton's 2nd Law states that force = mass x acceleration
None of Newton's laws explain how the rocket moves
Newton's 1st law states that an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
Newton's 3rd law states that for every action there is an equal and opposite reaction. The gas and flame pushing down and away from the rocket propels the rocket up.
30s - Q5
What force are you trying to use with your new basketball shoes?
Air resistance
Gravity
Friction
Balanced forces
30s - Q6
At which point(s) on the diagram above will the roller coaster have the least kinetic energy?
Position A & D
Position A & C
Position B & C
Position B & D
30s - Q7
What is car C's average speed?
.8 km/sec
1.33 m/sec
1.25 m/sec
.8 m/sec
30s - Q8
If 2 vehicles are moving with a force of 100 N, which vehicle would have the most acceleration, the car or the 18-wheeler? Why?
The 18-wheeler, because it has more mass.
The car, because it has more force.
The car, because it has less mass.
The 18-wheeler, because it has more force.
30s - Q9
A swimmer swims the 400 m freestyle in 2.5 minutes with a force of 50 Newtons. How much work did he do?
W=FxD W= 50N x 400m W= 2000 Joules
W=D/F W= 400m / 50N W= 8 Joules
W = D/T W= 400m / 2.5 mins = 160 Newtons
W=FxD W= 50N x 400m W= 2000 Newtons
30s - Q10
What is plate tectonics?
States that all land forms are the result of plate movement
States that Earth's surface is made up of giant, moving slabs called tectonic plates
States that sea floor spreading is causing the Earth to get larger
States that the Earth's crust is all one large piece
30s - Q11
How many atoms of each element in 2HC2H3O2?
H - 8, C - 4, O - 4
H - 6, C - 4, O - 4
H - 5, C - 2, O - 2
H - 2, C - 6, O - 4
30s - Q12
Why is hydrogen in group one and why is it like the halogens?
Hydrogen is not in group one and is not like the halogens!
Hydrogen has only 1 valence electron like group 1. Hydrogen is like the halogens because it only needs one additional electron to complete its outer level
Halogen is a nonmetal
Hydrogen has a complete set of valence electrons and is not reactive
30s - Q13
What forces caused the free thrown ball to slow down and fall short of making a basket?
Balanced Forces
Applied Force
Gravity and air resistance
Friction
30s - Q14
Using the chart above, if an unknown substance has a mass of 79.9g and a volume of 25.7 cm3, what is the unknown substance?
Potassium
Bromine
Krypton
Sulfur
30s - Q15
What did sea-floor spreading provide explanation for?
The formation of folded and volcanic mountains
The location of the Ring of Fire
Provided explanation for continental drift
Provided explanation for why earthquakes occur
30s
