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Course: Alhussan Physics — Stage 7
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Alhussan Physics — Stage 7

Chapter 1: Energy

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Chapter 2: Forces

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Chapter 3: Sound

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Chapter 4: Electricity

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Chapter 5: The Earth in Space

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Quiz

Physics 2.3 How ‘old’ is gravity? — Quiz

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  • Questions count: 50
  • Passing grade: B+
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1.
Feather took 3.0 s and ball 0.6 s in air. How many times longer for the feather?
5.0 times
3.6 times
2.4 times
0.2 times
2.
What keeps the Moon in orbit around the Earth?
Magnetism
Friction
Gravity
Air resistance
3.
Which term matches this definition? “Noticing with the senses.”
Newton
Observation
Weight
Fluid
4.
Which term matches this definition? “Every mass attracts every other mass.”
Non-contact force
Drag
Universal gravitation
Fluid
5.
Which is the correct definition of “Model”?
Falling with only gravity acting.
Orbit matching Earth's rotation.
Shaped to reduce drag.
Simplified explanation of how something works.
6.
Which statement is NOT correct?
Aristotle ignored air resistance.
Newton said gravity acts only on Earth.
Aristotle lived in the 4th century BC.
Newton said gravity acts between all masses.
7.
Distance rolled down a slope in equal times (Galileo). Calculate the percentage change in "Total distance (units)" from 1 to 5.
Dr Dabour Hub Academy - figure 1
3200%
3300%
97%
−3200%
8.
Galileo's distance grows as time². After 6 intervals, distance (1 unit after 1)?
6 units
36 units
7 units
12 units
9.
Which is the correct definition of “Vacuum”?
Liquid or gas.
Space with no air.
Orbit matching Earth's rotation.
Person who travels in space.
10.
Which statement is NOT correct?
Galileo measured time with water clocks.
Galileo rolled balls down slopes.
Galileo said objects fall at the same rate without air resistance.
The Moon has air.
11.
Which is the correct definition of “Newton”?
Unit of mass.
Explained gravity as a universal force.
Force keeping planets in orbit.
Shape of the object.
12.
A feather falls slowly because of ____.
magnetism
low gravity
its colour
air resistance
13.
How many years between Aristotle (about 350 BC) and Galileo (1600 AD)?
1950 years
1600 years
350 years
1250 years
14.
True or false? Aristotle's ideas lasted nearly two thousand years.
True
False
15.
Distance rolled down a slope in equal times (Galileo). Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 2
A
B
C
D
16.
Which statement is NOT correct?
Heavy objects always fall faster in a vacuum.
Newton's gravity explains the Moon's orbit.
Einstein later improved Newton's theory with general relativity.
Aristotle's ideas lasted nearly two thousand years.
17.
Which statement is NOT correct?
A feather falls slowly because of air resistance.
Aristotle did controlled experiments.
Aristotle used observation without measurement.
The Moon has no air.
18.
True or false? Heavy objects always fall faster in a vacuum.
True
False
19.
Which term matches this definition? “Well-tested explanation.”
Theory
Parachute
Newton
Controlled experiment
20.
Which statement is NOT correct?
Newton's gravity explains the Moon's orbit.
Gravity gets weaker with distance.
Galileo agreed with Aristotle.
Aristotle believed heavy objects fall faster.
21.
A ball falls 45 m in 1 s. Mean speed?
450.0 m/s
46.0 m/s
45.0 m/s
4.5 m/s
22.
True or false? Aristotle's ideas were accepted for nearly two thousand years.
True
False
23.
Time to fall 2 m for objects in air. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 3
A
B
C
D
24.
Which is the correct definition of “Controlled experiment”?
Noticing with the senses.
Amount of matter, in kilograms.
Test changing one variable.
Weight equation.
25.
True or false? Gravity gets stronger with distance.
True
False
26.
Einstein later improved Newton's theory with ____.
plate tectonics
atoms
general relativity
evolution
27.
A hammer and feather fell together on the ____.
Sun
Moon
ocean
Earth's surface
28.
Aristotle used observation without ____.
thinking
measurement
writing
eyes
29.
Which term matches this definition? “Explained gravity as a universal force.”
Newton
Air resistance
Teardrop shape
Fair test
30.
Distance rolled down a slope in equal times (Galileo). Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 4
A
B
C
D
31.
True or false? Science ideas never change.
True
False
32.
The Moon has no ____.
air
gravity
rocks
mass
33.
Distance rolled down a slope in equal times (Galileo). What is the value of "Total distance (units)" when "Time interval" is 2?
Dr Dabour Hub Academy - figure 5
4
25
16
1
34.
A ball falls 2 m in 0.63 s. Mean speed?
3.2 m/s
0.3 m/s
2.6 m/s
1.3 m/s
35.
Feather took 2.5 s and ball 0.6 s in air. How many times longer for the feather?
3.1 times
0.2 times
4.2 times
1.9 times
36.
Which statement is NOT correct?
Galileo measured time with water clocks.
Newton published his theory of gravity in 1687.
Gravity gets stronger with distance.
Aristotle believed heavy objects fall faster.
37.
Years each idea was accepted. What is the value for Newton (until Einstein)?
Dr Dabour Hub Academy - figure 6
106
627
1876
208
38.
Good science uses ____.
opinions
tradition
authority
controlled experiments
39.
Which statement is correct?
Newton published in 1987.
Heavy objects always fall faster in a vacuum.
Newton said gravity acts only on Earth.
Science ideas change with new evidence.
40.
Science ideas change with new ____.
evidence
fashions
votes
leaders
41.
The graph shows a stone and a feather falling in a vacuum tube. What does it show?
Dr Dabour Hub Academy - figure 7
The feather falls faster
The stone falls faster
Without air, they fall at the same rate
Neither falls
42.
True or false? Aristotle lived in the 4th century BC.
True
False
43.
Years each idea was accepted. About how many times bigger is Aristotle than Newton (until Einstein)?
Dr Dabour Hub Academy - figure 8
13.0
8.7
17.4
4.3
44.
Years each idea was accepted. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 9
A
B
C
D
45.
Time to fall 2 m in a vacuum tube. What is the value for Feather?
Dr Dabour Hub Academy - figure 10
3.31
0.63
2.31
2.89
46.
Which term matches this definition? “Test changing one variable.”
Newton
Direction of motion
Controlled experiment
Newton meter
47.
A ball falls 20 m in 3 s. Mean speed?
6.7 m/s
0.1 m/s
23.0 m/s
60.0 m/s
48.
Years each idea was accepted. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 11
A
B
C
D
49.
Time to fall 2 m for objects in air. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 12
A
B
C
D
50.
Galileo measured ____ with water clocks.
smell
time
colour
mass only
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Part of Chapter 2: Forces — see every lesson and quiz in this unit.
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