Motion
A runner completes one full lap of a track and finishes where they started; what is their displacement?
0
What equation connects net force, mass and acceleration?
F = ma
An atom has an atomic number of 12; how many protons does it contain?
12
What type of ion forms when an atom gains electrons?
Anion.
What scientific law explains why chemical equations must be balanced?
The law of conservation of mass.
Convert 72 km/h into metres per second.
20 m/s
A 5 kg object experiences a net force of 20 N; what is its acceleration?
4 m/s²
Give the electron arrangement of a neutral chlorine atom with atomic number 17.
2,8,7
What is the correct formula for the compound formed from Na⁺ and O²⁻?
Na₂O
Balance this equation: H₂ + O₂ → H₂O
2H₂ + O₂ → 2H₂O
A cyclist travels 150 m east in 30 s, then 50 m west in 10 s; what is their average velocity for the whole journey?
2.5 m/s east.
A book rests motionless on a table; name the two forces acting on the book and describe their relationship.
Weight acts downward and the normal force acts upward with equal magnitude.
An atom contains 17 protons, 17 electrons and 18 neutrons; Identify the element
Chlorine
Explain how an ionic bond forms between magnesium and chlorine.
Magnesium transfers two electrons to two chlorine atoms, forming oppositely charged ions that attract.
Balance this equation: Al + O₂ → Al₂O₃
4Al + 3O₂ → 2Al₂O₃
A velocity-time graph rises uniformly from 2 m/s to 10 m/s over 4 seconds; calculate the the displacement.
24 m
A 1200 kg car accelerates forward at 3 m/s² while experiencing 600 N of resistance; what forward driving force is produced by the engine?
4200 N
Why do elements in the same group of the periodic table tend to have similar chemical properties?
They have the same number of valence electrons and therefore react in similar ways.
Determine the formula of the compound formed from Ca²⁺ and the polyatomic ion NO₃⁻.
Ca(NO₃)₂.
Balance this equation: Ca(OH)₂ + HCl → CaCl₂ + H₂O
Ca(OH)₂ + 2HCl → CaCl₂ + 2H₂O
Light from the Sun takes approximately how long to reach Earth? Your answer must be in minutes and seconds
8min 20s
A truck collides with a small car; which vehicle experiences the greater force, and why might the car experience greater acceleration?
They experience equal and opposite forces, but the car accelerates more because it has less mass.
What element is named after the planet discovered eight years before the element itself?
Uranium was named after the planet Uranus.
What is the full name of the scientist who left gaps in his periodic table and successfully predicted the properties of undiscovered elements? (bonus points to spell it correctly)
Dmitri Mendeleev
What football-shaped molecule contains exactly 60 carbon atoms?
Buckminsterfullerene, or C₆₀