Electric Force
What type of charges attract each other?
Opposite Charges
If distance increases, what happens to force?
Force Decreases
What force pulls things together?
Attractive Force or attraction
Gravity is a force of _______.
Attraction
Although it is the closest planet to the Sun, this planet has a day that is longer than its year.
Mercury
What type of charges repel each other?
Like charges
If distance doubles, force becomes…?
About 1/4 as strong
Do electric forces require objects to touch?
No — they are non‑contact forces that act through a field
What two things does gravity depend on?
Mass and Distance
This is the only mammal that is physically incapable of jumping.
Elephant
If charge doubles, what happens to force?
Force Doubles
If distance triples, force becomes…?
1/9 as strong
What is the “area around a charged object where it can push or pull”?
An electric Field
Does gravity require objects to touch?
No — it is also a non‑contact force.
In ancient Rome, a week did not have 7 days, it had this many.
8 days
If charge becomes 4× bigger, what happens to the force?
Force becomes 4x stronger
Which has a bigger effect on force — charge or distance?
Distance, because force drops much faster when distance increases.
If you flip a magnet so opposite poles face each other, what happens?
They attract
If an object has more mass, how does that affect gravity?
It pulls more strongly.
This was the first ever genetically engineered organism.
Tobacco Plant
What is the term for “force increases at the same rate as charge”?
Proportional
Why is the distance–force graph curved instead of straight?
Because force doesn’t decrease steadily — it weakens faster with distance (inverse pattern).
Does flipping from attraction to repulsion change the strength rules?
No — only the direction changes, not the strength pattern.
Who is credited with the law of universal gravitation?
Isaac Newton
Originally, Amazon only sold this kind of product.
Books