Gravity
Gravity 2
Electricity
100
A spacecraft left Earth to collect soil samples from Mars. Which statement is true about the strength of Earth’s gravity on the moving spacecraft?
A. It decreases.
B. It increases.
C. It remains the same.
D. It doesn’t affect the spacecraft.
A. It decreases.
100
Which force causes a wagon to speed up as it rolls down a hill?
A. friction
B. gravity
C. mass
D. normal
B. gravity
100
Jack tries to place magnets on his refrigerator at home, but they won’t stick. What could be the reason?
A. The body of the refrigerator isn’t made of magnetic material.
B. Earth’s magnetic field is interfering.
C. The magnet and the body of the refrigerator have like poles.
D. The refrigerator isn’t plugged into an electrical outlet.
A. The body of the refrigerator isn’t made of magnetic material.
200
Which gravitational force field diagram is drawn correctly?
200
200
Identify the area on the image where the force of attraction is the strongest.
300
A motorcycle weighs 2,009 newtons. The mass of the motorcycle is _____ kilograms. Use g = 9.8 N/kg for gravity.
205
300
Jupiter--->Venus--->Neptune--->Mars
300
Jack tries to place magnets on his refrigerator at home, but they won’t stick. What could be the reason?
A. The body of the refrigerator isn’t made of magnetic material.
B. Earth’s magnetic field is interfering.
C. The magnet and the body of the refrigerator have like poles.
D. The refrigerator isn’t plugged into an electrical outlet.
A. The body of the refrigerator isn’t made of magnetic material.
400
A car has a mass of 1,000 kilograms. The weight of the car is ______ newtons. Use g = 9.8 N/kg for gravity.
9800
400
A meteor is approaching Earth. Which statement about its motion is true?
A. The meteor travels upward relative to Earth.
B. The meteor accelerates.
C. The meteor is out of Earth’s gravitational force field.
D. The meteor falls with a constant velocity.
B. The meteor accelerates.
400
Identify the charges that are negative.
500
Will is a scientist. He’s designing a spacecraft that would allow people to land on Mars. Will’s mass on Earth is 75 kilograms.
Will knows that the gravitational pull of Mars is less than the gravitational pull of Earth. When he lands on Mars, his mass will be [equal to] [greater than] [less than] 75 kilograms. His weight on Mars will be [equal to] [greater than] [less than] his weight on Earth.
Equal to
Less than
500
Which projectiles will be visibly affected by air resistance when they fall? (select two)
- balloon
- leaf
- brick
- rock
Balloon
Leaf
500
An object that’s [negatively] [neutrally] [positively] charged has more electrons than protons. An object that’s [negatively] [neutrally] [positively] charged has fewer electrons than protons. An object that’s [negatively] [not] [positively] charged has the same number of electrons and protons.
Negatively
Positively
Not