Forces and Motion
Two teams pull on a rope with the same amount of force. What happens if the rope suddenly breaks?
Both teams move backward in opposite directions.
Why can’t a person see an apple behind a sheet of paper?
Light reflects off the apple, but the paper absorbs or blocks the light.
Why does the Moon affect Earth’s tides more than the Sun?
The Moon is much closer to Earth.
Which organelle controls many cell functions?
The nucleus.
A student wants a toy truck to have more kinetic energy. What should they do?
Increase the height of the ramp.
What happens around a copper wire when electric current flows through it?
A magnetic field forms around the wire.
Why don’t solar and lunar eclipses happen every month?
The Moon’s orbit is tilted.
Which organelle converts light energy into chemical energy?
Chloroplasts.
Why does the foam inside a bicycle helmet help protect a rider’s head?
It increases the time over which the force acts, reducing injury.
How can you make an electromagnet stronger?
Add more coils or increase the electric current.
Which planet has the greatest effect on most asteroids in the solar system?
Jupiter
What happens to atoms when an organism dies?
The atoms return to the environment or other organisms.
In an experiment, a scientist changes the mass of objects dropped on a helmet. What type of variable is the mass?
Independent variable.
A student tests different wire thicknesses in an electromagnet experiment. What question are they most likely trying to answer?
Does changing wire gauge affect magnet strength?
What evidence shows that the Sun has a gravitational pull on asteroids?
Asteroids orbit around the Sun.
Birds stop migrating to an area where snakes eat them. What will most likely happen to the snake population?
The snake population will decrease.
A loud buzzer swings away from an observer. Why does the observer hear a lower pitch?
The sound waves arrive less frequently.
An electromagnet with many coils of thick wire will produce what kind of magnetic strength?
The strongest magnetic strength.
Which TWO statements are most likely true about Neptune compared to Earth?
A. Neptune has a stronger gravitational pull.
B. Neptune is closer to the Sun than Earth.
C. Neptune has more mass.
A & C
An invasive species causes songbird populations to decrease. Which organisms would most likely increase?
Bees, grains, and worms.
A scientist studies Earth, the Moon, and the Sun. They notice Earth has different seasons during the year.
What causes Earth’s seasons?
Earth’s tilted axis as it orbits the Sun.