What is not a possible source of error? Question 4 options:

people observe things slightly differently and can make mistakes

all answers are sources of error

measuring devices have limits, might be broken, or might be calibrated incorrectly

Lap equipment is not always identical (they can vary)

outside factors can affect te experiment (temperature, humidity, light, wind, etc.)

During which time interval does the object travel approximately 10 meters

Agroup of students is studying convection current. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other is in an area with warm air. after 10 minutes, the balloon are released from a height of 1 meter. which of the following to the students most likely observe? a) the warm balloon expands and rises. the cold balloon shrinks and sinks b) the balloon both rise. the cold balloon is larger than the warm balloon c) the cold balloon expands and rises. the warm balloon shrinks and sinks d) the balloon rise at the same rate. both balloons are the same size

What can be found in the ionosphere