D. Things that are kept constant.
Controls are used in an experiment where some variable is being changed. By only changing one thing and keeping the others constant they can make sure that any change in the results is caused by the variable and not the constant, since the constant didn’t change.
Answer:
I learned from recording information
- always listen attentively
- never slack off
- make sure to take notes accordingly
Answer:
this would be an analog signal as is a constant movement of sound and light waves.
Explanation:
digital signal is more of measuring current and voltage in a circuit
The answer is Speed. Speed is the the ability to move your
total body quickly from one point to another. Speed through a ladder can
indicate much about an athlete's quickness. A time of less than 2.8 seconds for
males and 3.4 seconds for females for running the length of a 20 rung ladder,
one foot in each rung at a time, is considered as excellent for senior
athletes.
There were more dark moths around factories because trees were darker near factories because of pollution. More light moths were found in the country away from the factories, in the forests with no factory pollution