A student measures how different types of exercise affect heart rate after 5 minutes. What is the indepenadant, dependant, and controlled variables?
Independent: The different heart exercises
dependent: How it affects your heart after 5 minutes
control: The same person, the same starting heart rate
A student tests how the temperature of water affects the time it takes for sugar to dissolve. Find the independant, dependant, and controlled variables:
Independent: The different temperatures of water
dependent: How the temperature affects the time it takes for the sugar to dissolve.
control: Amount of water, the amount of sugar, the amount of stirring(If there is stirring)
The Variables that stay the same are______
Control variables
The variables that change in the experiment are____
Independent variables
The variables that you measure also known as the effect is the ________________
Dependent Variable
- How does the concentration of salt in water affect fish activity? if then because
If the concentration of salt in water increases, then fish activity will decrease because higher salt levels can stress fish and make them less active.
- What effect does the size of a ball have on how far it can roll down a ramp?
If the size of the ball increases, then the ball will roll farther down the ramp because larger balls may have more momentum and less friction relative to their weight.
- What effect does different pH levels in soil have on the growth of beans?
If the soil has an optimal pH level, then bean growth will be greater because plants absorb nutrients more efficiently in soil with the proper pH.
- A student wants to test whether adding weight (paper clips) to a paper airplane reduces how far it flies. They predict that adding paper clips (more weight) will decrease flight distance. The following is the data collected: a) Calculate the average distance for each weight (0, 1, and 2 clips).b) Was the hypothesis supported? Explain.
0 clips: 8.7 m 1 clip: 7.2 m 2 clips: 5.8 m
Yes, as the amount of paper clips increased, the flight distance decreased.
- A teacher wonders if background music affects how long students take to finish a puzzle. Her hypothesis is that students will take longer to finish puzzles when background music is playing. She recorded the time it took 5 students to do each puzzle twice – once with no music and once with music. The following is the data collected:
c) Suggest two improvements for this experiment.
They should have done a different puzzle (but same difficulty) in case they memorized how to complete the puzzle. The type of music playing should be the same for each student. More students should be tested.
2.5 kg to grams
2500 grams
325 cm to meters
3.25 meters
3.6L to milliliters
3600 milliliters
what is the volume of a box that is 4cm, 3cm, and 10 cm?
120 cm squared
A cube has a side length of 4m what is the volume?
4x4x4= 64m squared
65000000 in sn
6.5 x 10 to the power of 7
0.000042 in sn
4.2 x 10 to the power of -5
I=q/t Solve for t
t=q/I
D=m/v Solve for m
m= dxv
V=1xr solve for r
R=v/I
Plant height growth over time:
Line graph
