a student used cubes of potato to investigate the effect of surface area and volume on the
rate of osmosis. the diagram shows two of the cubes of potato the student used.
2 cm
1 cm
1 cm
2 cm
cube 1
cube 2
the surface area to volume ratio of cube 1 is 6: 1.
(a) calculate the total surface area of cube 2.
total surface area of cube 2 =
cm2

Sally and sue were investigating the topic of friction in science. they used a small car and a ramp as seen in the picture to test what they were learning. they knew that they slipped easily on waxed floors but not on carpet, so they decided to change the material on the surface of the ramp to see what happened. they planned to use glass, carpet, aluminum foil, and sandpaper and run the car down the ramp over each surface. what would be the best research question to guide the girls' experiment? a) does the amount of surface area affect the friction on the moving car? b) will the car travel fastest on the glass surface? c) how does the angle of the ramp affect the speed of the car? d)do rougher surfaces tend to create more friction than smooth surfaces?

Which of the following best describes the relationship between glucose and complex molecules such as hormones?

When proteins are being produced by a cell, scientist say that the genes are question 2 options: activated turned off replicated deactivated