Mr. burns, a retired neighbor of roger's, is angry at roger for playing loud music. roger, who is 9 years old, notices that it is 10: 30 am and decides that mr. burns does not like to be interrupted while watching 'the magic donkey' superhero program on television, which only comes on during this time slot. roger decides to do an experiment over the next two weeks and record his findings. to test this hypothesis, roger could do all of the following except? a)repeat his behavior at 10: 30 am for the next two weeks and record his findings. b)bring mr. burns his mail at 10: 30 every day. c)play loud music at precisely 2: 30 in the afternoon for two weeks. d)interrupt mr. burns at 10: 30 am for the next two weeks by mowing the lawn.

What would happen to the nutrients in an ecosystem if decomposers, such as bacteria, didn’t exist there?

Which events are likely to be catastrophic to an ecosystem? select the three correct answers.a-hurricane.b-steady population growth.c-seasonal flooding.d-introducing of an aggressive invasive species.e-tsunami.

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?