HELP ME, I HAVE TO DO THIS LIKE RIGHT AWAY CAUSE IT WAS DUE 3 DAYS AGO. Part A: Define the Problem
Despite the availability of cleaner energy sources, most of the energy used to power American
homes comes from the burning of fossil fuels such as coal and oil. The burning of fossil fuels
releases carbon dioxide into the air. Carbon dioxide is a greenhouse gas that contributes to
climate change.
Why do you think it's a challenge to reduce fossil fuel usage in homes in the United States? How
could the use of fossil fuels affect the biodiversity in neighborhoods and the surrounding
ecosystems?

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?

What’s the student’s scientific question

What factors contribute to the effect an environmental toxin has on the human body?