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Physical Science? Am I right?

Question 22 Your friend asks you to describe pseudoscience. You reply, "Pseudoscience is a.) a part of science that involves strict research guidelines and multiple trials." b.) just like science but it does not take as much time to prove that your hypothesis is correct." c.) not anything like science because it involves strict rules and experiments." d.) something that resembles science but cannot be tested or proven using the scientific method." I think it's d. Question 23 You want to create a special device to keep coffee warm. Which type of electromagnetic wave would be most useful to investigate? a.) gamma rays b.) radio waves c.) X–rays d.) Infrared waves I think it's d. Question 24 The express train can travel 100 miles per hour. This information describes the train's a.) acceleration. b.) direction. c.) speed. d.) velocity. I think it's a. Question 25 The hybrid car uses battery power and gasoline to power the vehicle. This means that less gasoline is burned to power the vehicle. When burned, gasoline emits pollutants into the air. Evaluate the statements and choose the statement that best describes how this technology benefits the environment. a.) Electricity is cheaper than gas; hybrid cars use more electricity generated by the battery they carry. Therefore, hybrid cars will save people money in fuel costs. b.) Gasoline is a nonrenewable resource that, when burned, produces pollution that can harm the environment; therefore, because hybrid cars emit less pollution than regular cars, they do not cause as much damage to the environment. c.) Hybrid cars are becoming more popular all the time. This means that sales of hybrid cars are going up. When sales go up, this creates jobs for people in our country and beyond. d.) Hybrid cars run totally on a renewable resource. This means that as these cars become more popular, we will decrease our dependence on oil. Using less oil will reduce the amount of certain pollutants in the environment. I think it's b. Question 26 In an attempt to reduce our dependence on non–renewable resources, and cut down on the harm to the environment, we could burn ______ to produce electricity. a.) biomass b.) coal c.) natural gas d.) petroleum I think it's d. Question 27 Which statement best describes an isolated system? a.) Energy flow into and out of the system but matter is contained. b.) Energy is contained within the system and matter is exchanged. c.) Neither energy nor matter are exchanged with the surroundings. d.) There is no energy or matter that exists inside an isolated system. I think it's d. Question 28 Which question could Not be answered by using the scientific method? a.) Do minivans weigh more than cars? b.) Is it more fun to live in a different country? c.) Which soda has the most calories? d.) Why is the sky grey on cloudy days? I think it's d. Please tell me if I am right I want to get a good grade!

Asked By: - 5/5/2011
Best Answer - Chosen by Asker
22.d 23.d 24.c 25.b 26.a 27.c 28.b
Answered By: rex - 5/5/2011
Additional Answers (1)
numbers 24, 26, 27 , and 28 are wrong. I am not sure about 25, but it may be right.
Answered By: The Fuzz - 5/5/2011
 
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