What does a control group show in an experimental investigation?
Scientists are studying different jackets made for extremely cold, snowy weather. They are trying to find jackets that are warm but also thin enough to allow for natural bodily movement.Which question could the scientists answer scientifically?
Which are characteristics of scientific questions? Check all that apply.asking about subjective mattershaving a wide focus on many topicsaddressing a gap in knowledgepossibly leading to a testable hypothesisalready having fully confirmed explanations
Mutations are changes in the genes of living things. Mutations are common in all life forms and usually harmless. In fact, sometimes they help organisms survive. However, people often think that the word mutation means something dangerous.
Which is a limitation of comparative investigations?
Air pressure is measured in pascals. For a professional American football game, the ball should be inflated to about 90,000 pascals. Scientists studied the effects of air temperature on the pressure inside American footballs by taking these steps:1. Prepare 100 footballs.2. Measure each football's air pressure.3. Divide footballs into 10 groups.4. Place the groups in different lockers cooled to different air temperatures.5. After 12 hours, remove the footballs from lockers.6. Measure each football’s pressure again.7. Compare the new pressures to the starting pressures.
Scientists are investigating how well different microphones capture and record sounds. They use tools that show how loud the high and low sounds are and a tool that shows how much noise is recorded along with the actual sounds.Which is a scientific question that could be included in this investigation?
Which types of questions can most likely be answered through a scientific investigation?
Scientists are studying a group of ant colonies in the Arizona desert. Which question about the ants can be answered scientifically?
Scientists are studying fertilizers to help grass grow in southern California. Fertilizer is any substance that can be added to soil to help plants grow in it. In other words, fertilizer makes soil more fertile. The scientists set up different plots of land that all use the same type of soil and grass seed, but they use different types of fertilizer in each plot. Scientists then measure the grass growth in the different soils over time.
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