6th Grade Science (Students) » Practice Test/Quiz Answers » Sci. Process Skills - Prac.Test|
||Sci. Process Skills - Prac.Test
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14. Keep Same (Controls): Type Fish, Amount of Food, # Fish, Environmental Conditions
Change (Independent Variable): Size of fish tank
15. Indep. Variable - Amount of cooking time; Dep Variable - Taste (Rank)
Controls - size of cookie dough ball, type of cookie dough, Temp of Oven/Cookie Sheet
Measuring tools - timer, oven (temperature)
What proving? - How does cooking time effect the taste of cookies?
Errors - Temperature of oven became warmer over time, mass of cookie dough balls were incorrectly measured, cookie sheet already used and warmed up
16. Indep. Variable - Type of waste basket; Dep Variable - # Baskets Made
Controls - Number of balls thrown, type of sporting ball used, distance thrown from, style of toss, environmental conditions
Measuring tools - ruler (measure distance thrown), tally chart (# made)
Errors - Didn't measure distance or count correctly, people might toss differently,
19. Indep.Variable - Type of ball; Dep Variable - Distance Traveled (cm)
Controls - Angle of the ramp, force used to release (stick), environment
Measuring tools - Measuring Tape (distance), protractor (measure the angle)
What Proving? - Which type of ball rolls the farthest distance at a certain angle.
Errors - Angle incorrect, problem with the release, ball roll straight down the ramp?
26. The lead ball now has a different volume (amount of space) which can drastically effect the density of an object. This change in volume will probably create a smaller density which may cause the object to float compared to when it originally sank. Just think, you can change the volume of your body in a swimming pool. If you spread yourself out on top of the water, you float becuase your volume is large compared to your mass. But if you curled up into a ball, you would sink because you've changed your volume and the overall density of your body is now greater than 1.0 g/ml. Your mass will stay the same.
26B. Beetle and Chipmunk Footprint Picture - C
27. The density of the water was changed by adding salt. This makes it more dense than before. This slight change causes the 5 eggs to float on top of the water instead of sink.
28. Willow - The wood is the least dense of all the other woods seen in the picture. As a result of this, it would be able to displace more water and hold more heavy camping equipment
30. Same Size Jars, Rocks Need to be the Same Size (Mass) , Shaking Time, Environmental Conditions. There could be other controls in this experiment as well.