Exam Questions & Answers 100% Pass
In scientific investigations, which of the following steps is most likely to occur first?
- forming conclusions
-posing questions
-designing an experiment
-communicating results - ANSWER-posing questions
A class of 7th-grade science students conducting an experiment involving tomato plants
collected both quantitative and qualitative data. Which data were qualitative?
-average height of the plants
-length of the stems of each plant
-number of leaves on each plant
-general appearance of the plants - ANSWER-general appearance of the plants
Evidence that supported Harry Hess's theory of seafloor spreading led scientists to
review which scientist's hypothesis of continental drift?
Evangelista Torricelli
Alfred Wegener
Joseph Louis Gay-Lussac
Auguste Piccard - ANSWER-Alfred Wegener
A scientist collects and tests the pH of water from six local ponds following major
rainstorms to determine whether rainfall increases the acidity of pond water. The most
significant flaw in the scientist's experimental design is that it is lacking
, -manipulated variables.
-a clear hypothesis.
-control data.
-a dependent variable. - ANSWER-control data.
An *anemometer* would be used in determining
-air temperature.
-relative humidity.
-wind speed.
-atmospheric pressure. - ANSWER-wind speed.
The continental crust is thickest beneath
mountains.
oceans.
valleys.
plains. - ANSWER-mountains
Which of the following types of rock is formed by the cooling and hardening of magma
or lava?
metamorphic
clastic sedimentary
igneous
organic precipitate - ANSWER-igneous
Crystals ranging in size from 2 cm to 5 cm are found embedded in rock being excavated
from a mine. The size of the crystals being excavated suggests that the rock being
excavated is a(an)