A scientist tests how quickly each of the following substances will settle out of water
To measure this property, she separately tests each of the following by placing 100 grams of the substance and 500 milliliters of water into a 1-liter jar with a tight lid. She then shakes the jar violently for 1 minute and places the jar on the lab table. Which one of the following would settle the fastest, creating the clearest water in the fastest amount of time? A) Gravel
B) Clay
C) Silt
D) Sand
A
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Which of the following landform definitions is CORRECT?
a. The taiga is a treeless area between the treeline and Arctic regions. b. The tundra is an area of coniferous forests. c. Permafrost areas suffer from continue drought. d. Steppes are semi-arid grasslands.
An igneous rock that can be expected to contain large (>1 mm diameter) visible grains of quartz is:
a) Gabbro b) Granite c) Basalt d) Peridotite e) Andesite
What makes light absorption in diatoms more effective than just using chlorophyll?
a. Surface-to-volume b. Microbial loop c. Frustule perforations d. Accessory pigments
Which of the following is TRUE of chlorofluorocarbons?
A) They are used in refrigeration systems. B) They have been used as propellants in spray cans. C) They are used to make foam products. D) All of the above are true.