Science UIL Practice #2

If an active cold front overtakes a warm front, which of the following occurs:

• An occluded front forms

• The front cancel each other out due to interference

• Cloud formation increases

• A stationary front forms

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NGSS.MS-ESS2-5

Which of the following stars would have the highest surface temperature?

• A Red-Orange Star

• A White Star

• A Blue Star

• A Yellow Star

After 1911, a majority of scientists accepted the theory that the nucleus of an atom was dense, small, and had an overall net charge that was positive. What led scientists to accept this theory?

• A model showed that the quantum theory of the atom was inaccurate

• Rutherford concluded his gold foil experiment

• Dalton’s theory of the atom was antiquated

• Scientists prior to the 1900’s did not use the proper scientific techniques

A student is given a container that contains crystals of sodium chloride. In order to determine the mass of the crystals, the student must know…

• The mass of the balance and the mass of the container

• The mass of the filled container and the atomic weight of sodium chloride

• The volume of the container and the atomic mass of the sodium chloride

• The mass of the empty container and the mass of the full container

An organism that uses energy to produce its food supply from inorganic compounds is called a(n)

• Heterotroph

• Consumer

• Decomposer

• Autotroph

During the drought in Texas last year, numerous deer temporarily left their usual territory to drink from water troughs that were being filled by farmers and ranchers. This behavior was probably due to:

• The need to find different food sources

• The change in an abiotic factor in their natural environment

• The need to find a new habitat

• The change in a biotic factor in their natural environment

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The predator – prey cycle can show which of the following?

• How one population can limit another population

• How certain animals maintain a mutualistic relationship

• How homeostasis helps maintain balance in nature

• How pollutants are spread throughout the food web in an environment

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NGSS.MS-LS2-3

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How can an individual tell when a chemical reaction has occurred?

• The substance changes size, shape, texture, and mass

• A new substance is formed and it would be hard to reverse

• An explosion occurs, gasses and light are given off

• The mass of the reactants is changed into another form of energy

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NGSS.MS-PS1-2

Photosynthesis is studied by both a biologist and a chemist. The biologist describes photosynthesis as a biological process, while the chemist describes it as a chemical reaction. Which scientist is correct?

• Neither, since they don’t agree, then a conclusion is not valid

• Chemist because photosynthesis has both reactants and products

• Biologist because it is a process that occurs in living cells

• Both, they use different terms but both agree on the products and reactants in the process

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NGSS.MS-LS2-3

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A student needs to crush a cube of sugar to use in a lab to test solubility rates. Which pieces of equipment would be most useful?

• Flask and Pipette

• Mortar & Pestle and Beaker

• Thermometer and Flask

• Bunsen burner and Ring stand