7th UIL Science I Invitational 2015-2016

All forms of energy can be converted into other forms.  The sun's radiant energy is not transformed into which of the following?

• Electrical/Thermal
• Light/Chemical
•  None of these
• All of these

Nutrients are chemical substances that organisms need.  Three important nutrient cycles are carbon, nitrogen, and phosphorous cycles.  What other element participated in these cycles by combining with these elements?

• O
• CO₂
• K
• N

Correctly fill in the missing piece of the food chain shown below
Plant--->    Grasshopper---->    mouse  ----->     snake
producer    Herbivore                   ?                     Carnivore

• Primary Consumer
• Tertiary Consumer
• Omnivore
• Decomposer

There are three common properties of organic compounds.  Which of the following is not one of those:

• They do not dissolve in water
• They have a low boing point in liquid form
• They have a high melting point in solid form
• The liquid form is nonelectrolytic

If you had two gasses in separate vials, Oxygen and Hydrogen, what chemical property would be helpful in determining the substance?

• Density
• Flammability
• Toxicity
• Color

The major food molecule, as shown, is glucose.  The series of steps where it is broken down to release energy begins with which of the following processes?

• Photosynthesis
• Respiration
• Diffusion
• Glycolysis

A force acting through a distance is considered work.  Which of the items below doesn't show work being done?

• A person standing in one spot
• A person pushing a cart
• A person lifting weights
• A person climbing up a mountain

Which best describes the energy transformation in a flashlight?

• Radiant to chemical, heat, and light
• Chemical to electrical to light
• Electrical to heat and light
• Chemical to heat to mechanical to electrical and light

The weight of an object depends on its mass and the force of gravity acting on the object.  Since the gravity on Earth's surface is 2.6 times stronger than that on Mars, how would this affect the weight of a rock it it were taken to Mars?

• Increase
• Remain constant
• Decrease

With all the rain that Texas received in the first half of 2015, flooding was widespread.  Flooding can have devastating economic consequences with the exception of

• Infrastructure
• Structural
• Cost of replacement
• Spread of diseases