2023-2024 Fall and Spring SGO Benchmark

Which of the following statements best describes photosynthesis?

• Sugar and oxygen are turned into water and carbon dioxide
• Carbon dioxide and water are turned into sugar and oxygen
• Oxygen and carbon dioxide are turned into water and sugar
• Water and sugar are turned into oxygen and carbon dioxide.

Energy is never ______________.

• balanced
• without mass
• stationary
• created or destroyed

Aspartame is an artificial sweetener; its formula is C¹³H¹⁶N²O^5. Which element in the formula has the largest number of atoms?

• carbon

• hydrogen

• nitrogen

• oxygen

Look at the highly magnified view of water below. We call this structure a(n) ____________.

• element
• solution
• compound
• atom

I knew the correct answer to the question above because the figure shown,

• cannot be broken down

• cannot undergo a chemical reaction

• is in the simplest form

• is made of more than one type of element

Natural gas is mainly methane (CH4). What two elements are found in methane

• Carbon and oxygen
• Magnesium and oxygen
• Magnesium and hydrogen
• Carbon and hydrogen

What is sublimation?

• Change from solid to liquid to gas
• Change from solid to liquid
• Change from solid to gas
• Change from gas to solid

What is unique about dry ice compared to regular ice?

• Regular ice can keep perishables cooler longer
• The freezing point to make dry ice is higher than that to make regular ice
• Dry ice is super cooled water and regular ice cools at a slower temperature
• Dry ice sublimates and skips the liquid phase change

Ozone (O3) is an example of a(n) _________

• atom
• compound
• molecule
• compound and molecule

A glass of cold milk sometimes forms a coat of water on the outside of the glass (often referred to as “sweat”). How does the water get on the outside of the glass?

• Water evaporates from the milk and condenses on the outside of the glass.
• The glass acts like a semi-permeable membrane and allows the water to pass, but not the milk.
• Water vapor condenses from the air.
• The coldness causes oxygen and hydrogen from the air combine on the glass forming water.