8th Grade Science EOG review

A recreational lake experiences eutrophication because of excess nutrients.
Based on this information, how would the recreational lake
most likely appear?

• clear and blue
• oily and greasy
• murky and full of algae
• orange and rust-colored

Which contributes most in supporting life on the deep ocean floor?

• cold water temperatures
• extreme water pressure
• hydrothermal vents
• lack of predators

Which is a bioindicator?

• current
• insect
• rock
• water

Which area of deep ocean research provides the most economic benefit?

• hydropower
• new habitats
• oil resources
• sea-floor spreading

Which best describes the role of the water cycle?

• circulates existing water on Earth
• reduces pollution in most of the water
•  increases usable supply of Earth’s water

Which most likely causes land that water drains into to form a watershed?

• The ground is saturated or permeable.
• The ground is saturated or impermeable.
• The ground is unsaturated or permeable.

The tendency of an element to react with other elements to produce compounds. 

• Chemical change
• Neutrality
  
• Reactivity
  
• Valence 

A subatomic particle that has almost no mass and a negative charge.

• Electricity
• Proton
• Electron
  
• Neutron

A positively charged subatomic particle located in the nucleus and has an atomic mass of 1.

• Neutron
• Valence
• Proton
  
• Electron

The number of protons in the atoms of a particular element that is unique only to that element.

• Atomic Mas
• Atomic Number
  
• Proton Number
• Mole