8.9

Bacteria in landfills perform anaerobic respiration as they decompose materials very slowly. This process creates

• methane

• leachate

• CO2

• oxygen

In a landfill, MSW is covered with soil every day to reduce the impact of

• rats, seagulls and smells

• methane, leachate and litter

• leachate, rats and groundwater pollution

• surface water pollution and air pollution

Tags

NGSS.MS-ESS3-3

What is a cause of decreasing Total MSW?

• People or business doing Reduce, Reuse, Recycle

• People utilizing recycling methods

• Increase of bigger paper product and aluminum products

• Decrease of technology waste generation

This is a meteor crater. Which of the following is a prediction of how the crater will change over the next 1,000 years?

• The crater will become more shallow as the sides erode into the center.

• The crater will become deeper as animals make the crater home and burrow deep into the rock.

• The crater will not change over 1,000 years.

• The crater will fill in with lava.

Tags

NGSS.MS-ESS2-2

What would be the most likely way this coastline would change over time?

• fire could destroy the vegetation

• waves could erode the beach

• beach would grow due to deposition

• beach will disappear due to plate tectonics

Tags

NGSS.MS-ESS2-2

What will happen to the size of the island in the satellite image to the right over time?

• The island will get smaller as the water erodes the soil along the coast

• The island will get bigger as the water deposites the soil along the coast

• The island will stay the same

• The island will get smaller as the water covers more land

Tags

NGSS.MS-ESS2-2

If we were in a plane, Path B --> C is about the same distance as path E --> N. But, which path is the easier walk? 

• B --> C is the easier walk

• E --> N is the easier walk

• B --> C and E --> N are the same walking distance

What is the atomic number of the element with the symbol 'F'?

• 7

• 8

• 9

• 10

Which of the following elements has an atomic mass closest to 8.9?

• Beryllium

• Boron

• Carbon

• Fluorine

In the periodic table, which group contains elements with an average atomic mass of approximately 8.9?

• Group 1

• Group 2

• Group 13

• Group 14