Unit2 - 12D

Unit2 - 12D

Open Ended

What do you remember about the nitrogen cycle from the amoeba sisters video yesterday?

Multiple Select

Where do we find Nitrogen?

• Lakes and Marshes

• Oceans

• Atmosphere

• Organisms

• Volcanoes

Multiple Choice

78% of our atmosphere is Nitrogen, but can we access and use all of the Nitrogen?

• Yes

• No

Multiple Choice

Without the Nitrogen cycle, could we use the nitrogen in the atmosphere?

• Yes

• No

Multiple Choice

During Nitrogen fixation what does the bacteria do?

• Turn N₂ into NH₃

• Turn N₂ into NO₃

• Turn N₂ into N₃

Multiple Choice

Now that the N₂ has turned into (Ammonia) NH₃, why can't plants use it yet?

• Ammonia is toxic!

• Ammonia doesn't have enough hydrogen

Multiple Choice

Nitrification plays a big role because it takes the Ammonia (NH₃) and adds what to it so that plants can access it?

• Oxygen

• Hydrogen

• Carbon

Multiple Choice

Where does the Nitrogen go from the plants?

• Animals that eat the plants

• Into the atmosphere

Open Ended

How does Nitrogen return to soil from organisms?

Open Ended

What does the denitrifying bacteria do to the substance?

Multiple Select

How do humans impact the Nitrogen cycle?

• increase nitrogen through fertilizers

• increase nitrogen through smoke

• increase nitrogen through farm animal waste

• increase nitrogen recycling

• increase nitrogen through saving energy and using renewable engery sources

Open Ended

What do you remember about the carbon cycle from yesterday's amoeba sisters video?

Open Ended

Explain the human impact on the carbon cycle and how we can reduce it?

Multiple Choice

The nitrogen cycle is most directly dependent upon the-

• process of transpiration in autotrophs

• ability of consumers to move from place to place

• nitrogen-fixing bacteria and lightening

• evaporation of water from Earth's surface

Multiple Choice

Deforestation by burning has been described as a "double whammy" to the environment, meaning it has 2 negative impacts. Why is this description accurate?

• Deforestation increases the number of plant and animal species by destroying habitat

• Forest clearing is often followed by land development, which often leads to increased noise pollution

• Deforestation reduces the amount of oxygen in the atmosphere, which depletes the ozone layer

• Forest burning releases CO₂ while decreasing oxygen, which disrupts cycles

Multiple Choice

Q32. What is happening at 1?

• turning CO2 from the atmosphere into organic molecules

• respiration: releasing CO2

• decomposing CO2 in the soil

• photosynthesis: absorbing CO2

Multiple Choice

What converts nitrogen gas into a usable form for plants and animals?

• car exhaust

• fungi

• rain

• bacteria

Multiple Choice

What is the process of combining nitrogen gas with other elements to make nitrogen into usable compounds?

• denitrification

• ammonia

• nitrogen fixation

• nitrogen composition