My answers are in the brackets

Nitrogen is cycled through an ecosystem by both plants and ?(animals).

Decomposers break down dead organisms and their waste products to release
?(ammonia)

in a process called ?(nitrification)

These ?(decomposers) can then be used by plants to make amino acids. The process of converting nitrogen in the atmosphere to ammonia is called ?(nitrification)

This process is carried out by bacteria that live in ?(watery soils)
and in ?(the ground)

Plants can absorb both ?(nitrates) and
?(nitrogen gas) from the soil, but animals cannot. Animals obtain
?(nitrates) by eating plants and other organisms and then digesting the proteins they contain.

Correct!

Nitrogen is cycled through an ecosystem by both plants and animals.

Decomposers break down dead organisms and their waste products to release ammonia.

This process is called nitrification.

These decomposers can then be used by plants to make amino acids. The process of converting nitrogen in the atmosphere to ammonia is called nitrification.

This process is carried out by bacteria that live in watery soils and in the ground.

Plants can absorb both nitrates and nitrogen gas from the soil, but animals cannot. Animals obtain nitrates by eating plants and other organisms and then digesting the proteins they contain.

To answer your questions:

1. Nitrogen is cycled through an ecosystem by both plants and animals. [Animals]
Explanation: Nitrogen is an essential element that is necessary for the formation of proteins and DNA. Plants take up nitrogen from the soil and incorporate it into their tissues. Animals obtain nitrogen by consuming plants or other animals that have already absorbed nitrogen.

2. Decomposers break down dead organisms and their waste products to release ammonia. [Ammonia]
Explanation: Decomposers, such as bacteria and fungi, break down dead organic matter and waste products. During this process called decomposition, they release ammonia as a byproduct.

3. This process is called nitrification. [Nitrification]
Explanation: Nitrification is the process by which ammonia (NH3) is converted into nitrites (NO2-) and then nitrates (NO3-) by specialized bacteria. This conversion is important because nitrates are more easily absorbed by plants.

4. Decomposers can then be used by plants to make amino acids. [Decomposers]
Explanation: Decomposers play a vital role in the nitrogen cycle as they break down organic matter, releasing nitrogen compounds like ammonia. Plants can then absorb these nitrogen compounds and use them to synthesize amino acids, which are the building blocks of proteins.

5. The process of converting nitrogen in the atmosphere to ammonia is called nitrogen fixation. [Nitrification]
Explanation: Nitrogen fixation is another process in the nitrogen cycle, but it refers to the conversion of atmospheric nitrogen gas (N2) into a usable form such as ammonia (NH3) or nitrate (NO3-). Nitrification, as mentioned earlier, is the conversion of ammonia into nitrites and nitrates.

6. This process is carried out by bacteria that live in watery soils and in the ground. [Watery soils, the ground]
Explanation: Nitrogen-fixing bacteria, such as Rhizobium and Azotobacter, live in the root nodules of some plants or in the soil. These bacteria convert atmospheric nitrogen gas into a form that can be used by plants.

7. Plants can absorb both nitrates and nitrogen gas from the soil, but animals cannot. Animals obtain nitrates by eating plants and other organisms and then digesting the proteins they contain. [Nitrates, Nitrogen gas]
Explanation: Plants have specialized root structures that enable them to take up nitrates from the soil, which they use to synthesize proteins and other nitrogen-containing compounds. However, animals cannot directly absorb nitrogen from the soil. Instead, they obtain nitrogen by consuming plants or other animals, digesting the proteins they contain, and then converting them into their own tissues.