QUIZ 3 Science: Earth and Space Section 1.4

Grace is curious about how plants in her garden get the nitrogen they need to grow. She wonders about the process by which nitrogen is moved from the air to the soil to be used by plants and then returned to the atmosphere to be used again. What is this process called?

Grace is studying biology and comes across a term that means "a nourishing substance". What word is she looking for?

Evelyn is studying how different bacteria affect the nitrogen cycle in her garden. She wants to know which type of bacteria is responsible for converting nitrates in the soil into atmospheric nitrogen. What type of bacteria should she look for?

• denitrifying (bacteria)

• nitrifying (bacteria)

• nitrogen-fixing (bacteria)

• ammonifying (bacteria)

Zoe is examining a shiny, silver material in her science class. She learns that it is made up of only one type of atom. What is the general term for such a substance?

• element

• compound

• mixture

• solution

Hannah is studying how plants get the nutrients they need to grow. She learns that certain bacteria in the soil help convert nitrogen into ammonia, nitrates, and other nitrogen compounds that plants can use. What type of bacteria is Hannah learning about?

Emma is studying materials in her science class. She comes across a substance that is made up of only one type of atom. What is the general term for this kind of substance?

Charlotte is studying the nitrogen cycle in her garden. She wants to know what type of bacteria converts nitrates in the soil into atmospheric nitrogen.

Noah is studying how certain bacteria help farmers by improving soil fertility. He learns that some bacteria convert nitrogen from the air into ammonia, nitrates, and other nitrogen compounds that plants can use. What type of bacteria is Noah learning about?

• nitrogen-fixing (bacteria)

• denitrifying (bacteria)

• photosynthetic (bacteria)

• lactic acid (bacteria)

Hannah is learning about how essential elements move through the environment. She wonders about the process by which nitrogen is moved from the air to the soil to be used by plants and then returned to the atmosphere to be used again. What is this process called?

• nitrogen cycle

• carbon cycle

• water cycle

• photosynthesis

Abigail is learning about healthy eating in her science class. Her teacher asks, "What word means 'a nourishing substance' that helps our bodies grow and stay healthy?"

• nutrient

• solvent

• mineral

• enzyme