Ohio EOC

A sample of bacteria was added to a culture dish containing a limited food supply. (Culture dishes are designed to help bacteria grow.) The dish was kept in an incubator for two weeks, where temperature that bacteria prefer to live in was kept constant. The graph to the right shows changes that occurred in the bacterial population over the two weeks. Which statement provides the best explanation for the population increase then decrease?

• The bacteria were unable to reproduce until day 8.

• The bacteria ate all of the available food.

• The bacteria could not grow at all in the provided temperatures.

• The bacteria could not grow at all with the provided food type.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

What is the primary function of chlorophyll in plants?

• Absorbing sunlight for photosynthesis

• Providing structural support

• Transporting water

• Releasing oxygen

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following is a chemical change?

• Melting ice

• Boiling water

• Burning wood

• Dissolving sugar in water

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the acceleration due to gravity on Earth?

Which organelle is known as the powerhouse of the cell?

• Nucleus

• Mitochondria

• Ribosome

• Endoplasmic reticulum

Tags

NGSS.MS-LS1-2

What is the chemical formula for table salt?

Tags

NGSS.MS-PS1-1

Which of the following best describes an ecosystem?

• A community of organisms interacting with their environment

• A group of the same species living in an area

• The physical environment of a single organism

• A collection of different species in a zoo

Tags

NGSS.MS-LS2-3

What is the process by which plants lose water vapor through their leaves?

• Transpiration

• Photosynthesis

• Respiration

• Condensation

Tags

NGSS.MS-LS2-1

Which of the following elements is a noble gas?

• Oxygen

• Nitrogen

• Helium

• Hydrogen

What is the pH level of pure water?

• 7

• 5

• 9

• 3