9 Weeks

Having students wash their hands frequently with soap and water will limit the spread of infectious disease by

• protecting harmless bacterial cells.

• changing viral and bacterial nucleic acids.

• releasing mutated cells from pores.

• removing viruses and bacteria from the skin.

What is the net force applied to the sofa by the students?

• 150 N

• 200 N

• 250 N

• 400 N

Tags

NGSS.MS-PS2-2

What happens to the solar energy absorbed by plants during photosynthesis?

• It is recycled by plants and returned to the atmosphere.

• It is converted into oxygen and glucose.

• It is stored as heat within the plant for cellular functions.

• It is transformed into chemical energy.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

During the process of photosynthesis, —

• light energy is converted to chemical energy

• chemical energy is transformed to mechanical energy

• thermal energy is changed to chemical energy

• solar energy is transformed to mechanical energy

Tags

NGSS.MS-LS1-6

Analyze the energy pyramid above.

Which arrow best represents the flow of energy through living systems?

• ↪️

• ➡️

• ⬆️

• ⬇️

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What do the arrows represent in the diagram of a food chain?

• The order of size of organisms in the ecosystem

• The importance of organisms in the chain

• The direction of energy flow through organisms

• The energy increases as you move from left to right

Tags

NGSS.MS-LS2-3

Which energy transformation is taking place when an animal eats food so it can keep warm?

• Mechanical to thermal

• Mechanical to radiant

• Chemical to thermal

• Radiant to chemical

Tags

NGSS.MS-LS1-7

What is the primary reason for the change in seasons on Earth over a 9-week period?

• The tilt of Earth's axis relative to its orbit around the Sun

• The distance of Earth from the Sun

• The rotation of Earth on its axis

• The gravitational pull of the Moon

Tags

NGSS.MS-ESS1-1

Which of the following best describes the process of mitosis over a 9-week period in a rapidly growing plant?

• The plant cells divide to produce two identical daughter cells

• The plant cells merge to form a larger cell

• The plant cells undergo a reduction in chromosome number

• The plant cells remain in a resting phase

During a 9-week experiment, a student measures the growth of a plant. Which factor is most likely to affect the plant's growth rate?

• The amount of sunlight the plant receives

• The color of the pot the plant is in

• The time of day the plant is watered

• The type of music played near the plant

Tags

NGSS.MS-LS1-5

NGSS.MS-LS1-6