7.7 B Forces Affecting Living Things

Movement exhibited by a plant's roots towards the center of the Earth is called _____

• Centrifugal force

• Geotropism

• Gravity

• Phototropism

Geotropism is a response to _____

• Gravity

• Sunlight

• Water Pressure

• Wind

Which of the following BEST illustrates strong turgor pressure?

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Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

How are forces associated with germination and turgor pressure similar?

• Both are the result of a pushing force

• Both are the result of a pulling force

• Both are the result of gravitational force

• Both are the result of a negative force

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Which statement BEST describes the force that enables seedlings to emerge from seeds?

• The force of gravity pulls a seed upwards which causes the seed coat to split

• The force of gravity pulls a seed downwards which causes the seed coat to split

• The force caused by the absorption of water and swelling of seed splits open the seed coat

• The force caused by the removal of water shrinking of seed splits open the seed coat

Which diagram BEST illustrates turgor pressure?

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Tags

NGSS.MS-LS1-2

Which of the following statements BEST describes force?

• Force is not related to motion

• Force is only related to motion in people and animals

• Force is only related to motion in mechanical objects such as cars

• Force is related to any motion found in living or nonliving objects

Tags

NGSS.MS-PS2-2

How does negative geotropism differ from positive geotropism?

• Negative geotropism is an upward growth, while positive geotropism is a downward growth

• Negative geotropism is a downward growth, while positive geotropism is an upward growth

• Negative geotropism is a plant's response to gravity, while positive geotropism is a plant's response to sunlight.

• Negative geotropism is affected by weather, while positive geotropism is affected by sunlight.

Area A (95 wilted plants)

Area B (28 wilted plants)

Area C (32 wilted plants)

Area D (22 wilted plants)

Area E (2 wilted plants)

Area F ( 42 wilted plants)

Based on on what you know about turgor pressure and how it affects plants, what is one thing you can infer from the information.

• Plants in Area E received no rain

• Area C received most sunlight

• Area A received less rain than the other areas

• There were more wilted plants in Area B compared to Area F

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

NGSS.MS-LS2-4

An example of positive geotropism is

• Insects crawling down a stem to the roots of a plant

• Roots growing downward toward the center of Earth

• Stems growing upwards against the force of gravity

• Branches and leaves spreading out to receive energy from the Sun