Plants Respond to their Environment

An organism’s reaction to a stimulus is called a ____________

• structure

• sensation

• tendril

• response

Tags

NGSS.MS-LS1-8

Which of the following is an example of a plant responding to the stimulus of touch?

• Trees grow flowers in the spring.

• Vines coil around trees.

• Roots grow down into the soil.

• Stems and leaves grow upward.

How does a plant know what season it is?

• It knows what kind of weather each season brings.

• It knows how long each season is suppose to last.

• It senses how many hours of daylight there are.

• It senses that it must be fall when it has lost its leaves.

Raul grows seedlings near a window located on the right of the picture. How do the plants respond to light?

• Leaves close as they touch the window.

• Roots grow downward toward the soil

• Stems and leaves grow toward the light.

• Stems and leaves grow away from the light.

Tags

NGSS.MS-LS1-5

Fran wants to develop a model. The model will show how plants respond to light and gravity. Her model is pictured below. It needs arrows to show how the plant parts grow.

How could Fran BEST improve the model?

• Add an upward arrow over the roots, stem, and leaves.

• Add downward arrows over the roots, stem, and leaves.

• Add an upward arrow over the roots and a downward arrow over the stem and leaves.

• Add a downward arrow over the roots and an upward arrow over the stem and leaves.

Tags

NGSS.3-PS2-1

NGSS.4-LS1-1

Tabatha is learning about leaves in science class. She makes a poster to show how leaves change in different seasons. Tabatha lists the correct order in which leaves respond to a decrease in daylight hours. Which of the following is the correct order of steps?

• leaves make more chlorophyll -> leaves change color -> leaves fall off plant

• leaves change color -> leaves fall off plant -> leaves stop making chlorophyll

• leaves stop making chlorophyll -> leaves change color -> leaves fall off plant

• leaves make more chlorophyll -> leaves change color -> leaves stay on plant

Tags

NGSS.MS-LS1-6

______________ is an example of a stimulus.

• gravity

• light

• touch

• all of the above

Tags

NGSS.MS-LS1-8

Water is a stimulus that causes

• vines to climb up trees

• stems to grow upward

• roots to grow toward water

• tendrils to cling to building

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

What are the tendrils of a plant?

• roots that grow out towards water

• coil-like structures that cling to objects

• tiny hairs that cover some types of leaves

• parts of a stem that respond to light

When the weather is warmer, many plants...

• stop growing

• grow flowers

• lose leaves

• all of the above

Tags

NGSS.MS-LS1-5