Internal and external stimuli

Jackson is around his friend who is constantly sick. Jackson begins coughing and sneezing the next day at school. What is the possible stimulus and response?

• Internal stimulus is coughing, the response is getting sick
• External stimulus is coughing, the response is getting sick
• Internal stimulus is germs/bacteria, the response is coughing
• External stimulus is germs/bacteria, the response is coughing

Tags

NGSS.MS-LS1-8

As the season turns from winter to spring, what is the most likely response that a bear's body has to the changing season?

• The bear stores more body fat to maintain the necessary body heat and more nutrition because there may be less prey.
• The bear produces less fur and begins shedding to allow its body temperature to adjust the warming climates
• The bear's fur becomes darker so it is easier to hide from its prey
• The bear begins to store food and find shelter for hibernation

Tags

NGSS.MS-LS2-1

Which of the following best explains the external stimulus that is causing the response in the picture?

• The tree, stimulated by the weather, is responding by growing towards the sky
• The tree, stimulated by the sunlight, is responding by growing towards the sun
• The tree, stimulated by the piano, is responding by growing through the piano.
• The tree, stimulated by the lack of water, is responding by growing at a slower rate

Tags

NGSS.MS-LS1-5

Many birds migrate long distances when the seasons change. Which of the following is an environmental stimulus that would signal to the birds the changing seasons?

• Changes in the length of daylight
• Increases in the population of edible plants
• Decreased number of offspring per hatching event
• Increase in annual precipitation levels

Tags

NGSS.MS-ESS1-1

Homeostasis...

• A stimulus from inside an organism
• How an organism reacts to a change
• The ability to maintain a stable internal environment (type of equilibrium or balance)
• A stimulus from outside an organism

Tags

NGSS.HS-LS1-3

Stimulus...

• A change that prompts an action-then cause

• The ability to maintain a stable internal environment (type of equilibrium or balance)

• How an organism reacts to a change and results in a change in behavior- the effect

• Constant and balanced environment

Roots grow downward in the soil in response to-

• gravity
• sunlight
• water 
• wind

Tags

NGSS.4-LS1-1

NGSS.5-PS2-1

Geotropism is a force that affects certain organisms.  Which of the following is an example of a plant responding to the external stimulus of gravity?

• A seedling growing towards a sunny window.
• Plant roots growing down into the soil.
• Flowers producing nectar to attract bees.
• A potted plant wilting when it dries out.

When a plant wilts due to a drought, it is responding to which of the following internal stimuli?

• Decreased water pressure within the plant cells.
• lack of nutrients carried by water in the plant.
• Decreased rate of photosynthesis in the stem.
• Increased storage of glucose in the leaves.

Tags

NGSS.MS-LS1-5

The skin helps regulate body temperature. When your body becomes too warm you...

• Sweat
• Blink
• Shiver
• Yawn