internal and external stimuli

When a seedling emerges upright from the soil, which force is it overcoming?

• Gravity
• Magnetism
• Repulsion
• Heat

Tags

NGSS.3-PS2-1

Roots grow downward in the soil in response to-

• gravity
• sunlight
• water 
• wind

Tags

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.

Tags

NGSS.MS-LS1-5

A cheetah's water levels are becoming too high, and its thirst is quenched. In response to this, the cheetah's body will send internal signals...

• Of hunger, since the cheetah needs food
• Of thirst, since all living things need water
• To sweat, so the organism can shed some of the water
• Of quenched thirst, so the organism will stop drinking water

Tags

NGSS.MS-LS1-8

Which of the following is an example of internal stimuli?

• Smelling pizza and then eating a piece of pizza
• Seeing ice cream on television and then eating a bowl of ice cream
• After working out feeling sore in your legs and then placing ice on the sore spot
• After working out seeing a bottle of water and drinking water

Tags

NGSS.MS-LS1-8

Stimulus...

• A change that prompts an action-the 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

Tags

NGSS.MS-LS1-8

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

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-LS1-3

NGSS.MS-LS2-1

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

Learning to brush your teeth when you are younger.

• learned behavior

• instinct

Tags

NGSS.MS-LS1-8