Stimulus

The diagram illustrates a seed germinating. Many forces, including responses to moisture, light, temperature, and gravity are at work in this process.

Which of the following correctly describes two of the seedling's responses to stimuli?

• I is negative to light, and III is positive to gravity.

• IV is negative to temperature, and II is negative to gravity.

• II is negative to light, and III is positive to gravity.

• II is positive to gravity, and IV is positive to moisture.

Tags

NGSS.MS-LS1-5

Scientists on a space shuttle mission studying plant growth would probably see that the plants on the space shuttle do not grow in the same direction and pattern as those on Earth. Scientists working in space would MOST LIKELY be studying the effects of which of the following stimuli on plant growth?

• Gravity

• Oxygen

• Radiation

• Temperature

Tags

NGSS.MS-ESS1-2

NGSS.MS-LS1-5

Frank was out of town for a few days and when he returned, he noticed that his plant was very wilted. He watered the plant and put it in the sun. A few hours later, he noticed that it the leaves on the plant had perked up and looked fine again. The image shows the plants before and after the water and exposure to sunlight. Why did this occur?

• The plants needed the water to help the leaves undergo photosynthesis.

• The plants needed to be put in the sun so the sunlight could attract the plant.

• The plants needed to be outside so it could be affected by the gravity of the Earth.

• The plants needed the water so the cells could expand and keep the plant upright.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS1-6

NGSS.MS-LS2-1

The diagram illustrates a seed germinating. Many forces, including responses to moisture, temperature, and gravity are at work in this process. Which part of the seedling is demonstrating a negative response to gravity and which is showing a positive response to gravity?

• I is negative and III is positive.

• IV is negative and II is positive.

• II is negative and III is positive.

• III is negative and IV is positive.

Trees that grow in a forest tend to grow very tall, with few branches. The same species of tree grown in an open area tends to grow shorter and wider, with many branches. The stimulus responsible for these different growth patterns is the amount of —

• wind striking the tree

• light reaching the tree

• nutrients in the soil

• water in the ground

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4

What type of stimulus is the smell of pizza?

• Internal

• External

• Learned

• Instinct

Tags

NGSS.MS-LS1-8

Identify the stimulus..."A person shivers because they are cold"

• Being cold

• Shivering

A doctor taps on a patient's knee. What is the response?

• The patient kicks

• The doctor taps on the patient's knee

A driver stops the car, because she sees a red light. What was the stimulus?

• The red light

• Stopping the car

Tags

NGSS.MS-LS1-8

What type of stimulus is thirst?

• Internal

• External

• Learned

• Instinct