1 of 301 of 30 Items
Question
A slice of cheese is 3.0°C and is sitting on a dish that is 3.0°C. If the dish and cheese are in a refrigerator that is set to 3.0°C, which of the following statements is true? (1 point)
Responses
Heat will not flow because there is no temperature difference between the substances.
Heat will not flow because there is no temperature difference between the substances.
The temperature of the cheese will increase and the temperature of the dish will decrease.
The temperature of the cheese will increase and the temperature of the dish will decrease.
The temperature of the air in the refrigerator will decrease and the temperature of the cheese will increase.
The temperature of the air in the refrigerator will decrease and the temperature of the cheese will increase.
Heat will flow from the air in the refrigerator to the cheese and the dish.
Heat will flow from the air in the refrigerator to the cheese and the dish.
Skip to navigation
Heat will not flow because there is no temperature difference between the substances.
Complete the following sentences by placing the correct word into the box. (1 point)
Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse.
The brightness of a star depends on how much light is released by the star and how far the star is from Earth. There are two ways to describe a star's brightness. A star's ____ area brightness is the brightness seen by humans on Earth. A star's _____ area brightness is its actual brightness and does not depend on where the star is viewed from.
Responses
Initial
Apparent
Terminal
Absolute
The brightness of a star depends on how much light is released by the star and how far the star is from Earth. There are two ways to describe a star's brightness. A star's apparent area brightness is the brightness seen by humans on Earth. A star's absolute area brightness is its actual brightness and does not depend on where the star is viewed from.
The picture below shows one cell dividing into two cells. Which of the following statements is best supported by the picture shown above?(1 point)
Responses
Both living and non-living organisms contain cells.
Both living and non-living organisms contain cells.
All organisms are multi-cellular.
All organisms are multi-cellular.
All cells come from pre-existing cells.
All cells come from pre-existing cells.
Cell division only occurs in animals.
All cells come from pre-existing cells.
Thousands of golden toads, shown below, used to occupy the tropical forests of Costa Rica. In the late 1980s, however, unusually warm weather caused many of the pools that the toads used as breeding areas to dry up. By 2004, the golden toad was listed as extinct. This example demonstrates how:(1 point)
Responses
extinction is caused by bacteria, fungi, and other infectious agents.
extinction is caused by bacteria, fungi, and other infectious agents.
extinction can be related to a failure to adapt to changes in the environment.
extinction can be related to a failure to adapt to changes in the environment.
extinction can be related to invasion by non-native species competing for resources.
extinction can be related to invasion by non-native species competing for resources.
extinction is directly related to human impact.
extinction can be related to a failure to adapt to changes in the environment.
At one time, most people believed that the Universe was static, meaning it did not change. When larger and better telescopes were invented in the early 1900s, however, it was discovered that light from objects in space shifted toward longer wavelengths. Scientists concluded that only an expanding Universe could explain this shift. Which of the following statements is supported by this example?(1 point)
Responses
Scientific knowledge can change when new evidence or interpretations arise.
Scientific knowledge can change when new evidence or interpretations arise.
The principle of the expanding Universe is a scientific law.
The principle of the expanding Universe is a scientific law.
Once a scientific theory has been accepted, it can never change.
Once a scientific theory has been accepted, it can never change.
The theory of the expanding Universe cannot change, even if new evidence arises.
Scientific knowledge can change when new evidence or interpretations arise.
The image below shows numerous volcanic mountains in the Pacific Northwest. What is the most likely cause of the volcanic and earthquake activity in this region? (1 point)
Responses
rising and falling tides in the ocean
rising and falling tides in the ocean
random abnormal weather occurrences
random abnormal weather occurrences
solar and lunar variations
solar and lunar variations
collision of tectonic plates
The most likely cause of the volcanic and earthquake activity in this region is the collision of tectonic plates.
The food web for a particular ecosystem is shown below. What would most likely happen if the grasshopper population had a major increase?(1 point)
Responses
The lizard population would not change.
The lizard population would not change.
The duck population would decrease.
The duck population would decrease.
The frog population would decrease.
The frog population would decrease.
The snake population would increase.
The snake population would increase.
Cells are the basic units of life in living organisms. Which of the following components make up cells?(1 point)
Responses
atoms and tissues
atoms and tissues
tissues and organs
tissues and organs
atoms and molecules
atoms and molecules
molecules and organs
molecules and organs
Atoms and molecules make up cells.
Kelly has a sample of an unknown substance. Which properties of the substance will be the same no matter how large or small her sample is?
(1 point)
Responses
all of these
all of these
melting point, boiling point, and mass
melting point, boiling point, and mass
melting point, boiling point, conductivity, density
melting point, boiling point, conductivity, density
melting point, boiling point, conductivity, solubility, density
melting point, boiling point, conductivity, solubility, density
Melting point, boiling point, and density will be the same no matter how large or small her sample is.
choose a answer choice
Melting point, boiling point, and density
thats not a answer choice??
I apologize for the confusion. The correct answer choice is "all of these".
Saturn's largest moon is Titan, shown below. Which of the following statements about Earth and Titan is true?
(1 point)
Responses
The gravitational force between Earth and Titan is less than that between Earth and Pluto.
The gravitational force between Earth and Titan is less than that between Earth and Pluto.
There is no gravitational force between Earth and Titan.
There is no gravitational force between Earth and Titan.
The gravitational force between Earth and Titan is more than that between Earth and Saturn.
The gravitational force between Earth and Titan is more than that between Earth and Saturn.
The gravitational force between Earth and Titan is less than that between Saturn and Titan.
The gravitational force between Earth and Titan is less than that between Saturn and Titan.
Skip to navigation
The gravitational force between Earth and Titan is less than that between Saturn and Titan.
An observational field study allows scientists to gain information about how things occur or behave in nature. In what field of science would a scientist most likely perform an observational field study on how the rate of erosion is related to the widening of a river or stream?(1 point)
Responses
chemistry
chemistry
physics
physics
geology
geology
biology
biology
Geology.
The image below shows the processes of mitosis and meiosis. How do the products of mitosis compare to the products of meiosis?
(1 point)
Responses
Mitosis produces sperm and egg cells, but meiosis produces body cells, like skin and muscle.
Mitosis produces sperm and egg cells, but meiosis produces body cells, like skin and muscle.
The cells from mitosis are a requirement of sexual reproduction, but the cells from meiosis are a requirement of asexual reproduction.
The cells from mitosis are a requirement of sexual reproduction, but the cells from meiosis are a requirement of asexual reproduction.
The cells from mitosis are identical to each other and to the parent cell, but the cells from meiosis are not identical to each other or the parent cell.
The cells from mitosis are identical to each other and to the parent cell, but the cells from meiosis are not identical to each other or the parent cell.
Mitosis produces cells with half the chromosomes of the parent cell, but meiosis produces cells with the same chromosomes as the parent cell.
The cells from mitosis are identical to each other and to the parent cell, but the cells from meiosis are not identical to each other or the parent cell.
When automobiles are designed, engineers try to maximize their fuel efficiency. Even with modern technology, today's most efficient vehicles can only attain about 30% efficiency. That means of all the chemical energy of the fuel put into an automobile, only 30% of the fuel results in car motion. Which statement best explains why this happens?(1 point)
Responses
Much of the energy is destroyed.
Much of the energy is destroyed.
Most of the energy is transformed into mass.
Most of the energy is transformed into mass.
Most of the energy becomes chemical energy.
Most of the energy becomes chemical energy.
Much of the energy is transformed into heat.
Much of the energy is transformed into heat.
In the diagram below, light from the Sun strikes a beach (Z). The beach sand gains heat then warms the air that is immediately above it (X) and the sand that is immediately below it (Y).The warm air rises and is replaced by cool air (W). Which point indicates convective heat transfer?
(1 point)
Responses
W
W
X
X
Z
Z
Y