The students noticed the surface they were racing on had different sized rocks on it. They wondered if the rocks being in the way would affect their race. Which explanation best describes how the rocks will affect the shopping cart?

Based on the data in the chart which two runners should the Green Team select to win the race and why?

Some students in the middle school band wondered how their instruments make different sounds. They did some investigations to find out more about sound waves, their patters, and how to model them. In the first investigation, one student filled 3 bottles with different amounts of water. the student blew across the top of each bottle. he made sure his breath was the same each time. He listened to the pitch of the sounds. The picture shows how the student set up the bottles. The data table shows the results. The "Distance Air Travels" is how far the air traveled from the top of the bottle to the bottom of the bottle.

Based on data table, what is the correct sound wave for bottle 1?

Some students in the middle school band wondered how their instruments make different sounds. They did some investigations to find out more about sound waves, their patters, and how to model them. In the first investigation, one student filled 3 bottles with different amounts of water. the student blew across the top of each bottle. he made sure his breath was the same each time. He listened to the pitch of the sounds. The picture shows how the student set up the bottles. The data table shows the results. The "Distance Air Travels" is how far the air traveled from the top of the bottle to the bottom of the bottle.

Based on data table, what is the correct sound wave for bottle 2?

Some students in the middle school band wondered how their instruments make different sounds. They did some investigations to find out more about sound waves, their patters, and how to model them. In the first investigation, one student filled 3 bottles with different amounts of water. the student blew across the top of each bottle. he made sure his breath was the same each time. He listened to the pitch of the sounds. The picture shows how the student set up the bottles. The data table shows the results. The "Distance Air Travels" is how far the air traveled from the top of the bottle to the bottom of the bottle.

Based on data table, what is the correct sound wave for bottle 3?

Which statement best explains why the students' model changes even though air is blown in the exact same way into bottles 1, 2, and 3?

How will the sound wave graph change if the student blows with more force on a bottle to make the sound louder?

The student studies the Measuring Wave Characteristics diagram to find the amplitude of the wave in the tank. The student wants to draw a line showing where the amplitude of the wave is. Based on the diagram, where should the amplitude of the wave be drawn?

The student thinks about the waves on the lake being two times higher than the day before. How could the student cause the waves in the wave tank to become two times higher?

Which diagram represents a decrease in wavelength for the original wave without a change in amplitude?

Which diagram represents an increase in frequency for the original wave with a change in amplitude?

To answer questions about Earth's history, students looked at rock samples from different layers of the ocean floor. The rock samples contained fossils of very small ocean organisms called forams. Some of the rock formed during the Cretaceous time period from 145.5 to 65.5 million years ago, before an event called the K-T extinction. The rest of the rock formed during the Tertiary time period from 65.5 to 35.4 million years ago, after the K-T extinction. In their investigation, the students measured the lengths of the foram fossils in the rock samples. The graphs show the size ranges of the foram fossils in rock samples from each time period.

Which statement is supported by the data in the two graphs?

To answer questions about Earth's history, students looked at rock samples from different layers of the ocean floor. The rock samples contained fossils of very small ocean organisms called forams. Some of the rock formed during the Cretaceous time period from 145.5 to 65.5 million years ago, before an event called the K-T extinction. The rest of the rock formed during the Tertiary time period from 65.5 to 35.4 million years ago, after the K-T extinction. In their investigation, the students measured the lengths of the foram fossils in the rock samples. The graphs show the size ranges of the foram fossils in rock samples from each time period.

Based on the information, how are the foram fossils from the two time periods different?

The students also gathered data about the number of fossilized foram species in rock layers at different heights above sea level from the Cretaceous and Tertiary time periods.

What is the most likely reason for the difference in the number of foram species in the layers from 3 to 5 meters above sea level?

The students want to make a model to compare the size of the three objects in the table.

According to the data, which model best shows the difference in sizes of the objects?

A student claims that according to the models, Titan only orbits Saturn and Saturn only orbits the Sun.

Which statement best evaluates the student's claim?

Based on the orbital models and the table, complete the following comparisons.

The gravitational force between Titan and Saturn is ________ the gravitational force between Titan and the Sun because of the ______ the interacting objects.

Based on the orbital models and the table, complete the following comparisons.

The gravitational force between Sun and Saturn is ________ the gravitational force between Titan and the Sun because of the ______ the interacting objects.

Which is the independent variable?

Which is the dependent variable?

Which is the controlled variable?

Pick the arrow to show the reaction force of the bottle at the moment of the collision.

Pick the arrow to show the reaction force of the bottle at the moment of the collision.

Which added step will provide more evidence of how the water bottle mass affects forces in the students' investigation?

The tundra is cold year-round. it has short cool summers and long, severe winters. The tundra has a permanently frozen sublayer of soil called permafrost. Like the desert, the tundra receives little precipitation, about 4 to 10 inches per year, and what does fall is usually in the form of snow or ice. It has long days during the growing season, sometimes with 24 hours of daylight, and long nights during the winter.

Which adaptations would you expect to see in plants growing in the tundra?

The thylacine is an extinct marsupial that once roamed Tasmania and Australia. There are several preserved specimens in existence. Which of the following DNA technologies offers the best chance for bringing back the thylacine?

A Goldendoodle is a dog crossbreed bred from a Golden Retriever and a Poodle. Goldendoodles were first bred by designer dog breeders in the 1990s in the United States.

Some designer breeds were bred to maximize desirable traits of certain breeds along with the desirable traits of others. Humans influence the inheritance of desired traits in organisms through selective or artificial breeding. Designer pet breeds are one example of this. Select ALL of the other examples of artificial selection.

In any population there will be variations of certain characteristics. For example, in the giraffe population there is a variation in neck lengths among individuals. Some have longer necks and some have shorter necks. Giraffes with a longer neck variations would be more likely to survive than shorter-necked giraffes in which of these situations?

The dots represent a bacterial infection. Sal was very sick with this bacterial infection. The infection was treated with antibiotics. Sal seemed to get well, but in a few weeks, she was sick again. How can this be explained using natural selection?

In 1850 there was a large snowshoe rabbit population in Manitoba, Canada. Over the years, the winter coloration (the color of the rabbit's fur) of the surviving rabbit population changed. The graph shows the change in winter coloration of rabbits between 1850 to 2000. Based on the data, we could hypothesize that

Afrikaners are a Southern African ethnic group descended from a very few Dutch settlers first arriving in the seventeenth and eighteenth centuries. The small population size of the original settlers meant that the colony probably had reduced genetic variation as well as a non-random sample of the genes from the original Dutch population. Today, the Afrikaner population has an unusually high frequency of the gene that causes Huntington's disease, a disease that causes the progressive breakdown of nerve cells.

Explain, using the principles of genetic inheritance, why Huntington's disease is common among the Afrikaners.

You find two fossils. One is a very primitive organism and the other is a complex organism. Which of these two fossils do you think is the oldest?

Geologists discovered fossil evidence of mesohippus, an ancestor of the modern horse. Mesohippus lived in North America about 40 million years ago. Mesohippus was about two feet tall, ran on hooves with three toes, and had large, grinding teeth. What statement is BEST supported by the fossil evidence.

Wendy is a paleontologist and finds a fossil of a bony fish buried in the sediment on the coast. After observing and recording several key features of the fossil as well as the area, what conclusion might she be able to make?

Fossils of a shellfish was found high on the top of a mountain. Which BEST explains how this is possible?

Based on the information in the chart, during which eon would you expect to find fossil evidence about the evolution of insects?

The information in the diagram BEST supports which hypothesis?

Ms. Garcia's science students are studying scale models. Ms. Garcia had a student blow up a balloon to 14 centimeters in diameter. This balloon is a model Sun that is approximately one ten-billionth the size of the real Sun. Consider the four circles above. Which would be the BEST size for the Earth in a scale model of the solar system?

Although Neptune is the farthest planet from the Sun, it travels in a fixed orbit around the Sun and never changes its path. What is the reason for this?

Both the Moon and the Sun influence the tides on Earth. The moon has a much greater influence though. Why is that?

While Steve is trekking in the Rocky Mountains, he realizes that he does not have a compass. He decides to find north direction at twelve noon. Which of these methods should he try?

Which location of the moon relative to the sun and earth may produce a lunar eclipse?

Julian lives in New York City. He makes a sundial by erecting a pole vertically in his garden. The given figure shows the shadow of the pole at 7 A.M. on a winter day. What can be predicted about the shadow of the same pole, at the same time, during summer?

What causes the phases of the Moon as observed from the Earth?

Ms. Garcia's science students are studying scale models. For her science project, Sarah has decided to make a scale model of the solar system. Sarah conducted some research to help her with the diameters of the planets and Sun in her model and found the table you see above. Ms. Garcia has instructed her students that a model of the solar system MUST include a Sun with a diameter of 1 meter. How does this requirement make the scale model construction difficult to complete?

Which set of magnets correctly shows the attraction of opposite poles?

Which set of magnets correctly shows like poles repelling?

Jacob floated a long steel sewing needle on a small piece of cork in a glass of water. He noticed that as he turned the glass around, the cork and needle continued to point toward his backyard. What is the MOST LIKELY reason for this occurring?

Jermaine and Lashonda each rub their dry hair with inflated balloons. Their hair is starting to stick straight out. However, the balloons will not stay next to each other, as they normally would. Instead, they spring apart in opposite directions. Explain what is causing these balloons to push each other away.

Anna learned that every magnet has a north and a south end called poles. She notices that when she puts the north end of a magnet near the south end of another magnet, they pull together. What can Anna conclude from her observation?

If the bar magnet on the left were broken in half, what statement describes how the two halves of the magnet would react with the magnet on the right?

During an experiment with electromagnets. Predict what will happen with the two electromagnets

Which would best be explained using Newton's Third Law?

Consider the four masses. Describe the motion of the masses if you used THE SAME amount of force to move each one over THE SAME time.

Which of these statements supports the idea that digital recording of audio is more reliable than analog recording?

Renaldo and Nasreen build an electromagnet by wrapping a wire around a nail and connecting the wire to both terminals of a battery. When they test the electromagnet, it can pick up 6 paper clips. Their teacher wants all groups to pick up at least 10 paper clips. What revisions could Renaldo and Nasreen make to increase the number of paper clips their electromagnet picks up?

The resultant force on the box is

The graph indicates what about the relationship between wavelength and frequency?

Based on the graph, how would you describe the net forces acting on the moving object?

This graph illustrates the change in velocity over time of an object. What conclusion can you draw about the force acting on the object?

Develop a logical argument as to why television satellites, which broadcast information as electromagnetic radiation, can send signals from the vacuum of space?

In old western movies, cowboys often would put their ear to a train track to listen for an oncoming train. What benefit would this method provide over listening for a train by listening for sound through the air?

Mr. Mann's class conducted an experiment about plant response to the presence of water. They first planted pea seeds in sand. In the beginning, they watered the seeds. Once the seeds began to grow, they reduced the amount of water they gave the plants. Instead, they placed a porous container of water close to the growing plant to see if the plant's roots would grow towards the cup of water. In science language, this plant response is called hydrotropism. An illustration of the experimental design can be seen here. Some of the students also wanted to see if the plant would grow toward the window if they withheld light. They kept their container, with the porous cup, in a dark corner, but close to a window. What comment can you make about the second group's independent or manipulated variable?

A month-long study of plant growth was conducted. Three groups of plants were grown in various amounts of light: Group A received 12 hours of light per day. Groups B & C received 8 and 4 hours of light, respectively. The average rate of growth of each group is graphed here. How does the data support the idea that ALL living things have certain basic needs in common?

Students in a science class created Eco columns to mimic a small ecosystem. Grass seeds were planted in 50 grams of potting soil, insect species were added, and 100 ml of water was administered. Which statement(s) are supported by the data in the table? Select ALL That apply.