What is the main function of the large central vacuole in a plant cell?

It protects the cell from the surrounding environment.

Sharee had been ill for three days. When her mother took her to the doctor, the doctor decided not to prescribe an antibiotic. He said Sharee had a virus. Why are antibiotics not able to cure viral infections?

Antibiotics kill bacteria, not viruses.

Antibiotics target only white blood cells.

Antibiotics are not used to fight any infections.

Antibiotics cause fevers that make viruses stronger.

Which of the following statements correctly identifies the general characteristics of organisms in a domain?

Domain Archaea includes single-celled organisms that can be found in hot springs and thermal vents.

Domain Eukarya includes single-celled organisms that lack nuclei.

Domain Bacteria includes multicellular organisms that make their own food.

Domain Protista includes single-celled and simple multicellular organisms that have plant-like or animal-like characteristics.

Which statement explains why scientists classify organisms into groups based on shared characteristics?

Classification helps scientists understand the relationships between different species.

Classification helps scientists understand how the parts of a cell work together.

Classification helps scientists understand the chemical reactions that are necessary for organisms to live.

Classification helps scientists understand how ecosystems can be organized into levels of complexity.

What statement explains the relationship between a scientific theory and evidence collected about the theory?

theories are guesses, so evidence does not matter

Scientists hypothesize that manatees travel generally south in winter to stay in warm water. The map below shows migration patterns observed for the Florida manatee. According to the map, finding manatees in which area during January would give the greatest evidence to support this hypothesis?

between Tampa, Florida and Jacksonville, Florida

between Mobile, Alabama and Pensacola, Florida

between Savannah, Georgia and WIlmington, North Carolina

between Jacksonville, Florida and Myrtle Beach, South Carolina

Which of the following describes a contact force?

Earth and the moon pull on each other

a ball’s weight makes it fall

a magnet holds a picture to a refrigerator

How does the mass of an object affect the force of gravity experienced by the object?

The force of gravity increases as mass increases.

The force of gravity decreases as mass increases.

The force of gravity is the same for all objects because acceleration is the same.

The force of gravity is the same for all objects because the force is determined by Earth’s mass.

The graph below shows the distance a car traveled over 5 seconds while moving on a freeway. Which statement correctly describes the motion of the car?

Moving forward at a constant speed.

Moving forward and accelerating.

Moving uphill at a constant speed.

Moving uphill and accelerating.

Declan observed a rock that he found at the beach. The rock felt hard, it was yellow, and it appeared to be made of layers. Declan concluded that the rock was sedimentary. Which observation best supports this conclusion?

the location where the rock was found

What must happen in order for a metamorphic rock to be transformed into an igneous rock?

It must be pulled under Earth's crust, melted, and forced out above the crust to cool.

It must be compressed by high temperatures and pressure within Earth's crust.

It must be soaked in water until it dissolves and reforms in a different shape.

It must be weathered into sand grains and compressed into multiple layers.

The figure below shows part of what scientists think is happening in Earth’s mantle. What process does the figure show occurring in the mantle?

Hot rock expands, becomes less dense, and rises toward the surface of Earth.

Hot rock expands, becomes more dense, and rises toward the surface of Earth.

Hot rock becomes less dense and moves towards the outer core.

Hot rock becomes more dense and moves towards the lithosphere.

During the year 2003, the number of earthquakes that occurred were higher than usual. The map below shows the locations of some of these earthquakes. Why do the dots on the map tend to form a long curving line in the western part of the Pacific Ocean?

That part of the ocean is directly above the boundaries between tectonic plates.

This part of the ocean has a high rate of hurricanes and typhoons.

An increase in the number of tsunamis in the Pacific led to an increase in the number of earthquakes.

There is pressure on the seafloor due to the weight of water of the Pacific Ocean.

The house sparrow was first introduced to New York in 1851. It is now distributed across most of North America. As the species expanded its range, it began to live in environments that were different from its original habitat. The birds now vary in size, depending on their geographic location. The map shows the distribution of house sparrows by size. What is the most likely explanation for the body-size distribution of house sparrows shown on the map?

Cold temperatures in the North favored the survival of populations of larger sparrows over populations of smaller sparrows.

High elevations in the West provided a survival advantage for populations of larger sparrows over populations of smaller sparrows.

Warm temperatures in the South allowed populations of larger sparrows to survive over populations of smaller sparrows.

Coastal environments in the East tended to give a survival advantage to populations of larger sparrows over populations of smaller sparrows

Scientists have discovered that a type of shark called a hammerhead shark can reproduce asexually. How does this type of reproduction give the hammerhead shark an advantage?

It allows hammerhead sharks to reproduce without investing energy in finding a mate.

It increases the genetic diversity of the hammerhead shark species.

It requires two parents and produces hammerhead offspring genetically different from each other.

It gives hammerhead sharks a better chance of surviving if conditions change and suddenly become unfavorable.

Kara has a plant that produces either purple or white flowers. She crosses a plant that has two recessive alleles for white flowers with a plant that has two dominant alleles for purple flowers. Which result would be true of all of the offspring?

All of the offspring would have one recessive allele, one dominant allele, and purple flowers.

All of the offspring would have two recessive alleles and white flowers.

All of the offspring would have two dominant alleles and purple flowers.

All of the offspring would have one recessive allele, one dominant allele and flowers that were a mixture of purple and white.

Sandhill cranes hunt for insects and worms in the Florida marshes and lay eggs in the tall grasses. When the marshes flood with water, the grasses tend to die out. How does this impact the sandhill crane population?

It decreases their population by providing limited nesting sites.

It decreases their population by limiting food sources.

It increases their population by providing available water.

It increases their population by providing more open space to rest.

A science class was investigating how far a ball could be thrown. The table below shows their results. Based on the class’s data, how can they improve the accuracy of the investigation?

Average the data to account for the short distance in trial 4.

Scientists conduct many types of investigations. Their efforts often include fieldwork, surveys, models, and experiments. Which statement about scientific investigations is true?

They included multiple trials to increase the consistency of the data that are collected.

They rarely involve the collection of data under controlled conditions.

They follow exactly the same steps because there is only one scientific method.

Their primary focus seldom includes comparing or describing the unregulated world.

The picture shows a model of the solar system. Which is a limitation of the model?

It cannot show the relative sizes of each planet.

It cannot show how the planets orbit the sun.

It does not show the gravitational force exerted by each planet.

It does not show the order of the planets, from closest to the sun to farthest from the sun.

In 1897, Joseph Thomson discovered that atoms contain electrons. He proposed a change in the atomic theory of that time, and the theory was modified because of his discovery. Since Thomson’s discovery, atomic theory has been further modified. What is the best explanation for why scientific theories are modified?

New evidence that supports a revision prompts scientists to modify earlier theories.

Theories more than ten years old are usually out of date.

Scientists want to prove that the work of other scientists is wrong.

So much information is available today that it is harder to focus research and disprove theories.

While Melinda was at the beach, she decided to go swimming. While she was in the water, she saw a motorboat in the distance. When Melinda put her head under the water, she discovered that the sound of the motorboat was louder. The next day, she asked her science teacher why this happened. What explanation did Melinda’s science teacher provide?

Sounds travel faster through liquids than through gases.

The motorboat moved closer to Melinda.

Sounds travel fastest through the air.

Melinda’s sense of hearing is better under water than on land.

Which statement describes the energy changes that occur when water in a tea kettle is heated on a stove that uses natural gas?

Some of the chemical energy in the natural gas transforms into thermal energy, which heats the water. Then some of the thermal energy changes into sound energy when the water forms steam and the steam leaves the kettle.

Some of the thermal energy in the natural gas transforms into sound energy when the water becomes hot. Then some of the sound energy changes into light energy when the kettle becomes warm.

Some of the electrical energy in the natural gas transforms into thermal energy, which causes the water to form steam. Then some of the thermal energy changes into sound energy and light energy when the steam leaves the kettle.

Some of the light energy in the natural gas transforms into chemical energy in the water. Then some of the chemical energy changes into kinetic energy when steam leaves the kettle and into sound energy when the water boils.

Some ice cubes are added to a pot of boiling water. After a few moments, the water stops boiling. Which of the following explains why the water stopped boiling?

Heat energy from the water melted the ice.

Particles from the boiling water moved into the ice and melted the ice.

Cold energy from the ice transferred into the water, lowering the temperature of the water.

Cold energy leaving the ice caused it to melt.

A student learns that the sun is classified as a medium-size star and that many stars are much bigger and brighter. However, the student observes that other stars look very dim, even through a telescope. Why do other stars look much dimmer than the sun?

The sun is much closer to Earth than other stars are.

The sun appears yellow, which is more visible than other colors.

Other stars are made up of different gases than the sun is.

As light from other stars travels through space, it gets reflected.

The surface of Mercury has many more craters than the surface of Earth has. Which of the following statements best explains why Mercury has many more craters than Earth has?

Mercury has a thinner atmosphere than Earth does.

Mercury rotates faster than Earth does.

Mercury has a smaller mass than Earth does.

Mercury is much closer to the Sun than Earth is.

Evan is studying a diagram of the carbon cycle. Which of the following will he learn from the diagram?

Carbon is constantly being transferred among organisms and their environment.

Carbon is lost among organisms and their environment.

Carbon moves only among living organisms and their environment.

Carbon usually moves from animals to plants rather than plants to animals.

Energy pyramids show that less energy is available at each trophic level in an ecosystem. If energy is conserved—that is, it cannot be created or destroyed—how is it possible that less energy is available at each trophic level?

Some energy changes to thermal energy.

Living systems do not conserve energy.

Living systems do not create energy.

Some energy will return to the Sun.

The following bar graph shows the population of bacteria under different temperature ranges. What can be concluded about the bacteria from reading this graph?

They prefer temperatures between 20°C and 30°C.

They cannot tolerate temperatures above 50°C.

They prefer warmer temperatures to cooler temperatures.

The following bar graph shows the population of bacteria under different temperature ranges. What can be concluded about the bacteria from reading this graph?

They prefer temperatures between 20°C and 30°C.

They cannot tolerate temperatures above 50°C.

They prefer warmer temperatures to cooler temperatures.

SSA Science 2021 pt. 1

Authored by Jessica Westfall

Science

8th Grade

NGSS covered

Used 8+ times

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In August 1992, Hurricane Andrew, the second most costly natural disaster in United States history hit Southern Florida. As Hurricane Andrew approached Miami, cloudiness and precipitation increased dramatically. Which of the following best describes what happened as the hurricane approached the coastline?

The tidal surge in Miami decreased

The air temperature in Miami increased

The wind speed in Miami decreased

The air pressure in Miami decreased

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

At different places on Earth, depending on elevation, air pressure varies. Which of the following reflects the pressure at any point on Earth?

carbon dioxide levels in the air

moisture (water vapor) in the air

the weight of the atmosphere above that elevation

the strength of Earth’s magnetic field at that elevation

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Vivian placed an ice cube in a tray of warm water. The following picture shows her investigation.

Which statement describes the energy transfer that happens in Vivian’s investigation?

Energy in the form of heat is transferred from the ice cube to the water by radiation.

Energy in the form of heat is transferred from the water to the ice cube by radiation.

Energy in the form of heat is transferred from the ice cube to the water by conduction.

Energy in the form of heat is transferred from the water to the ice cube by conduction

Tags

NGSS.MS-PS1-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The following diagram shows energy transfer processes that happen above the ocean.

Which step of the diagram involves convection?

step 1

step 2

step 3

step 4

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The organization of the human body includes both nervous tissue and muscle tissue. What do both nervous tissue and muscle tissue have in common?

Each tissue is found in only one organ in an organism.

They are both found in the same organ inside an organism.

Each tissue is made of groups of similar cells that work together.

They are organized into organ systems that help an organism live.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The survival of a cell depends on the cell maintaining homeostasis. What is most likely to happen to a cell if homeostasis is not maintained?

The cell will immediately divide.

Cell processes will continue unchanged.

The cell will eliminate wastes more efficiently.

Many chemical reactions in the cell will slow down or even stop.

Tags

NGSS.HS-LS1-3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Cells can die or become damaged. Which part of cell theory is used to replace dead or damaged cells?

Cells divide to make new cells.

Cells multiply by cellular respiration.

Cells take in new cells through endocytosis.

Cells grow larger to make up for the lost cells.

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SSA Science 2021 pt. 1

At different places on Earth, depending on elevation, air pressure varies. Which of the following reflects the pressure at any point on Earth?

Vivian placed an ice cube in a tray of warm water. The following picture shows her investigation.

Which statement describes the energy transfer that happens in Vivian’s investigation?

The following diagram shows energy transfer processes that happen above the ocean.

Which step of the diagram involves convection?

The organization of the human body includes both nervous tissue and muscle tissue. What do both nervous tissue and muscle tissue have in common?

The survival of a cell depends on the cell maintaining homeostasis. What is most likely to happen to a cell if homeostasis is not maintained?

Cells can die or become damaged. Which part of cell theory is used to replace dead or damaged cells?

Pedro examines a tissue sample under a high-powered microscope. He makes a sketch in his lab notebook of one of the cells he observes. His sketch is shown below.

Which label should Pedro use for structure A?

What is the main function of the large central vacuole in a plant cell?

The following illustration shows four body systems. Siobhan’s science teacher asks her to identify the two organ systems that work together to provide cells with oxygen and to remove carbon dioxide.

Which two systems should Siobhan list?

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science

SSA Science 2021 pt. 1

At different places on Earth, depending on elevation, air pressure varies. Which of the following reflects the pressure at any point on Earth?

Vivian placed an ice cube in a tray of warm water. The following picture shows her investigation. Which statement describes the energy transfer that happens in Vivian’s investigation?

The following diagram shows energy transfer processes that happen above the ocean. Which step of the diagram involves convection?

The organization of the human body includes both nervous tissue and muscle tissue. What do both nervous tissue and muscle tissue have in common?

The survival of a cell depends on the cell maintaining homeostasis. What is most likely to happen to a cell if homeostasis is not maintained?

Cells can die or become damaged. Which part of cell theory is used to replace dead or damaged cells?

Pedro examines a tissue sample under a high-powered microscope. He makes a sketch in his lab notebook of one of the cells he observes. His sketch is shown below. Which label should Pedro use for structure A?

What is the main function of the large central vacuole in a plant cell?

The following illustration shows four body systems. Siobhan’s science teacher asks her to identify the two organ systems that work together to provide cells with oxygen and to remove carbon dioxide. Which two systems should Siobhan list?

Access all questions and much more by creating a free account

Similar Resources on Wayground

Popular Resources on Wayground

Discover more resources for Science

Vivian placed an ice cube in a tray of warm water. The following picture shows her investigation.

Which statement describes the energy transfer that happens in Vivian’s investigation?

The following diagram shows energy transfer processes that happen above the ocean.

Which step of the diagram involves convection?

Pedro examines a tissue sample under a high-powered microscope. He makes a sketch in his lab notebook of one of the cells he observes. His sketch is shown below.

Which label should Pedro use for structure A?

The following illustration shows four body systems. Siobhan’s science teacher asks her to identify the two organ systems that work together to provide cells with oxygen and to remove carbon dioxide.

Which two systems should Siobhan list?