How do the carbon cycle, the oxygen cycle, and the water cycle demonstrate the law of conservation of matter?

C. They all show matter changing form but the total amount of matter does not change.

A. They do not demonstrate the law of conservation of matter.

B. They all show different amounts of matter as it is used up in the system.

D. They all show that animals are using the matter so it always becomes new energy.

Use the information in the table below and the equation for density (d = m/v) to determine which object listed in the table is the most dense?

All three balls have the same density

Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs), and Francium (Fr) are all in group 1 of the periodic table. Why are these elements in the same column on the periodic table?

They all have similar properties.

They have the same number of protons.

Brian is performing a chemical reaction by dissolving antacid tablets in water. If he wants the reaction to speed up, he should…

increase the temperature of the water.

allow the tablets to dissolve one at a time.

Fresh eggs will sink in fresh water. However, if you add enough salt to the water, the eggs will float. Which statement BEST explains this phenomenon?

Adding salt to the water makes the water more dense than the eggs.

Adding salt to the water makes the water less dense than the eggs.

Adding salt to the water makes the water heavier than the eggs.

Adding salt to the water makes the eggs lighter than the water.

Metal electrical wires are often made with a rubber coating, so the wires are safer to use. Which statement below best explains why rubber is a useful material to make electrical wires safer?

Rubber is a good thermal and electrical insulator.

Rubber has a lower melting point than metal.

Rubber makes the wire less dense.

Mark is making a model of an atom. How should he arrange the sub-atomic particles in his model (including the protons, neutrons, and electrons)?

Mark should arrange the protons and neutrons inside the nucleus and the electrons outside the nucleus.

Mark should arrange the protons and electrons inside the nucleus and the neutrons outside the nucleus.

Mark should arrange the electrons inside the nucleus and the protons and neutrons outside the nucleus.

Mark should arrange the neutrons inside the nucleus and the protons and electrons outside the nucleus.

The weight of an object will be slightly less at higher elevations, such as on the top of a mountain, than it is at sea-level. What explains this phenomenon?

The Earth's gravitational pull on the object is weaker when the object is farther from the center of the Earth.

The colder temperatures at higher elevations cause the object to become more dense and take up less space.

The Earth’s atmospheric pressure has less effect on the object when it is farther from Earth’s center.

The Earth’s magnetic field is stronger at higher elevations.

When a candle is lit, the wick burns, the wax melts, the candle changes shape, and the air around the candle heats up. Which of these is an example of a chemical change?

The air around the candle heating up

How is a compound different from an element?

An element can contain only one type of atom, while compounds will contain more than one type of atom.

Compounds can make up mixtures, while elements cannot.

A compound will occur in nature, while an element will not.

A compound will always have the same composition, while an element may have different compositions.

In the chemical reaction shown below, sodium atoms (Na) and bromine atoms (Br) combine to form sodium bromide (NaBr). Which of the statements below is true of this chemical reaction? 2Na + Br₂ → 2NaBr

The number of atoms remains constant throughout the reaction.

Atoms are created in the formation of the compound.

Atoms are lost in the formation of the compound.

Atoms are mixed together but not bonded.

Jason wants to explain the effect of the Sun’s gravity on an orbiting planet to his younger sister. Which of the following would be the best model for him to use?

Twirling a ball on a string: the ball represents the planet; the hand represents the sun and the string represents gravity.

A drawing with a large circle representing the Sun in the center and smaller circle for the planet with an arrow showing the force of gravity

A clay model with a large ball for the Sun, a smaller ball for the planet and a stick to connect them.

A picture of the Sun and a planet that orbits the Sun. He can tell her about gravity.

When describing distances between planets and stars, why do astronomers use light-years and astronomical units instead of meters or kilometers?

The distances in space are too large to use kilometers as a unit of measure.

Kilometers are often used to describe distances in space.

Scientists who study space wanted their own measurements.

We cannot travel those distances so we have to use calculations to determine them.

As the moon revolves around Earth, it is between the Earth and the Sun every 29.5 days. Why don’t we see a solar eclipse every month?

The Earth, Sun and moon have to be lined up at the correct angle for the moon's shadow to fall on Earth.

The moon only casts a shadow every 3 years so there is no eclipse.

There is always an eclipse we just don’t see it because it lands on the Ocean.

The moon is only between the Earth and the Sun at night so we do not see the shadow.

What has a greater effect on the tides, the Sun or the Moon? Why?

The moon because it is much closer to the Earth.

The Sun because it is so much larger than the moon.

The Sun because it heats up the water during the day.

The moon because you can see it day and night.

Proxima Centauri is the closest star to Earth other than our Sun. It is 4.22 light years away. What does this mean?

The light from that star takes 4.22 years to travel to Earth.

It will take 4.22 years for a spacecraft to travel that far.

It is 4.22 times farther away than the length of our galaxy.

It is 4.22 times farther away than the furthest planet in our solar system.

The atomic theory has been modified many times over the centuries. What is the best reason for these modifications?

New technology led to the discovery of new evidence.

The original theories were based on myths.

Other scientists could not duplicate the original experiment.

The original theory was incorrect and needed to be discarded.

How has space exploration benefitted world-wide communication?

Satellites allow signals to be transmitted to locations where wires cannot reach.

Rocket technology allows us to send and receive messages at a faster rate.

Space exploration gives people a common goal to discuss and research.

Telescopes allow communications to travel further and faster.

Scientific theories are based on a large body of evidence collected from many sources over a long time. Sometimes new evidence is discovered that contradicts a theory. If this contradictory evidence is accepted by the scientific community, what will happen to the original theory?

The old theory will be modified to include the new evidence.

The old theory will be discarded because it does not fit with the new evidence.

The old theory will stay the same because the evidence is new.

A new theory will be written using the new evidence.

Which of these best describes a galaxy?

billions of stars that revolve around a central location.

5 to 10 stars that make a picture in the night sky.

hundreds of stars that travel through space together.

thousands of stars that travel randomly through space.

Scientists use a variety of telescopes when studying objects in space. There are radio telescopes, infrared telescopes, gamma ray telescopes and x-ray telescopes as well as telescopes that receive visible light. What is the best explanation for why we use so many different types?

Visible light is only a small part of the electromagnetic spectrum given off by objects in space.

Scientists only use light telescopes to view objects in space.

Some stars only give off x-rays or gamma rays.

As we get new technology we keep replacing the telescopes.

The Sun is an average sized star, yet it appears much brighter than other stars to us. What is the best reason for this?

The Sun is much closer to Earth than any other star.

The Sun burns much hotter than the other stars.

The Sun has an increase of energy during solar flares.

The sun is a yellow star and yellow stars appear brighter than other stars.

Astronomers often compare the colors of stars. Knowing the color of a star is most useful in determining

the distance of the star to Earth.

the number of planets orbiting the star.

Which of these phrases best describes a heliocentric solar system model?

The Sun is at the center of the solar system and the planets and other objects orbit the Sun in elliptical paths.

The Earth is at the center of the solar system and the Sun and other objects orbit the Earth in elliptical orbits.

The Sun is at the center of the solar system and the planets and other objects are stationary surrounding the Sun.

The Sun, planets and other objects are in a straight line.

If an object is cut into several pieces, the total mass of all the pieces together will be...

equal to the original mass of the object.

more than the original mass of the object.

less than the original mass of the object.

Which of the following would be considered a pseudoscience?

Cryptozoology (The search for Bigfoot (Yeti), the Loch Ness monster, and other creatures that biologists believe do not exist).

Astronomy (the study of the universe, stars, and planets).

Heredity (the study of how physical traits are passed on from one generation to the next)

Chemistry (the study of matter and the interactions between elements)

Scientists use different types of investigations to develop scientific explanations. In which scenario did a scientist conduct an experiment with a control?

A scientist concluded that a new fertilizer doubled the growth of corn plants in a study.

A scientist determined the relative age of a fossil based on its position in a rock layer.

A scientist identified and classified a new species of fish in the Amazon River in South America.

A scientist discovered a new galaxy in space after analyzing images from the Hubble Space telescope.

A biology class is studying the effects of a new highway across the Everglades on populations of birds that live there. When should the class observe bird population?

Before and after the highway is constructed

One year before the construction begins.

Immediately after construction is finished.

During the time the highway is constructed.

An astronaut takes a 20 pound dumbbell with him to the Moon for exercise. On Earth, the dumbbell has a mass of 9.1 kilograms and a weight of 89 Newtons. Which statement BEST describes how a lower gravitational force on the Moon will affect the astronaut’s dumbbell?

The dumbbell will have the same mass but less weight on the Moon.

The dumbbell will have the same mass and the same weight on the Moon.

The dumbbell will have the same mass and more weight on the Moon.

The dumbbell will have less mass and less weight on the Moon.

Aniya conducted research to find out the rate at which seeds grow. She published the results of her research in a paper. William read the paper and decided to see if Aniya’s results were correct. What is the BEST way for William to check the credibility of her experiment?

By repeating the experiment using exactly the same method.

By analyzing the results in detail to see if they are correct.

By improving the method and then repeating the experiment.

By asking Aniya to repeat the experiment and observing her procedure.

Which statement best describes the change in the motion of the particles as a solid melts into a liquid?

The molecules will speed up and collide more frequently.

The molecules will slow down and collide less frequently.

The molecules will slow down and collide more frequently.

The molecules will speed up and collide less frequently.

Susan is making a model to represent a star, a universe and a galaxy. She places a bowl inside a shoe box. She places a ball inside the bowl. What do the shoe box, bowl and ball represent?

The shoe box represents a universe, the bowl represents a galaxy and the ball represents a star.

The shoe box represents a universe, the bowl represents a star and the ball represents a galaxy.

The shoe box represents a galaxy, the bowl represents a universe and the ball represents a star.

The shoe box represents a star, the bowl represents a galaxy and the ball represents a universe.

Some of the physical characteristics of the planets in the Solar System are shown below. The distance of each planet from the Sun is given in astronomical units (AU).

C. Planets located closer to the Sun have higher mean orbital speeds than those that are farther away.

A. Planets located closer to the Sun have higher masses than those that are farther away.

B. Planets higher in mass have higher mean orbital speeds than those that are lower in mass.

D. Planets higher in mass have higher mean orbital speeds and are closer to the Sun than those with lower mass.

Science Quiz

Authored by Chekeria Williams

Science

8th Grade

NGSS covered

Used 23+ times

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51 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of these statements best describes the Law of Conservation of Energy?

Animals create new energy by changing matter into energy.

Organisms cannot create or destroy energy but can change its form.

Organisms save the energy that they create when they eat.

Plants turn energy into matter so they can save energy.

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A scientist working in a lab has tested his hypothesis and determined that it cannot be supported by the data obtained. Which of these BEST describes what he should do next in his scientific process?

He should test the hypothesis again using the precise same experimental design conditions.

He should revise the hypothesis to match his results and report that his hypothesis was supported.

He should completely disregard the hypothesis and start over from scratch because his research and data is useless.

He should look at the data and research, modify his hypothesis, and test the modified hypothesis using a new experimental design.

Tags

NGSS.MS-LS1-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

All of the following are useful in scientific investigations EXCEPT:

Collection of evidence

Assumptions and bias

Creativity and imagination

Logical reasoning

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is needed for the process of photosynthesis to begin?

carbon dioxide, oxygen and light energy

carbon dioxide, light energy and water

light energy, water and oxygen

sugar, oxygen and light energy

Tags

NGSS.MS-LS1-6

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which organisms use cellular respiration for growth and repair?

Plants and animals.

Only plants.

Only animals.

All living organisms.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS1-7

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following statements BEST represents a scientific idea?

Splitting a pole while walking with someone will cause bad luck.

The universe was formed due to a mass explosion called the Big Bang Theory.

The great pyramids in Egypt were built by aliens.

The Bermuda Triangle has a high incidence of abnormal behavior.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A diagram of the carbon cycle is shown below. Each arrow represents a process in the cycle. Which of the following best describes the process that occurs at arrow 5?

A. Bacteria break down molecules from animals into carbon-based soil nutrients.

B. Plants release oxygen that is converted by animals into carbon dioxide.

C. Animals release oxygen used by plants to produce carbon dioxide.

D. Plants release carbon dioxide used by animals in cellular respiration.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

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