Can You Pass This Eighth Grade Science Quiz?

How much do you remember from your eighth grade science class?

Introduction

We all know that the mitochondria is the powerhouse of the cell. Most of us probably remember being taught at some point that gravity is less on the moon than on Earth. But what else do you actually remember from your old science classes? Can you remember where Charles Darwin made his famous observation of finches? Do you know which of Sir Isaac Newton's laws claims equal actions necessitate an opposite equal reaction? Can you point to a map which region of the world experiences more tornados annually than anywhere else? If so (or if you just want to brush up on the basics), this quiz is for you.

Typically, middle school science classes in the United States consist of physical science (the study of basic physics and chemistry), life science (the study of living things), and earth science (the study of geology and astronomy) foci. In your eighth grade science class, you may have completed your first science fair project (hello, volcano made of baking soda and vinegar), used real chemicals in a physical science class, and perhaps you even dissected your first critter. These classes introduced us to the idea that life on Earth and in our universe is as complex as it is beautiful.

This quiz contains 35 multiple-choice questions, covering knowledge commonly taught in an American eighth grade science classroom. Pick the correct answer option, and you will be rewarded with further knowledge. This quiz is a great way to test your memory and maybe even learn something new. Find your old folder full of notes, click "Let's Play," and begin!

Description

We all know that the mitochondria is the powerhouse of the cell. Most of us probably remember being taught at some point that gravity is less on the moon than on Earth. But what else do you actually remember from your old science classes? Can you remember where Charles Darwin made his famous observation of finches? Do you know which of Sir Isaac Newton's laws claims equal actions necessitate an opposite equal reaction? Can you point to a map which region of the world experiences more tornados annually than anywhere else? If so (or if you just want to brush up on the basics), this quiz is for you.

Typically, middle school science classes in the United States consist of physical science (the study of basic physics and chemistry), life science (the study of living things), and earth science (the study of geology and astronomy) foci. In your eighth grade science class, you may have completed your first science fair project (hello, volcano made of baking soda and vinegar), used real chemicals in a physical science class, and perhaps you even dissected your first critter. These classes introduced us to the idea that life on Earth and in our universe is as complex as it is beautiful.

This quiz contains 35 multiple-choice questions, covering knowledge commonly taught in an American eighth grade science classroom. Pick the correct answer option, and you will be rewarded with further knowledge. This quiz is a great way to test your memory and maybe even learn something new. Find your old folder full of notes, click "Let's Play," and begin!

Short Description

How much do you remember from your eighth grade science class? Take this 35-question quiz to find out!


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Let's Play!

1. Cells use what type of molecule for energy?


1. Cells use what type of molecule for energy?

1. Carbohydrate

2. Lipid

3. Nucleic acid

4. Protein

The correct answer is carbohydrate. Carbohydrates are a group of compounds made up of sugars. Cells use carbohydrates as an energy source (by breaking them down) and for energy storage.



2. Which part of the cell produces energy?


2. Which part of the cell produces energy?

1. Nucleus

2. Chloroplast

3. Mitochondria

4. Ribosome

The correct answer is mitochondria. Mitochondria use the energy stored in food to make ATP (adenosine triphosphate). ATP is a special molecule that provides energy to the cell.



3. What is a key difference between a plant and animal cell?


3. What is a key difference between a plant and animal cell?

1. Plant cells are green

2. Animals cells move

3. Animal cells are larger

4. Plant cells have a cell wall

The correct answer is that plant cells have cell walls. Cell walls protect plant cells and provide structure for plants in the place of a skeleton.



4. Who is known as the father of genetics?


4. Who is known as the father of genetics?

1. Gregor Mendel

2. Francis Crick

3. James Watson

4. Maurice Wilkins

The correct answer is Gregor Mendel. Mendel was an Austrian monk who experimented by breeding pea plants in his monastery garden. His work formally established many rules of heredity.



5. Charles Darwin's observation of finches helped him develop his theory of natural selection. Where did he famously observe them?


5. Charles Darwin

1. Cayman Islands

2. Galapagos Islands

3. Kuril Islands

4. Ryukyu Islands

The correct answer is Galapagos Islands. Darwin theorized that all the finches on the Galapagos Islands descended from the South American mainland. Over time, the surviving finches may have adapted in various ways to life on the Galapagos Islands.



6. During which time period did dinosaurs emerge?


6. During which time period did dinosaurs emerge?

1. Pre-cambian time

2. Paleozoic Era

3. Mesozoic Era

4. Cenozoic Era

The correct answer is the Mesozoic Era, also known as the Age of Reptiles. It began 248 million years ago and lasted 183 million years.



7. "Viruses are living things." Is this statement true or false?


7. "Viruses are living things." Is this statement true or false?

1. True

2. False

This statement is false. Viruses cannot live on their own. They are not capable of eating, growing, breathing, or reproducing without the help of a living organism.



8. Red tides, common in the Gulf of Mexico, are caused by what?


8. Red tides, common in the Gulf of Mexico, are caused by what?

1. Pollution

2. Dinoflagellates

3. Slime mold

4. Small red fish

The correct answer is dinoflagellates. Dinoflagellates are single-celled algae that live in salt water. Some dinoflagellates are red and produce a strong poison. When they reproduce rapidly, the ocean water turns red.



9. What do scientists call the point at which an earthquake begins?


9. What do scientists call the point at which an earthquake begins?

1. Focus

2. Epicenter

3. Fault

4. Earthquake waves

The actual point at which the earthquake begins is the focus. The surface point directly above the focus is the epicenter, and it is at the epicenter where the effects of the earthquake are the most severe.



10. Where do more than half of the world's earthquakes occur?


10. Where do more than half of the world

1. Ring of Fire

2. Canadian Shield

3. Ring of Ash

4. Taupo Volcanic Zone

The Ring of Fire, also known as the Pacific Ring of Fire or Circum-Pacific Belt, is a horseshoe-shaped region of seismic activity. The world's strongest earthquakes and approximately 75% of the world's volcanoes occur within this region (thus the name).



11. Which type of rock is formed from lava?


11. Which type of rock is formed from lava?

1. Sedimentary

2. Metamorphic

3. Composite

4. Igneous

The correct answer is igneous rock. Molten rock that erupts on the surface of the earth is called lava. When lava cools, mineral crystals form, creating igneous rock.



12. What do geologists call a mound of sediment deposited by a glacier?


12. What do geologists call a mound of sediment deposited by a glacier?

1. Moraine

2. Outwash

3. Delta

4. Igneous rock

The correct answer is moraine. As glaciers move down from high altitudes or when the climate warms, glaciers slowly melt. This releases the sediment that was once frozen in the ice, and eventually the sediment is deposited as moraines.



13. 100 years ago, who proposed that all of the earth's continents were once part of a supercontinent they called Pangaea?


13. 100 years ago, who proposed that all of the earth

1. Nikola Tesla

2. Alfred Wegener

3. Niels Bohr

4. Michael Faraday

The correct answer is Alfred Wegener. He proposed that over time Pangaea started breaking apart, and continents started to slowly drift apart and move to their current conditions. This is known as continental drift theory.



14. Which of the following is not a basic type of mountain?


14. Which of the following is not a basic type of mountain?

1. Folded

2. Volcanic

3. Dome

4. Crease

The correct answer is crease. There are five basic mountain types: dome, folded, fault-block, plateau, and volcanic.



15. More tornadoes occur in which country than anywhere else in the world?


15. More tornadoes occur in which country than anywhere else in the world?

1. Argentina

2. United States of America

3. Bangladesh

4. Canada

Tornado Alley, an area of the central United States stretching from Nebraska to Texas, experiences more tornadoes than anywhere else on Earth. Cold air blowing from Canada collides with warm, moist air from the Gulf of Mexico, creating ideal conditions for these storms.



16. Which space mission sent people to the moon?


16. Which space mission sent people to the moon?

1. Pioneer

2. Galileo

3. Apollo

4. Explorer

The correct answer is Apollo. Neil Armstrong and Buzz Aldrin were the first people to walk on the moon in 1969 on the Apollo 11 spaceflight.



17. What do scientists call the large dark, flat areas on the surface of the moon?


17. What do scientists call the large dark, flat areas on the surface of the moon?

1. Craters

2. Highlands

3. Rays

4. Maria

The correct answer is maria. After most impacts on the Moon's surface stopped, more than 3.5 billion years ago, maria formed when lava flowed up through the Moon's crust and solidified.



18. If a coastal area has a high tide at 6:00 AM, at about what time will the next low tide occur?


18. If a coastal area has a high tide at 6:00 AM, at about what time will the next low tide occur?

1. 12:00 PM

2. 10:00 AM

3. 6:00 PM

4. 2:00 PM

The correct answer is 12 PM. Coastal areas of high tide occur about once every 12 hours. Low tides occur about 6 hours after high tide.



19. Which of Sir Isaac Newton's laws states that for every action there is an equal and opposite reaction?


19. Which of Sir Isaac Newton

1. Law of inertia

2. Newton's first law of motion

3. Newton's second law of motion

4. Newton's third law of motion

The correct answer is Newton's third law of motion, which states that when one object applies a force on another object, the second object applies an equal force in the opposite direction to the first object.



20. Which of the following is an example of a second-class lever?


20. Which of the following is an example of a second-class lever?

1. Tweezers

2. Wheel barrow

3. Crow bar

4. Teeter-totter

The correct answer is wheel barrow. In a second-class lever, the output force (bucket of the wheel barrow) is between the input force (handles of the wheel barrow) and the fulcrum (wheel).



21. What type of energy is produced in the Sun?


21. What type of energy is produced in the Sun?

1. Thermal

2. Light

3. Radiant

4. Nuclear

The correct answer is nuclear energy, energy that is stored in the nucleus of an atom. In the Sun, nuclear energy is released through nuclear fusion, when nuclei join together.



22. Which of the following is not considered a noble gas?


22. Which of the following is not considered a noble gas?

1. Radon

2. Argon

3. Neon

4. Oxygen

The correct answer is oxygen. Noble gases are usually odorless, tasteless, and colorless and react only under extreme conditions.



23. "Fish contains saturated fats." Is this statement true or false?


23. "Fish contains saturated fats." Is this statement true or false?

1. True

2. False

This statement is false. Fish and plant fats are unsaturated fats, making them a much healthier food choice than animal fats. Unsaturated fats are liquid at room temperature due to their molecular structure.



24. Which type of electromagnetic rays are used in cancer treatment?


24. Which type of electromagnetic rays are used in cancer treatment?

1. Gamma rays

2. Microwaves

3. Infrared waves

4. Radio waves

The correct answer is gamma rays. Gamma rays are high-energy electromagnetic waves produced when the nucleus of an atom breaks apart or changes. Gamma rays form in space when stars explode.



25. "The color of an object is the color of light that reflects off the object." Is this statement true or false?


25. "The color of an object is the color of light that reflects off the object." Is this statement true or false?

1. True

2. False

This statement is true. When white light strikes an object, the object absorbs all the wavelengths of light except its color. The color of the object is the color of the light it reflects.



26. Which planets have liquid water on their surface?


26. Which planets have liquid water on their surface?

1. Earth and Pluto

2. Earth, Pluto, Mars

3. Earth and Mars

4. Earth only

Earth is the only planet in our solar system with liquid water on its surface. The presence of liquid water, the Earth's protective atmosphere, and its moderate temperature allow life to exist.



27. What is the Great Red Spot on Jupiter?


27. What is the Great Red Spot on Jupiter?

1. Confetti

2. Nuclear fission

3. Giant storm

4. Blazing fire

The Great Red Spot is actually a giant storm that is twice as wide as Earth. (Image: NASA/JPL)



28. Which of the following is Neptune's largest moon?


28. Which of the following is Neptune

1. Charon

2. Triton

3. Phobos

4. Europa

Triton is Neptune's largest moon. It is 80% as large as the earth's moon. (Image: NASA/JPL/USGS)



29. What is an object whose gravity is so great that no light can escape?


29. What is an object whose gravity is so great that no light can escape?

1. White dwarf

2. Neutron star

3. Black hole

4. Void

The correct answer is black hole. Astronomers cannot actually see a black hole, but if they notice a star circling around something and they do not know what it is, they infer it is a black hole. (Image: NASA/JPL-Caltech)



30. "The universe is expanding." Is this statement true or false.


30. "The universe is expanding." Is this statement true or false.

1. True

2. False

As the universe expands, galaxies move away from each other. As they move away, their wavelengths lengthen and stretch out also.



31. What type of organism is algae?


31. What type of organism is algae?

1. Plant

2. Animal

3. Bacteria

4. Protist

The correct answer is protist. Even though algae have chlorophyll and make their own food through photosynthesis, they are grouped in kingdom Protista because of their cellular structure.



32. What type of bones do birds have?


32. What type of bones do birds have?

1. Hollow

2. Solid

3. Cartilaginous

4. Semi-regular

Birds have hollow bones to make their bodies lighter and more efficient in flight.



33. What type of organism is a sponge?


33. What type of organism is a sponge?

1. Animal

2. Plant

3. Bacteria

4. Fungus

The correct answer is animal. Even though sponges lack organs, they meet all the qualifications of an animal.



34. What group of animals do ticks belong to?


34. What group of animals do ticks belong to?

1. Arachnids

2. Insects

3. Crustaceans

4. Mollusks

The correct answer is arachnids. Ticks have four pairs of jointed legs, two body segments, no antennae or wings. Spiders and scorpions are also arachnids.



35. Which body system controls the hormones released into the bloodstream?


35. Which body system controls the hormones released into the bloodstream?

1. Circulatory system

2. Endocrine system

3. Nervous system

4. Immune system

The correct answer is endocrine system, which consists of organs and tissues that release chemical messages (hormones) into the bloodstream. Messages transmitted by the endocrine system are slower than those transported by the nervous system, but they last longer and influence more cells.




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