8 th grade science bowl eog competition

8th Grade Science Bowl EOG

Competition

DON’T FORGET

When you get your EOG booklet – label your periodic table first thing!

Face Off – CALL MY BLUFF!• Team 1 question : all stand if know the

answer (5 seconds) • Team 2 : pick person standing to answer• Team 1 : if correct win as many as standing • If lose: if wrong lose as many as standing • Cant pick the same person in a row • Only the students who are up can speak…

you CAN NOT give your teammates help. If you call out a point goes to the other team.

HOLD UP!• There’s a CATCH…• You must also ONLY demonstrate POSITIVE actions – any put downs

or negative statements towards other team/teammates results in

immediate independent loss of points.

Everyone makes mistakes, let’s focus on being EXTRAORDINARY!!!

Rules and Regulations

This is a team exercise. No put downs or makingfun of anyone.

Keep in mind…

The ultimate goal is for EVERY 8th grader to score a 3 or 4. So help each other

out!

Let's Begin…You

EOG

Which of the following is an example of a mixture?

a. Melting iceb. Sand waterc. Boiling waterd. Alcohol in water

Answer

B) Sand in water

The reactants involved in a chemical reaction are shown:

Na 2 O + H 2 O -- ?

How many O atoms must be present in the product that forms from this reaction?

a. 1b. 2c. 3d. 4

Answer

B) 2

Which of the following may happen during a physical change?

a. New substances are formedb. Reactants form productsc. A precipitate is formedd. The temperature may increase

Answer

D) The temperature may increase

Which of the following compounds contains the greatest number of atoms?

a. CO 2 b. C22H46

c. C6H12O6

d. CH4

Answer

B) C22H46

Which of the following is an example of a chemical change?

a. Water evaporatingb. Wood burningc. Ice cream meltingd. Face blushing

Answer

B) Wood Burning

Carlos has two unidentified liquids labeled A and B. The liquids look similar, but they are different colors. Carlos needs to determine if the two liquids have the same density. To do this, Carlos decides to combine the liquids. Will combining the liquids help Carlos determine if the densities are the same?

a. No, it will not be possible to tell them apart once they are mixed.

b. Yes, the liquids will form separate layers if their densities are different.

c. Yes, a reaction will occur if the densities are not the same.

d. No, density has nothing to do with how the liquids mix.

Answer

B) Yes, the liquids will form separate layers if their densities are different.

You test the local stream water with a pH indicator strip. It turns a light orange for a pH of 4. What does this indicate about the water in the stream?

a. The water is a strong acid.b. The water is a strong basic.c. The water is a weak acid.d. The water is a strong base.

Answer

C) The water is a weak acid.

Amber plans to build an electric motor for her science fair project. She decides to test how well different materials conduct electricity from the batteries to the motor. Which of the following materials will be the best conductor for Amber’s motor?

a. A copper wireb. A rubber bandc. A glass rodd. A neon bulb

Answer

A) A copper wire

A scientist wants to study the effects of acid rain on the water quality in a lake. Which of the following pieces of equipment would be most useful to the scientist?

a. pH meterb. barometerc. GPSd. Dissolved oxygen meter

Answer

A) pH meter

Where is the majority of Earth’s freshwater located?

a. Riversb. Lakesc. Groundwaterd. Glaciers

Answer

D) Glaciers

Approximately 70% of Earth’s surface is covered with water. What percentage of this water is salt water?

a. 67%b. 77%c. 87%d. 97%

Answer

D) 97%

Which of the following structures is responsible for breaking down water and worn-out cell parts?

a. Ribosomeb. Vacuolec. Lysosomed. Mitochondrion

Answer

C) Lysosome

Which of the following statements is not a characteristic of a living thing?

a. Must be able to breatheb. Must be made of cellsc. Must be able to grow and reproduced. Must be able to respond to its environment

Answer

A) Must be able to breathe

Mitochondria bread down food and release energy for the cell. In which type of cell would you expect to find the most mitochondria?

a. Skin cellsb. Muscle cellsc. Nerve cellsd. Fat cells

Answer

B) Muscle Cells

Which of the following is a poor conductor of heat?

a. Metalsb. Metalloidsc. Nonmetalsd. Electrons

Answer

C) Nonmetals

Why is drinking water treated before it is pumped to homes?

a. To kill microscopic organisms that could make people sick

b. To make sure that it tastes goodc. To make sure that the water is cleard. To add microscopic organisms that will make

the water safe to drink.

Answer

A) To kill microscopic organisms that could make people sick

What is the smallest unit of life?

a. Matterb. Massc. Ciliad. Cells

Answer

D) Cells

Which of the following statements is accurate about the fossils found in layer C?

a. Fossils found in layer C are older than fossils found in layer D.b. Fossils found in layer C are younger than fossils found in layer

G.c. Fossils found in layer C are older than fossils found in layer A.d. Fossils found in layer C are younger than fossils found in layer

A.

Answer

C) Fossils found in layer C are older than fossils found in layer A.

What is the youngest layer of earth shown in this diagram?

a. A b. Ec. Gd. F

Answer

C) G

What percentage of the Earth’s water is contained in oceans?

a. About 3%b. About 29%c. About 71%d. About 97%

Answer

D) 97%

What two quantities must be known to calculate the density of a sample of matter?

a. Color and massb. Mass and volumec. Length and massd. Solubility and mass

Extra points: What is the formula for Density?

Answer

B) Mass and Volume

Density= Mass/ volume

What mass (in grams) of oxygen (02) is required for this reaction to occur?

CH4 + 02 --- 2CO2 + H20

16 g ? 44g 36g

a. 16b. 36c. 44d. 64

Answer

D) 64

How do ice layers show the history of Earth’s climate?

a. The thickness of each ice layer can show temperature changes on Earth.

b. Concentrations of gases and elements in the ice can show temperature changes on Earth.

c. The presence of certain gases in the ice can show that climate changed at certain times on Earth.

d. The presence of soot and other particles in the ice can show that climate changed at certain times on Earth.

Answer

C) The presence of certain gases in the ice can show that climate changed at certain times on Earth.

What is a disease that can spread from one person to another called?

a. Carrierb. Vectorc. Contagiond. Noninfectious disease

Answer

C) Contagion

What is most likely occurring in the diagram above?

a. Plates are converging to form a mountain.b. Plates are transforming to form a earthquakec. Plates are diverging and causing seafloor

spreading d. Plates are subducting and causing a volcano.

Answer

D) Plates are subducting and causing a volcano.

If you pour water onto a sheet of wax paper, the water forms drops that are flat on the bottom and round on the top. Why does the water arrange itself in this shape?

a. Cohesion causes the water molecules to be attracted to the wax paper.

b. Cohesion causes the water molecule to be attracted to one another.

c. Adhesion causes the water molecules to be attracted to one another.

d. Adhesion causes the water molecules to be attracted to the wax paper.

Answer

B) Cohesion causes the water molecule to be attracted to one another.

A student wants to do a research project about estuaries. Which of the following bodies of water would she most likely study?

a. Lake Erieb. Mississippi Riverc. Gulf of Mexicod. Chesapeake Bay

Answer

D) Chesapeake Bay

What are the structures that surround the cell of the paramecium (shown above) and move it through water called?

a. Flagellab. Pseudopodsc. False feetd. Cilia

Answer

D) cilia

Index fossils are fossils of species that lived for only a short period of time and lived on many parts of the planet. How are index fossils useful to scientists?

a. They are used for naming new fossils.b. They are used to determine where an unknown

fossil is from.c. They are used to determine the age of an

unknown fossil or rock layer.d. They are used to develop a list of all species that

ever lived in a certain area.

Answer

C) They are used to determine the age of an unknown fossil or rock layer.

Which statement about fossils is true?

a. It is impossible to determine the age of a fossil based on its depth.

b. Newer fossils are found deeper in the ground.c. The larger the fossil, the deeper it will sink into

the ground.d. In undisturbed areas, older fossils are found

deeper in the ground.

Answer

D) In undisturbed areas, older fossils are found deeper in the ground.

Which of the following will float on top of water?

a. A piece of wood weighing 0.69 g/mLb. A piece of wood weighing 1.57 g/mLc. A ball weighing 5.9 g/mLd. A ball weighing 10.6 g/mL

Answer

A) A piece of wood weighing 0.69 g/mL

Scientists must monitor the effects of non-point source pollution on the Neuse River in North Carolina. Which of the following things should the scientists NOT monitor?

a. Agricultural run-off from local farmsb. Sewage leaking into the river c. Water from roadside ditchesd. Low pH level of precipitation

Answer

B) Sewage leaking into the river

A tree was struck by lightening and burned to the ground. Before burning, the tree weighed 80,000 pounds. After

burning, the ashes of the tree weighed in at 50,000 pounds. Explain what happened to the 30,000 pounds not

present after burning. Was it destroyed?

a) No this is not possible the reactant must always weigh the same as the productb) Yes, that is why 30,000 pounds are missingc) No, the missing pounds are now gas d) No, the missing pounds are now a liquid

Answer

c) No, the missing pounds are now gas

Which of the following statements about chemicals is true?

a. All chemicals are synthetic.b. Chemicals can either be synthetic or naturally

occurring.c. Chemicals can be solids, liquids, but not gases.d. All chemicals are harmful to humans.

Answer

B) Chemicals can either be synthetic or naturally occurring.

What is most likely the reason for scientists misunderstanding in the

fossil record?

A) Changes in climateB) Erosion and unconformity C) Species extinction D) Tectonic plates

Answer

B) Erosion and unconformity

Which of the following statements is NOT part of cell theory?

a. All organisms are made of one or more cells.b. Cells are the basic units of structure and

function for all life.c. All cells come from cells that already exist.d. All new cells are identical to their parents.

Answer

D) All new cells are identical to their parents

What do scientists mean when they say water is a polar molecule?

a. Water molecules are rod shaped.b. Water molecules have a positive charge on one

end and a negative charge on the other.c. The water molecule has a negative charge at

cold temperatures.d. The water molecule never develops a charge

and is always neutral.

Answer

B) Water molecules have a positive charge on one end and a negative charge on the other.

Which statement is true about elements and compounds?

A) Both can form new compounds and new elements through different combinationsB) Both can be combined in different ways to produce different atomsC) Both can produce the same chemical with different combinationsD) Both can be combined differently to produce different substances

Answer

D) Both can be combined differently to produce different substances

Why is water considered a universal solvent?

a. Water can be dissolved in almost anything.b. Water can dissolve almost anything.c. Water can be found across the universe.d. Water can make up almost any solution.

Answer

B) Water can dissolve almost anything.

What property of water allows it to be a solvent?

A) densityB) polarityC) CohesionD) specific heat

Answer

B) Polarity

What property of water enables an insect to walk on top of the water?

a. Adhesion and Density b. Buoyancy and Cohesion c. Cohesion and Surface tensiond. Polarity and Adhesion

Answer

C) Cohesion and Surface tension

What does it mean when a scientist says a lake has a high turbidity?

a. The water has a lot of particles in it.b. The water is very clear.c. The water is very basic.d. The water can support many organisms.

Answer

A) The water has a lot of particles in it.

The picture represents and atom of which element?

+ ++ +

+

Answer

BORON (B) Atomic Number 5 = 5 protons

Which of the following is a clear example of point-source pollution?

a. Trash floating in ocean waterb. Feedlot wastes in a riverc. Oil spill from a supertankerd. Salts from irrigation

Answer

C) Oil spill from a supertanker

Scientists on a ship are using sonar to map the ocean floow. They send out a sound pulse at Point A that takes 8 seconds to return to the ship. At Point B, the sound pulse takes 4 seconds to return. What conclusion can be drawn about the depth of the water at Points A and B?

a. They are the same depth.b. Water at Point A is twice as deep as that at Point B.c. Water at Point B is twice as deep as that at Point A.d. Water at Point B is half as deep as water at Point A.

Answer

B) Water at Point A is twice as deep as that at Point B.

A computer engineer is trying to design a new memory chip for a laptop. He wants to use a material for part of the chip that will not allow electricity to past through it. Which of the following materials should he use in his design?

a. Plasticb. Aluminumc. Tind. Lead

Answer

A) Plastic

Which project is most likely to interest a scientists working at a biotechnology company?

a. Study and reconstruction of fossilized bonesb. Conservation of key species within ecosystemsc. Development of genetically modified corn

plantsd. Prevention of sewage leaking into water

supplies

Answer

C) Development of genetically modified corn plants

Which factor refers to the “strength” that a chemical substance has on an organism?

a. Doseb. Susceptibilityc. Toxicityd. Potency

Answer

D) Potency

Which of the following describes the tendency of a water molecule to stick to other water molecules?

a. Cohesionb. Densityc. Adhesiond. Buoyancy

Answer

A) Cohesion

A farm is located directly beside a river that the city uses for their water supply.

What can be some possible negative effects?

A) There will be an increase in water temperature causing high ph levelsB) There will be an increase in nitrogen causing low dissolved oxygen C) There will be a decrease in turbidity causing clearer waterD) There will be an increase in bioindicators

Answer

B) There will be an increase in nitrogen causing low dissolved oxygen

Which of the following represents a mixture?

a. A piece of copper wireb. The oxygen gas in a pressurized tankc. A slice of mushroom pizzad. A lead fishing weight

Answer

C) A slice of mushroom pizza

Which form of water has the highest density?

a. Iceb. Warm waterc. Cold waterd. Water vapor

Answer

C) Cold water

What does the law of conservation of matter state?

a. The total mass of the reactants is greater than the total mass of the products.

b. The total mass of the reactants is less than the total mass of the products.

c. The totally mass of the reactants equals the total mass of the products.

d. Mass can be created or destroyed.

Answer

C) The totally mass of the reactants equals the total mass of the products.

How are parasites and viruses similar?

a. Both are contagious diseases.b. Both infect host organisms.c. Both reproduce using host cells.d. Both break down food using oxygen.

Answer

B) Both infect host organisms.

How is the cell membrane important to the process of osmosis?

a. It allows water to move into the cell.b. It allows all materials from the outside environment to

move into the cell.c. It traps water and nutrients that would otherwise be

unable to move into the cell.d. It collects nutrients from water to the outside

environment and moves them into the cell.

Answer

A) It allows water to move into the cell.

Which of the following is an example of a solution?

a. Melting iceb. Sand waterc. Boiling waterd. Alcohol in water

Answer

D) Alcohol in water

A pseudopod is a structure of a protist called an amoeba. Which statements best describes a pseudopod?

a. It is an extension of cytoplasm used to move and capture food.

b. It is a small capsule used to store food.c. It is a whiplike tail used to capture prey.d. It is a circular structure that captures sunlight to

make energy.

Answer

a. It is an extension of cytoplasm used to move and capture food.

How are plant and animal cells similar?a. They both have cilia.b. They both have a nucleus.c. They both have an vacuoles.d. They both have chloroplasts.

Answer

B.) They both have a nucleus.

Which of the following refers to how an organism responds to a particular chemical substance?

a. Individual susceptibilityb. Deathc. Exposure timed. Low dosage

Answer

A.) Individual Susceptibility

Why is water often used as a coolant in factories and reactors?

a. It absorbs a lot of heat before increasing in temperature.

b. It cools off very quickly after the heat source has been removed.

c. It increases and decreases in temperature very quickly.

d. It increases temperature quickly when a heat source is applied.

Answer

a. It absorbs a lot of heat before increasing in temperature.

What is the name of a chemical that can cause cancer?

a. Nutrientb. Carcinogenc. Constrictord. Synthetic chemicals

Answer

B) Carcinogen

Finding a fossil 300 feet underground means that the fossil is older than a fossil found at 150 feet underground. This statement supports what scientific law?

a. The law of conservation of matterb. The law of superpositionc. The law of uniformitarianismd. The law of partial pressures

Answer

B) The Law of Superposition

Charles Darwin proposed the idea that organisms that are best suited to their environments will survive and reproduce. What is this theory known as?

a. Adaptationb. Variationc. Inherited characteristicsd. Natural selection

Answer

D) Natural Selection

Which of the following is an example of a mixture?

a. Melting iceb. Sand waterc. Boiling waterd. Alcohol in water

Answer

B) Sand in water

The reactants involved in a chemical reaction are shown:

Na 2 O + H 2 O -- ?

How many O atoms must be present in the product that forms from this reaction?

a. 1b. 2c. 3d. 4

Answer

B) 2

Which of the following may happen during a physical change?

a. New substances are formedb. Reactants form productsc. A precipitate is formedd. The temperature may increase

Answer

D) The temperature may increase

Which of the following compounds contains the greatest number of atoms?

a. CO 2 b. C22H46

c. C6H12O6

d. CH4

Answer

B) C22H46

Which of the following is an example of a chemical change?

a. Water evaporatingb. Wood burningc. Ice cream meltingd. Face blushing

Answer

B) Wood Burning

Carlos has two unidentified liquids labeled A and B. The liquids look similar, but they are different colors. Carlos needs to determine if the two liquids have the same density. To do this, Carlos decides to combine the liquids. Will combining the liquids help Carlos determine if the densities are the same?

a. No, it will not be possible to tell them apart once they are mixed.

b. Yes, the liquids will form separate layers if their densities are different.

c. Yes, a reaction will occur if the densities are not the same.

d. No, density has nothing to do with how the liquids mix.

Answer

B) Yes, the liquids will form separate layers if their densities are different.

You test the local stream water with a pH indicator strip. It turns a light orange for a pH of 4. What does this indicate about the water in the stream?

a. The water is a strong acid.b. The water is a strong basic.c. The water is a weak acid.d. The water is a strong base.

Answer

C) The water is a weak acid.

Amber plans to build an electric motor for her science fair project. She decides to test how well different materials conduct electricity from the batteries to the motor. Which of the following materials will be the best conductor for Amber’s motor?

a. A copper wireb. A rubber bandc. A glass rodd. A neon bulb

Answer

A) A copper wire

A scientist wants to study the effects of acid rain on the water quality in a lake. Which of the following pieces of equipment would be most useful to the scientist?

a. pH meterb. barometerc. GPSd. Dissolved oxygen meter

Answer

A) pH meter

Where is the majority of Earth’s freshwater located?

a. Riversb. Lakesc. Groundwaterd. Glaciers

Answer

D) Glaciers

Approximately 70% of Earth’s surface is covered with water. What percentage of this water is salt water?

a. 67%b. 77%c. 87%d. 97%

Answer

D) 97%

Which of the following structures is responsible for breaking down water and worn-out cell parts?

a. Ribosomeb. Vacuolec. Lysosomed. Mitochondrion

Answer

C) Lysosome

Which of the following statements is not a characteristic of a living thing?

a. Must be able to breatheb. Must be made of cellsc. Must be able to grow and reproduced. Must be able to respond to its environment

Answer

A) Must be able to breathe

Mitochondria bread down food and release energy for the cell. In which type of cell would you expect to find the most mitochondria?

a. Skin cellsb. Muscle cellsc. Nerve cellsd. Fat cells

Answer

B) Muscle Cells

Which of the following is a poor conductor of heat?

a. Metalsb. Metalloidsc. Nonmetalsd. Electrons

Answer

C) Nonmetals

Why is drinking water treated before it is pumped to homes?

a. To kill microscopic organisms that could make people sick

b. To make sure that it tastes goodc. To make sure that the water is cleard. To add microscopic organisms that will make

the water safe to drink.

Answer

A) To kill microscopic organisms that could make people sick