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152025510Up andAtomParticles in MotionWhats the MatterWhat a Great CombinationMatter and Energy in Living Systems555510101010151515152020202525252520Big Board Facts12Team Scores3456Big PointsQuestion08Today'sTopicsNEXTBig Points

The mass is the same. It follows the Law of Conservation of Mass: Mass is neither created nor destroyed.

Back to BoardParticlesIn MotionNEXTWhats theMatter?NEXTNEXTWhat a GreatCombinationMatter and Energy in Living SystemsNEXTTopic 1Question for 5 PointsShow Answer

Which label points to the nucleus? EXPLAIN!Topic 1Answer for 5 PointsBack to Board

The nucleus is in the center surrounded by the electron cloud. It is made of protons (positive charge) and neutrons (no charge).

Show AnswerTopic 3Question for 15 PointsBrandon is trying to identify the type of metal that makes up four rectangular metal cubes. He found the density of a cube of iron that has a mass of 15.6 g and a volume of 2.0 cm3. He determines the mass and volume of each unknown.

Which unknown sample is most likely to be iron? (The equation for density is D = m/V)Unknown AUnknown BUnknown CUnknown D

Topic 1Question for 15 Points

Any atom that has 13 protons is an aluminum atom. Which statement best describes what would happen if a proton were added to an aluminum atom? EXPLAIN!

The atom would lose electrons.The atom would have a negative charge.The atom would no longer be aluminum.The atom would have a smaller atomic number.

Show AnswerTopic 4Question for 20 PointsShow AnswerNitrogen gas is the most common gas found in the atmosphere.

Which statement is a correct description of nitrogen gas? EXPLAINIt is a compound because it contains two bonded atoms.It is a compound because it has a specific chemical formula.It is not a compound because it contains only one chemical bond.It is not a compound because it contains only one type of atom.Topic 5Question for 25 PointsShow Answer.Our Sun is one of billions of stars in the Milky Way galaxy. The sun orbits the Milky Way about once every 226 million years. If the Sun was formed about 4.6 billion years ago, about how many orbits has the Sun completed since it formed?

A. 20 B. 50 C. 70 D. 100

Topic 1Answer for 20 PointsBack to Board

B. Many compounds can be made by different combinations of the same elements.Atoms can combine in many different ways to create different compounds (ex: hydrogen and oxygen) H2O water or H2O2 hydrogen peroxideTopic 2Question for 5 PointsShow Answer

Victoria drew a diagram to model the states of matter. Which beaker(s) contain particles that best represent a gas? EXPLAIN!2 only3 only1 and 21 and 3Topic 3Question for 5 PointsShow AnswerLuis wants to compare the density of three solid objects that are different shapes and sizes. What information does he need to make the comparison? EXPLAIN

how flat or round each object isthe relative weights of the objectsthe mass and volume of each objecthow opaque or transparent each object isTopic 4Question for 5 PointsShow AnswerThe label on a chemical in a science laboratory reads, Strong Acid. Based on this label, what can a student best determine about the chemical? EXPLAIN

It has a low pH.It is a clear liquid.It has a high density.It has a low melting point.Topic 5Question for 5 PointsShow AnswerGreen plants and algae make their own food through photosynthesis. What is photosynthesis?

a cell process that uses energy from sunlight to convert water and oxygen into fooda cell process that uses energy from sunlight to convert water and glucose into fooda cell process that uses energy from sunlight to convert water and chlorophyll into fooda cell process that uses energy from sunlight to convert water and carbon dioxide into foodTopic 2Question for 10 Points

Jorge is pouring water from a bottle into a glass. In a model, how should the particles of water move to explain why water flows from a liquid to a glass? EXPLAIN!They should be sliding past each other at all times.They should not move at all until the water is poured.They should be move very quickly in one place at all times.They should be moving freely in all directions when the water is poured.Show AnswerShow AnswerTopic 3Question for 10 PointsCamila is testing the thermal conductivity of different materials. She places four spoons in a bowl as shown in the picture below and touches the handle of each spoon after 60 seconds. EXPLAIN

Which spoons should she classify as thermally conductive?the plastic spoon and the silver spoonthe wooden spoon and the plastic spoonthe stainless steel spoon and the wood spoonthe silver spoon and the stainless steel spoonTopic 4Question for 10 PointsShow AnswerChad adds several drops of oil to a sample of water.

Which of the following does Chad make? EXPLAINmixturesolutioncompoundpure substanceShow AnswerTopic 5Question for 10 PointsThe diagram below shows an energy pyramid. In a marine ecosystem, algae carry out photosynthesis. Barracuda eat snapper fish. Reef sharks eat barracuda.

Which organism would be at the top of the energy pyramid? EXPLAIN.

algaebarracudareef sharksnapper fishTopic 2Question for 15 PointsShow Answer

Which area of the diagram represents the conditions when particles are in motion? 2 B. 3 C. 5D. 7Topic 4Question for 15 PointsShow AnswerAllan completes an experiment by adding different substances to water and observing whether each substance dissolves. Which substance would form a solution when added to water? EXPLAIN

sandsugarsawdustiron filingsTopic 5Question for 15 Points

Show AnswerEnergy is transferred between certain organisms in an ecosystem. Which of these statements explains why the sea grass is a producer? EXPLAIN.

It uses energy from the sun to make food. It creates energy needed by the ecosystem.It is eaten by other organisms.It releases nutrients into the soil.Show AnswerTopic 3Question for 20 PointsKeesha measured the mass of the block shown below to be 810 grams (g). EXPLAIN

What is the density of the block? The equation d = m/V is used to calculate density.2.7 g/cm327 g/cm338.6 g/cm3243,000 g/cm3Topic 2Question for 20 PointsAisha is using a computer model to explore what happens to the particles in water when it changes from a liquid to a gas. What will the model show about the motion of liquid water and water vapor?EXPLAIN!The motion of the particles is the same in both states, but they move faster in the gas state.The particles in the liquid do not move, but the particles in a gas can move back-and forth.The particles in a gas can slide past each other, while the particles in a liquid are locked in place.The particles in a liquid can slide past each other, while the particles in a gas are free to move in all directions.Show AnswerTopic 3Answer for 5 Points

The mass and volume of each object because:Density = Mass / Volume

Back to BoardTopic 4Question for 25 PointsShow AnswerA student makes a model of ozone and water.

Which statement correctly classifies ozone and water? EXPLAINOzone and water are both compounds.Water is a compound, but ozone is not.Ozone is a compound, but water is not.Neither ozone nor water are compounds.

Topic 3Question for 25 Show AnswerMatt has a blue balloon and a red balloon that are the same volume but filled with different gases. The red balloon floats in air, but the blue balloon does not float in air. How does the density of the gas in the balloons compare to the density of the surrounding air?

The gases in both balloons are less dense than air.The gas in the red balloon is less dense than the air and the gas in the blue balloon is more dense than air.The gas in the blue balloon is less dense than the air and the gas in the red balloon is more dense than air.The gases in both balloons have the same density as the air.Topic 2Question for 25 Points

Liam is building a model of the particles in liquid iron and solid iron. He uses plastic foam balls to represent the particles. How should he connect the balls in the model of solid iron to show the motion of the particles?They should be connected with springs.They should be connected with wooden sticks.They should be glued together in an orderly way.They should be placed in a clear box, but not connected.

Show Answer

Unknown CTopic 3Answer for 15 PointsBack to Board

Topic 5Question for 20 PointsShow AnswerPlants can provide the materials that animals use in cellular respiration, and animals can provide some of the materials needed by plants for photosynthesis. This image shows the relationship.

According to the diagram, which of these materials does cellular respiration provide that plants can use in photosynthesis? EXPLAIN.ATPcarbon dioxidechloroplastsMitochondria

The "Big Points"QuestionShow QuestionTopic 3Question for 25 PointsB. The gas in the red balloon is less dense than the air and the gas in the blue balloon is more dense than air.

Back to BoardTopic 4Answer for 5 Points

It has a low pH. Acids have a pH below 7.

Back to BoardTopic 4Answer for 10 Points mixture because the oil will never be completely dissolved and we can easily separate them.Back to Board

Topic 4Answer for 15 Points

B. Sugar. It will dissolve completely in water.Back to BoardTopic 4Answer for 20 Points

C. It is not a compound because it contains only one type of atom.Back to Board46Back to BoardTopic 4Answer for 25 Points

B. Water is a compound, but ozone is not. D. a cell process that uses energy from sunlight to convert water and carbon dioxide into food.Topic 5Answer for 5 PointsBack to BoardTopic 5Answer for 10 PointsBack to Board C. reef sharkThe reef shark is at the top of the energy pyramid because there is nothing else, in this question, that consumes (eats) it. It uses energy from the sun to make food.

Producers (plants) absorb the suns energy and combine it with water and carbon dioxide to make glucose (sugar). The glucose is then changed and used as food by animals.Topic 5Answer for 15 PointsBack to Board

Animals give off carbon dioxide and plants absorb carbon dioxide. Topic 5Answer for 20 Points B. carbon dioxide

Back to Board

D. Animals store glucose in cells.

Animals use or store 90% of the energy that they get from glucose. The other 10% of the energy is transferred up the food pyramid.Topic 5Answer for 25 PointsBack to BoardBig PointsQuestionShow Answer302928272625242322212019181716151413121110987654321

James blows up a balloon. The mass of the balloon and the air is 6 g. The diameter of the balloon is 12 cm. He heats the balloon gently. As the temperature of the air increases, the balloon expands to 15 cm. How has the mass of the air been affected by the addition of heat to the balloon? EXPLAIN

The mass is less.The mass is greater.The mass is the same.There is no way to measure the change in mass.