Which substance is NOT soluble in water?
A. Powdered drink mix
B. Sugar
C. Salt
D. Sand
What is answer D. Sand
100
Which substances, when mixed together, maintain their original physical properties?
A. Gravel, sugar, water
B. Wood chips, water, sand
C. Sand, sugar, water
D. Water, pepper, sugar
What is B. Wood chips, water, sand
100
Which of the following can cause water to change from solid to liquid?
A. Time and temperature
B. Time and volume
C. Temperature and volume
D. Weather and volume
What is A. Time and temperature
100
Which statement below best describes how energy flows in a food chain or food web?
A. Energy from the Sun is used by consumers and transferred to produces and decomposers.
B. Energy from the Sun is used by producers and transferred to consumers and decomposers.
C. Energy from the Sun is used by decomposers and transferred to producers and consumers.
D. Energy from the Sun is used by producers and transferred to scavengers and decomposers.
What is answer B. Energy from the Sun is used by producers and transferred to consumers and decomposers.
100
Which of the following processes of the water cycle describes how water is continuously moving through the environment by plants releasing water form leaves?
A. Condensation
B. Transpiration
C. Respiration
D. Precipitation
What is answer B. Transpiration.
200
Students have two blocks that are the same size. They drop each block into a beaker of water. Why does Block 1 float and Block 2 sink?
A. Block 1 is made of a different material than Block 2.
B. Block 1 is smaller than Block 2.
C. Block 2 absorbs more water than Block 1.
D. Block 2 has less mass than Block 1.
What is answer A. Block 1 is made of a different material than Block 2.
200
Which mixture can be separated using a filter?
A. Sand and iron filings
B. Saltwater
C. Sand and water
D. None of the above
What is C. Sand and water
200
Ice cream is left out of the freezer for several hours. it changes from a solid to a liquid. This change is most likely caused by--
A. Adding cool air
B. Taking away heat
C. Adding heat
D. An air conditioner unit
What is C. Adding heat.
200
Which statement correctly describes the role of bacteria as part of the food chain?
A. Bacteria are decomposers that break down waste and remains of dead animals and plants.
B. Bacteria cause plant and animal illnesses which are always harmful to the environment.
C. Bacteria are predators which catch and consume their prey.
D. Bacteria are producers that make their owns food from the Sun's energy.
What is answer A. Bacteria are decomposers that break down waste and remains of dead animals and plants.
200
What causes an increase in the oxygen level in the atmosphere?
A. Oxygen released by plants
B. Oxygen taken in by plants
C. Oxygen released by animals
D. Oxygen inhaled by animals.
What is answer A. Oxygen released by plants.
300
Which tool can be used to compare the mass of a large rock to the mass of two wooden blocks?
A. Graduated cylinder
B. Thermometer
C. Spring scale
D. Pan balance
What is D. Pan balance
300
Which tools are best for separating a mixture of sand, iron filings, and water?
A. Hot plate and filter
B. Tweezers and filter
C. Filter and magnet
D. Magnet and hot plate
What is C. Filter and Magnet
300
Students investigate changes in states of matter caused by heating and cooling. How can the reliability of the results be increased?
A. Repeat the investigation
B. Communicate valid conclusions
C. Organize the information
D. Create a data table
What is A. Repeat the investigation
300
Several animals are kept as pets in the classroom. Students are responsible for feeding, watering and cleaning their cages. What rule best reflects the science safety rule students should remember to do upon entering the room?
A. Sharpen pencils
B. Write in science notebooks
C. Visit quietly with neighbors until the bell rings
D. Ask permission before working with the animals.
What is answer D. Ask permission before working with the animals.
300
Which method would be most effective for students to display the continuous movement of water through the water cycle?
A. Table
B. Graph
C. Pie chart
D. Diagram
What is answer D. Diagram.
400
Which combination, after mixing, retains its original physical properties?
A. Vinegar and baking soda
B. Oil and water
C. Salt and water
D. Food coloring and water
What is B. Oil and water
400
A student makes a drink stirring lemon juice and sugar into a glass of water. Why is this drink considered a solution?
A. The lemon juice and sugar change the taste of the water.
B. The water changes color.
C. The lemon juice and sugar dissolve in the water.
D. The student stirs the mixture.
What is C. The lemon juice and sugar dissolve in the water.
400
Students observe the changes that occur when substances are heated. Which of the following is NOT an accurate observation?
A. When chocolate is heated, it melts.
B. Heating cheese causes the particles to move slower.
C. Ice melts when heated
D. When ice is heated, the particles move to a more active state.
What is answer B. Heating cheese causes the particles to move slower.
400
Why is the Sun an important factor in the transfer of energy in an ecosystem?
A. The Sun supplies nutrients to consumers to be transferred to producers.
B. The Sun supplies energy to consumers so they can create their own food.
C. The Sun provides energy to producers so they can create their own food.
D. The sun provides nutrients so consumers and scavengers can create their own food.
What is answer C. The Sun provides energy to producers so thy can create their own food.
400
What is the relationship of plants and animals within the carbon dioxide-oxygen cycle?
A. Plants take in carbon dioxide needed by animals, and animals release oxygen needed by plants.
B. Pants release oxygen needed by animals, and animals release carbon dioxide needed by plants.
C. Animals inhale oxygen needed by plants, and plants release carbon dioxide needed by animals.
D. All of the above.
What is answer B. Plants release oxygen needed by animals, and animals release carbon dioxide needed by plants.
500
Which physical property of water changes when it reaches its melting point?
A. Color
B. Shape
C. Volume
D. Mass
What is B. Shape
500
During an experiment in class, several students make statements about solutions. Which statement in NOT true?
A. When sugar dissolves in water, the sugar is evenly distributed throughout the solution.
B. Solutions can be classified as mixtures.
C. Heating the water first causes salt to dissolve quicker.
D. When salt is dissolved in water, parts of the solution taste salter than others.
What is D. When salt is dissolved in water, parts of the solution taste saltier than others.
500
Students are making Jell-O in class. What will happen to the liquid when it is cooled?
A. The liquid will evaporate
B. The physical state will change from liquid to solid
C. The physical state will remain a liquid
D. The physical state will change form a liquid to a gas.
What is answer B. The physical state will change from liquid to solid.
500
A food web is a more realistic model of the flow of energy through an ecosystem than a food chain because --
A. Most organisms depend on more than one species for food.
B. Each organism in a food chain represents multiple feedings.
C. Most organisms depend on just one species for food.
D. Each organism in a food web represents a single feeding.
What is answer A. Most organisms depend on more than one species for food.
500
Which statement about the differences between complete metamorphosis and incomplete metamorphosis is NOT correct?
A. Both have four stages.
B. Both have an egg stage.
C. Both have an adult stage.
D. Both are cycles of insects.