At some places in Florida, sand on the beaches is being reduced. New sand is brought from other areas and spread on the beaches. What process causes this reduction to the beach sand?
A earthquakes
B erosion
C landslides
D weathering
B erosion
Clover → Grasshopper → Frog → Snake → Owl
A Clover would decrease.
B Frogs would increase.
C Grasshoppers would increase.
D Owls would increase
B Frogs would increase.
An electric bulb will stop shining when a light switch is shut off because
A it draws electrons away from the light.B it inserts a semiconductor.
C it creates a gap in the circuit.
D it reverses the direction of the current.C it creates a gap in the circuit.
Which object below converts electrical energy to heat?
A a ceiling fan
B a toasterC a television
D a candle
What happens to colored sugar when it is added to water?
A The sugar reacts and colors the water.
B The sugar becomes white and the water changes color.C The sugar evaporates and the water changes color.
D The sugar dissolves and colors the water.D The sugar dissolves and colors the water
Which land feature is MOST likely the result of a glacier?
A large, arid desert
B deep, bowl-shaped lake
C long crack in the ground
D volcanic mountain rangeB deep, bowl-shaped lake
Which statement BEST explains why few plants grow on a tropical rainforest floor?
A Heavy rains fall throughout the year.
B Temperatures in a tropical rainforest stay warm.C Many different kinds of animals live on a rainforest floor.
D Layers of trees keep sunlight from reaching the forest floor.
D Layers of trees keep sunlight from reaching the forest floor.
Sue is making an electrical circuit using a battery and three light bulbs. The circuit is correctly linked in SERIES. Which will happen if one of the lights burns out?
A A short circuit will occur.
B Current flow will continue, but the burnt out light will not shine.C Only the burnt out light will not shine.
D None of the lights will shine.
D None of the lights will shine.
The transfer of thermal energy from one object to another is known as
A heat.
B electricity.C magnetism.
D temperature.
A heat.
A group of students weighed a sealed jar full of heavy cream. Then they shook the jar until the cream separated, and then they weighed the jar again. Which of the following would BEST describe its weight?
A The jar will have gained weight because some liquid changed to a solid.
B The jar will have gained weight because shaking added energy to it.
C The jar will have lost weight because of friction from shaking the liquid.
D The jar will have kept the same weight because it did not gain or lose any matter.
D The jar will have kept the same weight because it did not gain or lose any matter.
Which of the following is NOT a kind of physical weathering?
A freezing and thawing
B exfoliation
C oxygen
D plantsC oxygen
Pond ecosystems depend on the water cycle to ensure the survival of the animals that live in or near the pond. If a drought reduces the water level, which population of animals would be MOST affected?
A duck
B fish
C mouse
D snake
B fish
Sandra washed her hair. She dried it with warm air from a blow dryer before going to school. Which statement BEST explains why the blow dryer was able to dry Sandra’s hair quickly?
A The blow dryer used electricity.
B The blow dryer transferred heat.
C The blow dryer created sound waves.D The blow dryer used mechanical energy.
B The blow dryer transferred heat.
Sarah poured water into a tea kettle. She placed the tea kettle on a burner of an electric stove and turned the stove on. When the water began to boil, Sarah put some hot water into a cup with a tea bag. When was electricity converted into heat?
A pouring water into the kettle
B placing the kettle on the stoveC putting hot water into the cup
D boiling the water with the burnerD boiling the water with the burner
When you have a glass of water with ice, how does heat flow?
A from the glass to the air
B from the ice to the glass
C from the water to the iceD from the ice to the water
C from the water to the ice
The shape of a riverbed changes over time as a result of which gradual process?
A erosion
B dissolving
C plate shifting
D compaction
A erosion
Which adaptation allows plants to grow in an area such as the Arizona desert?
A fruit production
B Short growing season
C bright flowersD leaf shape
D leaf shape
The electrical energy that is generated at a power plant travels through wires to houses and businesses. Not all of the energy that is generated arrives at its destination, why is this?
A Some of the electrical energy is converted into motion in the wires.B Some of the electrical energy is converted into heat in the wires.
C Some of the electrical energy is converted into light in the wires.
D Not all of the electrical energy can travel in the wires.
B Some of the electrical energy is converted into heat in the wires.
Jake poured water into a pot. He put the pot on a stove and turned the stove on low. After a few minutes, the water in the pot began to boil. Which statement BEST describes why the water boiled?
A The stove transferred light to the pot of water.B The stove transferred electricity to the pot of water.
C The stove transferred heat energy to the pot of water.D The stove transferred mechanical energy to the pot of water.
C The stove transferred heat energy to the pot of water.
Liquid
Gas
Which of the following steps correctly explains an example of physical weathering (breaking rocks into smaller pieces)?
A Water moves particles over the rock and breaks the rocks into smaller pieces.
B Water moves into cracks, evaporates, and then breaks the rocks into smaller pieces.
C Water absorbs chemicals and turns into acid which breaks rocks into smaller pieces.
D Water moves into cracks, freezes, expands, and then breaks rocks into smaller pieces.
D Water moves into cracks, freezes, expands, and then breaks rocks into smaller pieces.
A population of deer recently increased in size. Which MOST likely could have caused the deer population to increase?
A A disease was spreading.
B Their habitat was destroyed.
C Food sources were hard to find.
D Their predators were disappearing.
D Their predators were disappearing.
Which of the following is an example of the transformation of electrical energy into energy of motion?
A an electric stove
B a television
C a car with an electric motorD a gas powered lawn mower
C a car with an electric motor
Which of the following BEST explains why most household light bulbs are too hot to touch?
A all of the electrical energy is converted to heat
B some of the electrical energy is converted to heat
C glass bulbs are conductors of electrical energy
D glass bulbs are insulators of light energy
The same amount of ice is added to four different jars. In which jar will the ice melt the fastest?
A Cold Water
B Hot Water
C No WaterD Warm Water