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Ariana uses balloons to investigate static electricity. Which of the following best explains what will happen when she brings two positively charged balloons close to each other?
A. The balloons will move apart.
B. One balloon will lose its charge.
C. The balloon swill come together.
D. One balloon will gain a negative charge.
A. The balloons will move apart.
Erosion and weathering can both cause changes to the surface of Earth. Which of the following happens only because of erosion?
A. Rocks form deep underground.
B. Rocks become smooth and round.
C. Rocks are broken apart into small pieces.
D. Rocks are moved from one place to another.
D. Rock are moved from one place to another.
Which of the following best describes an asteroid?
A. large chunk of rock that orbits the Sun in between the orbits of Mars and Jupiter
B. large chunk of glowing rock and ice that floats in space
C. large chunk of dust and clay that is found on Earth's surface
D. large chunk of sand that is found on the surface of Venus
A. large chunk of rock that orbits the Sun in between the orbits of Mars and Jupiter
Iowa and Florida have different climates. Iowa is farther north than Florida. It is not near any large body of water. its average elevation is 1100 feet. Florida is bordered by an ocean and a gulf. Its average elevation is 100 feet. How do these factors affect their climates?
A. Iowa's elevation and latitude give it a wider range of temperatures.
B. Iowa's lack of nearness to water and latitude make its climate mild.
C. Iowa's latitude and lack of nearness to water make it cooler than Florida.
D. Iowa's elevation and lack of nearness to water keep it warmer than Florida.
A. Iowa's elevation and latitude give it a wider range of temperatures.
Joshua and Devin are comparing and analyzing data from their toy car racing trials. When they ran the trials for car speed, what were Joshua and Devin measuring?
A. the distance each car traveled
B. the amount of time each car traveled
C. the distance each car traveled in a certain amount of time
D. the distance each car traveled in 5 minutes
C. the distance each car traveled
The stem is an important part of many plants. Which of the following is most similar to the role performed by the stem of a plant?
A. an anchor holding a boat in place
B. a snack company producing energy bars
C. a colorful sign attracting people into a store
D. an elevator transporting supplies from one floor to another
D. an elevator transporting supplies from one floor to another
Astronomers study many different kinds of objects in our Solar System. Which of the following best describes a difference between comets and asteroids?
A. Comets orbit planets, and most asteroids orbit the Sun.
B. Comets are hot balls of gas, and asteroids are made mostly of ice.
C. Comets are made mostly of ice, and asteroids are made mostly of rocks.
D. Comets orbit the Sun between Mars and Jupiter, and asteroids form patterns in the sky.
C. Comets are made mostly of ice, and asteroids are made mostly of rocks.
What process occurs when bits of rocks are carried away by flowing water?
A. deposition
B. landslide
C. erosion
D. weathering
C. erosion
Which statement explains a way that the water cycle connects Earth's freshwater and saltwater?
A. Precipitation runs off the land, collects in rivers, and empties into the ocean.
B. Rain falls and refills lakes, ponds, and rivers.
C. Precipitation falling on a river makes it deeper.
D. All water evaporates and eventually becomes precipitation over the ocean.
A. Precipitation runs off the land, collects in rivers, and empties into the ocean.
Animals and plants have parts that are similar in some ways and different in others. Which of the following best describes a difference between the nose of an animal and the leaves of plant?
A. The animal's nose takes in air, and the plants leaves do not.
B. The plants leaves make food, and the animal's nose does not.
C. The animals nose takes in sunlight, and the plant's leaves do not.
D. The plant's leaves provide support, and the animal's nose does not.
A. The animal's nose takes in air, and the plants leaves do not.
Roger collected four rock samples and wrote a description of how each was formed. Which of the following rocks that Roger collected is a metamorphic rock?
A. Formed from magma that cooled slowly
B. Formed by pressure and heat over time
C. Formed from lava that cooled quickly
D. Formed by pieces of rock cemented together
D. Formed by pressure and heat over time
The organisms show n below live in or near bodies of water. Some are classified as vertebrates and some as invertebrates.
Which organism is classified as an invertebrate?
A. Crab
B. Fish
C. Manatee
D. Turtle
A. Crab
Which of the following best describes the sudden movement of rock and dirt down a hill?
A. erosion by wind
B. erosion by gravity
C. weathering by wind
D. weathering by gravity
A. erosion by wind
Salt dissolves very easily in water. Which of the following best describes what happens when salt dissolves in water?
A. The particles of both substances become evenly spread apart.
B. The salt particles change into a different kind of particle.
C. Salt particles attach to the water particles.
D. A new substance with new properties forms.
A. The particles of both substances become evenly spread apart.
Certain squirrels in northern states hibernate in winter, while the squirrels in Florida do not hibernate. Which of the following best explains why the squirrels behave differently?
A. The norther squirrels have more fat to live on than the Florida squirrels do.
B. THe northern squirrels can dig burrows more easily than the Florida squirrels can.
C. In winter, it is colder and harder to find food in the northern states than it is in Florida.
D. In winter, the Florida squirrels can hide from predators more easily than the northern squirrels can.
A. The northern squirrels have more fat to live on than the Florida squirrels do.
Mr. Washington mixed iron filings with sand. Then, he asked his students to separate the iron filing from the sand. Which of the following is the best tool to use to separate the iron filings from the sand?
A. Hand lens
B. Bar Magnet
C. Test Tube
D. Eyedropper
B. Bar Magnet
Omar decided to crossbreed daisy plants. He set up a careful schedule to manage his data. After three different control groups of plants to compare to those he worked with. He established a variable. After three different crossbreeds were performed, he realized he had forgotten one part of the experiment. What was it?
A. He had the wrong variable.
B. He never decided what question he was trying to answer.
C. He had all the wrong data.
D. His conclusion did not match his hypothesis.
B. He never decided what question he was trying to answer.
Quartz reflects light differently than talc does. Which property of these minerals is being compared?
A. cleavage
B. luster
C. hardness
D. streak
A flamingo's feathers are made ofmatter from the food it eats. Which of the following best supports the claim that food a red bird eats has suffered a chemical change?
A. The flamingo eats only yellow seeds.
B. The flamingo eats only solid foods.
C. The flamingo eats shrimp.
D. The flamingo breaks up its food with its beak.
The flamingo eats shrimp.
Because consumers cannot make their own food,m they must get energy from other consumers or producers. Which of the following statement describes and event in which evergy stored in a producer is passed to a consumer?
A. A deer eats a shrub.
B. An alligator consumes a sunfish.
C. Fungus grows in soil under a tree.
D. A group of vultures feed on a dead lion.
A. A deer eats a shrub.
Jenny measures the outside temperature as 16 degrees Celsius, 61 degrees Fahrenheit. She observes precipitation falling from the clouds in a solid form. What type of precipitation is Jenny most likely observing?
A. hail
B. rain
C. sleet
D. snow
A. hail
Two teams of scientists are both working on developing a drug that will cure Alzheimer's disease. One team is working in France and other is working in America. At a conference, they learn that both are doing experiments that are almost the same. What should they do to make sure their experiments could be compared effectively?
A. Organize a third team that will try other experiments
B. Wait until all their research is complete
C. tell each other their secrets
D. make sure the conditions of both experiments are the same
D. make sure the conditions of both experiments are the same
Which of these statements correctly describes how water on Earth is cycled?
A. Water condenses in reservoirs and collects in clouds as precipitation
B. Water evaporates because of energy from the Sun and condenses due to gravity.
C. Freshwater evaporates from the ocean, condenses in clouds, and falls as freshwater.
D. Freshwater runs off into the ocean, where it condenses to become saltwater.
C. Freshwater evaporates from the ocean, condenses in clouds, and falls as freshwater.
Anna pushes a toy car across the floor. The car moves in a straight path. Which of the following changes as Anna pushes her car?
A. the car's mass
B. The car's length
C. The car's position
D. The car's direction
C. The car's position
Matter can exist in different physical states depending on pressure and temperature. Which of these choices shows matter arranged from the lowest temperature to the highest temperature?
A. liquid water, solid water, water vapor
B. water vapor, liquid water, solid water
C. solid water, liquid water, water vapor
D. solid water, water vapor, liquid water.
C. solid water, liquid water, water vapor