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- 1. Multiple Choice
Which of these best describes the model?
1 molecule with 10 atoms
1 element with 10 molecules
10 molecules representing 10 elements
10 elements representing 10 molecules
- 2. Multiple Choice
Which statement best compares these two waves?
Wave 1 has a higher frequency because it has a longer wavelength than wave 2.
Wave 1 has a higher frequency because it has a higher amplitude than wave 2.
Wave 2 has more energy because it has a higher amplitude than wave 1.
Wave 2 has more energy because it has a higher frequency than wave 1.
- 3. Multiple Choice
Select two statements that would best explain the change in horses’ body mass over millions of years.
There was increased food availability.
There was decreased food availability.
Horses with larger body masses were less likely to survive and reproduce.
Horses with larger body masses were more likely to survive and reproduce.
Large body mass occurred in individuals as they became adults.
- 4. Multiple Choice
During the period when aurochs existed on Earth, they were preyed on by large predators. Some individual aurochs had stronger muscles than others. Using an understanding of natural selection, which statement explains why there would most likely be an increase in the stronger-muscle trait in a population of aurochs?
Individuals with stronger muscles have a large body mass, and they would be preyed on more than other aurochs.
Since having stronger muscles is an inherited trait, it would be passed on to every individual in the population that was not preyed on.
Individuals with stronger muscles would be more likely to run away from predators, and this trait would be passed on to their future offspring.
Since having stronger muscles would require individuals to consume more food, they would be more exposed to predators than the other aurochs.
- 5. Multiple Choice
Which organism is older: dinosaurs, plants, trilobites, birds, or mammals?
dinosaurs
plants
trilobites
birds
mammals
- 6. Multiple Choice
A population of organisms is studied by a scientist. The frequency of two traits in the population over time is shown
Which claim is best supported by the data?
Individuals with trait Y were always better able to survive and reproduce than individual with trait X
Individuals with trait X were always better able to survive and reproduce than individual with trait Y
The environment changed between years 1 and 2 causing individuals wit trait Y to be less successful than individuals with trait X.
The environment changed between years 3 and 4 causing individuals wit trait Y to be less successful than individuals with trait X.
- 7. Multiple Choice
Trent went skiing with his family. His mom and dad made him put on many different layers of clothing so that he would be warm while playing out in the snow. What did the layers of clothing act as?
conductor
friction
insulation
radiation
- 8. Multiple Choice
Jermaine and Lashonda each rub their dry hair with inflated balloons. While doing this, the other students notice that their hair is starting to stick straight out.
Next, the teacher takes the balloons and places them right next to one another. However, the balloons will not stay next to each other, as they normally would. Instead, they spring apart in opposite directions.
What is causing these balloons to push each other away?
There must be a vent in the classroom blowing the two balloons apart.
They have each gained negative charge from the hair rubbing, and like charges repel each other.
They have each gained negative charge from the hair rubbing, and like charges attract each other.
The rubber balloons are simply bouncing off each other the way a rubber ball bounces off the floor.
- 9. Multiple Choice
Lupe's family is moving into a new home. When Lupe looked at the yard with her dad, he said they would be planting some plants to help the environment. What is an ENVIRONMENTAL benefit of planting trees, bushes, and grasses?
Preventing erosion
Providing foods for wildlife
Preventing the accumulation of waste
Making the outside of a home look nice
- 10. Multiple Choice
The first glow sticks were patented by the US Navy in the 70's. They were called chemiluminescent signal devices. Today, glow sticks are still used by the military, emergency services, campers, divers and, of course, by kids for fun! The chemistry of a glow stick is pretty complicated. Sally's teacher let them experiment with glow sticks in science class. They bent the sticks, breaking the glass tube inside and the tubes began to glow bright colors. Eventually, though, the glow began to fade.
What is one way the students could prolong the life of their glow sticks?
Shake up the glow stick.
Heat the glow stick in hot water.
Put the glow stick in the freezer.
Take the glow sticks into a dark room.
- 11. Multiple Choice
Which is an example of a chemical change that occurs as part of the rock cycle?
lava cools and condenses on the Earth's surface
sedimentary rocks are worn away by water erosion
igneous rocks are cracked and broken into smaller pieces by weathering
sedimentary rocks are turned into metamorphic rocks by heat and pressure
- 12. Multiple Choice
20g of sugar is stirred into a beaker containing 100 g of water. After the sugar has completely dissolved, the solution is put on the scale. What is the mass of the solution ?
20g
80g
100g
120g
- 13. Multiple Choice
Oil, coal, natural gas, and uranium are used to generate electrical energy. What is true about ALL of them?
They are fossil fuels.
They are finite resources.
They are renewable resources.
They are an inexhaustible source of energy.
- 14. Multiple Choice
Boris puts ice cubes into a glass of water. The ice cubes begin to melt because
the water gains heat energy from the ice cubes.
the ice cubes gain heat energy from the water.
the warm air around the glass changes the temperature of the ice cubes.
the molecules in the ice cubes are moving faster than the molecules in the water.
- 15. Multiple Choice
One evening, Alex notes the Moon set in the west at around 8 PM. What would have been the approximate time of moonrise that day?
Midday, about 12 P.M.
Morning, about 8 A.M.
Early evening, about 5 P.M.
Early morning, about 5 A.M.
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