Show:
Earth Science
Space Science
Earth and Physical Sciences mixed
Life Sciences
Physical Sciences
100
What type of biome is a savanna? A. a region with poor soil, high amounts of rainfall B. a temperate region with many cone-bearing trees and shrubs C. a region with few trees due to cold temperatures and short growing seasons D. a grassland with many herbs and shrubs and a small number of trees
What is D. a grassland with many herbs and shrubs and a small number of trees
100
Astronomers think that the Milky Way galaxy is most likely what sort of galaxy? A. spiral B. irregular C. elliptical D. nebular
What is A. spiral
100
Which of these biomes usually receives the least precipitation in a year? A. tropical rain forest B. grassland C. polar D. savanna
What is C. polar
100
Which or the following structures can be found in the plant cell but not in the animal cell? A. vacuoles B. endoplasmic reticulum C. mitochondria D. cell wall
What is D. cell wall
100
A battery and a head of lettuce are both sources of….. A. kinetic energy B. chemical potential energy C. solar energy D. electrical energy
What is B. chemical potential energy
200
Which of the following events is not part of the carbon cycle? A. volcanic eruption B. rainfall C. a forest fire D. an animal breathing
What is B. rainfall
200
Which of the following is most directly responsible for the phases of Earth's Moon? A. the Moon's rotation about its axis B. the Moon's revolution around the Earth C. the Earth's rotation about its axis D. the Earth's revolution around the sun
What is B. the Moon's revolution around the Earth
200
Which of the following best describes the rock cycle? A. weathering of rocks at the Earth's surface, forming sediments that are then buried, and sometimes compacted and heated and formed into new rock B. the mixing and churning of rocks caused by glaciers C. erosion of rocks at mountaintops, which are then carried downstream to form gravel beds in streams and rivers D. mountain formation by the crustal plates, which pushes up the ancient seafloor to form mountain ranges
What is A. weathering of rocks at the Earth's surface, forming sediments that are then buried, and sometimes compacted and heated and formed into new rock
200
Which of the following could cause an increase in the population of wolves in an ecosystem? A. lower birthrates in the wolves' main prey species B. a shorter growing season C. a lack of disease in the wolves' main prey species D. a very harsh winter
What is C. a lack of disease in the wolves' main prey species
200
Which of the following changes doe not produce a new chemical substance? A. an iron nail rusts B. a cake bakes in an oven C. an apple rots D. a popsicle melts
What is D. a popsicle melts
300
Which of the following processes directly lead to the formation of igneous rocks? A. melting and cooling B. weathering and erosion C. extreme weather conditions D. gluing and cementation
What is A. melting and cooling
300
Which of the following objects in the solar system would most likely have an orbit perpendicular to the plane of Earth's orbit? A. an asteroid B. a comet C. another planet D. a moon
What is B. a comet
300
When the forced acting on an object are unbalanced, which of the following is true? A. the speed of the object's motion is the only quality changing B. the direction of the object's motion is the only quality changing C. The object's speed and direction might both be changing D. the object is moving faster relative to the ground
What is C. The object's speed and direction might both be changing
300
If an organism is found to have chloroplasts within its cells, what would you assume about that organism? A. it is a mammal B. it can be found in the rain forest C. it can provide its own food D. it does not need to respire
What is C. it can provide its own food
300
Which of the following is the best definition of the concept of motion? A. motion is the change in an object's speed and direction over time B. motion is the change in an object's position over time C. motion is a form of energy that can be created or destroyed D. Motion is a form of energy caused by the action of unbalanced forces
What is B. motion is the change in an object's position over time
400
Landforms result from a combination of constructive and destructive forces. One destructive force that acts to change the landscape is…. A. crustal deformation B. metamorphic rock formation C. erosion D. the deposition of sediment
What is C. erosion
400
Which of the following best describes the orbits of most asteroids around the sun? A. most asteroids orbit the Sun in a belt that is in the same plane as the plants' orbits B. most asteroids orbit the sun in a belt that is perpendicular to the plane of the planets' orbits C. most asteroids have wildly different orbits from each other and the planets D. Asteroids do not orbit the sun
What is A. most asteroids orbit the Sun in a belt that is in the same plane as the plants' orbits
400
Which of the following best describes the changes to the entire system as the water turns from liquid to gas? A. as heat energy is added, potential energy increased and density decreases B. as heat energy is added, kinetic energy increases and density decreases C. as heat energy is added, kinetic energy increases and volume decreases D. as heat energy is added, thermal energy decreases and volume decreases
What is B. as heat energy is added, kinetic energy increases and density decreases
400
In a mountain habitat, the population of mountain goats has increased sharply. The goats are destroying the vegetation, which is causing the soil to erode. In this case, what effect have the biotic factors had on the abiotic factors? A. The biotic factors have caused the introduction of a new species B. the biotic factors have caused on overpopulation of goats C. the biotic factors have led to destruction of the vegetation D. the biotic factors have led to erosion of the soil
What is D. the biotic factors have led to erosion of the soil
400
Which of the following would not be effective in converging natural resources? A. a power company asks its customers to limit their use of air conditioners on very hot days B. a power plant finds a mining company that will sell coal to the power plant for a lower price C. Erin's father changes the oil in the family car and takes the old oil to a place where it can be filtered and used again D. Susan collects the old newspapers in the family room and teaks them to the recycling center
What is B. a power plant finds a mining company that will sell coal to the power plant for a lower price
500
The theory of plate tectonics claims that there are about a dozen huge plates that make up the Earth's surface, and that the oceans and continents move about as these plates interact with each other. According to this theory, what mechanism is responsible for driving these plates? A. tidal forces from the Moon and the sun B. energy from the Earth's rotation C. uneven temperatures in the crust that cause the plates to expand and contract D. convection currents of plastic rock in the Earth's mantle
What is D. convection currents of plastic rock in the Earth's mantle
500
Distance in space are measured in light-years. One light-year is the distance that light travels in 1 year. What does it mean to say that we see a star that is 30 light-years away? A. the star will shine for 30 more years before reaching the end of its life cycle B. it would take 30 years of travel in a spacecraft to reach this star C. it takes 30 years for the light from that star to reach Earth D. The star experiences 30 years by the time Earth experiences 1 year
What is C. it takes 30 years for the light from that star to reach Earth
500
Just before the water began boiling, it had a mass of 0.75 kg. After 10 minutes, two thirds of the water boiled away. What is most likely the combined mass of the liquid and the gas? A. 0 kg B. 0.25 kg C. 0.5 kg D. 0.75 kg
What is D. 0.75 kg
500
The process of budding is best described as… A. sexual reproduction, with genetically identical offspring B. asexual reproduction, with genetically identical offspring C. sexual reproduction, with genetically different offspring D. asexual reproduction, with genetically different offspring
What is B. asexual reproduction, with genetically identical offspring
500
Which of the following reduces the use of a nonrenewable resource? A. driving a car that gets high gas mileage B. recycling paper C. using less electricity generated by wind power D. using less electricity generated by hydroelectric power
What is A. driving a car that gets high gas mileage