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BJH_Sci7_FFR2012
Brenham Junior High Fall Final Review 2012
| Question | Answer |
|---|---|
| Oxygen gas, orange juice, and a hammer are examples of _____________ because each has mass and volume. | matter |
| Green plants transform ________________ energy from the sun into chemical energy. | radiant |
| Two objects that have the same ___________ will have the same weight when they experience the gravitational force of the same planet. | mass |
| In the equation for photosynthesis, 6 molecules of carbon dioxide and 6 molecules of water produce _______ molecule(s) of glucose and 6 molecules of oxygen. | one |
| Plants make their own food using energy that comes from ____________________. | the sun |
| Almost all living things depend on the process of _________________________ to supply them with the energy they need. | photosynthesis |
| Some plants produce acids that result in ____________________ weathering. | chemical |
| Bacteria and fungi in soil are called ____________________ because they break down dead plants and animals releasing nutrients into the soil while releasing heat. | decomposers |
| Water and wind can ____________________ soil, or carry it away. | erode |
| Two factors that determine the rate of weathering are the type of rock and the _______________. | climate |
| The part of an ecosystem where an organism lives and feeds is called the organism's ____________. | habitat |
| All the biotic and abiotic factors in an area together make up a(n) ____________________. | ecosystem |
| Two abiotic factors that are needed for photosynthesis are sunlight and ____________________. | water |
| A lack of places to build nests is an example of ________ as a limiting factor for a population of birds. | space |
| Heterotrophs that obtain food and energy by eating other organisms are called _______________. | consumers |
| Mold and some bacteria are ____________________ that obtain energy by breaking down wastes and the remains of dead organisms. | decomposers |
| Catastrophic events such as hurricanes, which produce large waves and higher-than-normal tides, can speed up ____________________ of land along coasts. | erosion |
| Freshwater found in soil and rock layers below Earth's surface is called ____________________. | groundwater |
| Water vapor must condense into water droplets before ____________________ can form. | precipitation |
| The _________________________ is the continuous process by which water moves through the living and nonliving parts of the environment. | water cycle |
| The plants and algae that grow throughout a pond produce ____________________ needed by animals in the pond. | oxygen |
| Millions of people obtain their water from the Ogallala ____________________, a huge store of groundwater under the plains of the Midwest. | aquifer |
| The ____________________ in a wetland ecosystem capture the energy of sunlight through photosynthesis and store it as chemical energy in food. | producers |
| The atmosphere keeps Earth from being hit by most ____________________, which are chunks of rock from space. | meteoroids |
| On a mountaintop, a person runs out of breath quickly because fewer ____________________ molecules are present per cubic meter of air. | oxygen |
| The sun's energy comes from the process of ______________________________, in which hydrogen atoms form helium. | nuclear fusion |
| A rocket burns fuel to produce gases, which create a _________ that moves the rocket when expelled. (Newton’s 3rd Law) | force |
| Multistage _______________ make it possible to travel into space. | rockets |
| In space, _________________________ supply the oxygen astronauts need to breathe. | space suits |
| The energy role of a grizzly bear is that of a(n) ____________________ because it cannot make its own food. | consumer |
| An organism that eats only plants is a ____________________ consumer. | primary |
| A mouse in a food web is a first-level consumer when it eats grass, and a ___________________ consumer when it eats an insect. | secondary |
| The least amount of energy is available at the ____________________ level of an energy pyramid. | highest |
| ____________________ species such as lichens are the first to grow in an area with no soil. | Pioneer |
| The type of succession that occurs in an area where an ecosystem previously existed is called ____________________ succession. | secondary |
| Most of an animal's ____________________ consists of actions that help it survive or reproduce. | behavior |
| ____________ behavior is based on experience, which makes it different than instinctive behavior. | Learned |
| Many species of animals engage in courtship behavior, which ensures that males and females of the same ____________________ recognize one another. | species |
| The factor that probably accounts for the great biodiversity in coral reefs is their diversity of ____________________. | niches |
| Ecosystem tourism, or "ecotourism," is an example of the ____________ value of biodiversity. | economic |
| Suppose you are standing on a corner when a car moving toward the north passes you. If you use the car as a reference point, the direction in which you appear to be moving is toward the ____________________. | south |
| The statement that the motion of a hurricane is 20 kilometers per hour in an easterly direction is a description of the hurricane's ____________________. | velocity |
| When you hold a pencil and write, your hand exerts a ____________________ on the pencil. | force |
| If a person is traveling in a car that stops suddenly, the person keeps moving forward because of ____________________. | inertia |
| One ____________________ is the force required to accelerate one kilogram of mass at 1 meter per second per second. | newton |
| As the distance between 2 objects decreases, the gravitational force between them ______________. | increases |
| Work equals force times ________________. | distance |
| List lab equipment most useful for growing bacteria samples. ________________________________ | microscope, journal, petri dish, glass slide |
| Matter is recycled in a compost bin due to ______________ organisms. | decaying |
| _____________ are a piece of lab equipment which is helpful for protecting against spilled liquids and broken glass. | Goggles |
| List at least two pieces of lab equipment that should be available when working around an open flame. ____________________________________________ | fire extinguisher & fire blanket |
| When removing a keystone species, such as a plant, from an ecosystem many of the other species will ________________ in number. | decrease |
| When a mover helps move a couch upstairs, we know that _________ is being done because the couch is moved a distance. | work |
| If an astronaut studies a plant in space, the astronaut is most likely studying the effects of ____________ on the plant. | gravity |
| When lava flows down a mountain into the local reef system it will _____________ most of the reef animals. | destroy |
| Fire may spread ____________ in a grassland biome due to the respective lack of water in comparison to a tropical rain forest. | rapidly |
| If a drought hits Texas, deer are most likely to ___________ to find more food and water. | relocate |
| Sealing concrete for the winter in cold climates is wise because of a a type of _____________ weathering called ice wedging. | physical |
| Texas is losing biodiversity because the native Bobwhite quail are most threatened due to a loss of ___________. | habitat |
| The walls of the Grand Canyon were formed by water __________________. | erosion |
| A drought would negatively affect carnivores because there would be a(n) ______________ in the number herbivores. | decrease |
| When water ______________ in the air it falls as rain in a process called precipitation. | condenses |
| An ___________ is an underground layer of rock that holds water. | aquifer |
| Groundwater fills the cracks and space in underground soil and rock layers. Watersheds pick up _______________, from human activity, causing groundwater to become more dangerous to drink. | pollution |
| Due to Earth’s rotation, revolution, and tilt, Earth’s surface cannot maintain a _____________ temperature. | constant |
| Size, distance, and no asteroid belt are all ______________ to most solar system models. | limitations |
| You will have a greater biodiversity of _________ if there is more flora and other abiotic factors, such as water and rocks. | fauna |
| Many desert animals have _________________ helping them be more active at night because of their biome’s extreme temperatures. | adaptations |
| An ecosystems increase in biodiversity leads to a more ____________ environment helping it reach its climax community. | stable |
| Equilibrium is not present if an environment begins either ______________ or secondary succession. | primary |
| Beaches are formed by _________________ when waves drop of the sediment and beach rocks are broken down from physical weathering due to waves. | deposition |
| The hypothesis that Mars may once have had the conditions needed to support life is based in part on evidence that __________ __________ was once present. | liquid water |
| Microgravity affects an astronaut’s bone health by _______________ the amount of physical stress on bones, resulting in bone deterioration. | decreasing |
| When a non-native animal is introduced into an ecosystem at climax, it can form new natural enemies with existing organisms that did not have any natural _________. | enemies |
| The primary limiting factor of a __________ biome is its lack of water, less than 25 cm per year. | desert |
| Living cells contain sugar that they use for fuel. This sugar contains _______________ energy. | chemical |
| If a kestrel eats a mouse that eats grass, the kestrel is a(n) ________________ consumer. | secondary |
| Second-level consumers may be either carnivores or ______________. | omnivores |
| In an energy pyramid, the available energy ______________ at each feeding level compared to the level below. | decreases |
| Which land biome is extremely cold and dry? ____________ | tundra |
| A canopy, an understory, and an extremely high number of plant and animal species are characteristics of which biome? _______________________ | tropical rainforests |
| Ponds and rivers are two types of _______________ biomes. | freshwater |
| The series of changes that occurs after a disturbance in an existing ecosystem is called ________________ ________________. | secondary succession |
| Plants growing on a new island formed by the eruption of an undersea volcano are an example of ______________ ________________. | primary succession |
| The first time a bird builds a nest, the bird builds the nest perfectly. This kind of behavior is an example of an _________________ behavior. | instinctive |
| Protection against _______________ is a benefit of living in a group. | predators |
| A species that influences the survival of many other species is called a(n) _______________ species. | keystone |
| If you know the distance an object has traveled in a certain amount of time, you can determine the __________ of the object. | speed |
| Speed equals distance divided by ________. | time |
| If a bicyclist travels 30 kilometers in two hours, her average speed is __________. | 15 km/h |
| On a graph showing distance versus time, a ____________ line represents an object that is not moving at all. | horizontal |
| When a force changes an object's motion, the force is _______________. | unbalanced |
| Changing direction is a kind of _________________. | acceleration |
| The force of gravity on a person or object at the surface of a planet is known as ___________. | weight |
| As long as the forces acting on a system are exactly balanced, the system is said to be at ________________. | equilibrium |
| Plant stems tend to grow upward and the roots tend to grow downward because of the response to gravity known as __________________. | gravitropism |
Created by:
jeremyjohnston
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