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Worksheets7th Grade Science End of Year Review
Total questions: 75
Worksheet time: 38mins
Colin watched the weather report on television. He saw the forecast for the coming week. He knows that the water cycle follows certain steps in a repeating cycle. When the sun heats water molecules, they increase speed and collide. On Sunday, he noticed that a puddle on the sidewalk was getting smaller over time. Which step in the water cycle would Colin predict is occurring?
Crystallization
Condensation
Evaporation
Precipitation
A certain area received a large amount of rain, and some of it remained on top of the soil. What happened to the rest of this water?
Evaporated
Absorbed by plants
Infiltrated into the ground
Condensed into clouds
Clouds are formed when water vapor...
Rises and cools
Falls and cools
Rises and heats
Falls and heats
Which of the following is an accurate example of how the water cycle can influence local weather?
Water in a lake soaks into the local groundwater system.
An increase in evaporation rates along a coastal area leads to afternoon thunderstorms.
An increase in an area's precipitation causes the area to experience a drought.
All of these
Ja’ron lives near a river that flows through farmland. He notices that the river has become more polluted over the years. The water that was once clear is now sometimes cloudy and has an unpleasant odor. What is the most likely cause of the pollution in the river?
Pesticides and fertilizer
Industrial waste
Oil and gasoline
Heat
In the water cycle, after water is precipitated back to Earth, it goes through the runoff stage in which it is collected into larger bodies. Which bodies of water does runoff include?
Streams
Lakes
Rivers
All of these
In general, surface water always flows…
Toward the equator
North to south
Downhill
South to north
A stream that flows into two different rivers is part of two
Reservoirs
Tributaries
Divides
Watersheds
Ken notices several patterns on a wind-belt map that shows how global winds travel. Which explains why global winds do not move in straight paths?
Warm air rises
Earth rotates
Air pressure
Jet streams
Some areas of the Earth receive more solar radiation than others. Which of the following results from the Sun's uneven heating of the Earth?
Ocean currents
Mountain height
Climate
Weather
Convection currents, which affect weather and climate, are created by
the uneven heating of the Earth.
Erosion of ocean beaches
Slow, constant tectonic movement
Mining of the sea floor
The method of heat transfer that plays a central role in transferring heat energy within the atmosphere and the ocean is
Radiation
Reflection
Convection
Conduction
What is the 2nd most abundant gas in the atmosphere, making up 21%?
Nitrogen
Oxygen
Carbon Dioxide
Water Vapor
What term refers to the sun’s energy being trapped in our atmosphere?
Transpiration
Convection
Greenhouse effect
Condensation
How does the Earth's atmosphere protect organisms on the surface from exposure to ultraviolet light?
absorbs most ultraviolet light from the Sun.
absorbs most infrared light from the Sun.
Gaseous water reflects most ultraviolet light from the Sun back into space.
Oxygen in the atmosphere scatters most ultraviolet light from the Sun.
What statement supports this statement? “There is only a fixed amount of nitrogen on Earth”
Law of Conservation of Energy
Law of Conservation of Mass
Boyle’s Law
Ohm’s Law
What organisms fix “free” nitrogen in the atmosphere?
Fungi
Plants
Bacteria
Animals
Which organisms are decomposers that help put nitrogen and carbon back into their cycles?
Fungi
Plants
Bacteria
Animals
Through which of the following processes is carbon returned to the atmosphere?
Respiration
Decomposition of organic waste
Burning fossil fuels
Photosynthesis
When the moon passes directly between the sun and Earth and blocks the sun's light, it is called a
Umbra eclipse
Lunar eclipse
Penumbra eclipse
Solar eclipse
When the Earth is directly between the Moon and the Sun, it is called a
Umbra eclipse
Lunar eclipse
Penumbra eclipse
Solar eclipse
The Moon's orbit is tilted compared to the Earth's orbit. This is why
we can see the Sun from Earth.
the Moon orbits Earth instead of orbiting the Sun.
an eclipse happens each month.
an eclipse does not happen each month.
During a solar eclipse, the Sun and the Moon look about the same size from the Earth. Which of the following explains why this is true?
The Sun is closer to Earth
The Sun is farther from Earth
The Moon is bigger than the Sun
The Moon is brighter than the Sun
Ethan often goes fishing with his uncle, and they use the rise and fall of the ocean water to determine when they will go. The ocean water rises and falls approximately every 12.5 hours. What term describes the rise and fall of the ocean water?
Eclipses
Phases
Moon
Tides
Which of the following physical processes is most frequently responsible for changes in oceanic tides?
Gravity
Erosion
Volcanic Eruption
Deposition
Why does the sun shine more directly on Earth’s Northern Hemisphere during the summer months?
The rotation of the sun makes temperatures warmer.
The Northern Hemisphere is tilted toward the sun.
The gravitational pull toward the sun is stronger in August.
Earth's orbit is nearest to the sun in the summer.
What causes temperatures in the summer to be higher than temperatures in the winter?
The greenhouse effect
Volcanic eruption
More direct sun’s rays
Earth is closer to the sun
During summer in the Northern Hemisphere,
the Sun rises earlier and sets later than during other seasons.
there are fewer hours of visible sunlight each day than during other seasons.
the Sun appears lower in the sky than during other seasons.
the Sun rises in the Southeast and sets in the Southwest.
Which are properties of transition metals?
Very low melting points
Highly reactive
Resist heat and less reactive than groups 1 and 2
Gases
Which of the following best describes the physical and chemical properties of metalloids?
They act exactly like nonmetals.
Have properties of both metals and nonmetals.
They act just like metals.
They don’t act like either metals or nonmetals.
Which of the following best describes a way in which the periodic table is organized?
Elements are organized with nonmetals on the left and metals on the right.
Elements are organized into groups with similar properties.
Elements are organized by weight with heavy elements listed above light elements.
Elements are organized in alphabetical order.
The periodic table displays
all of the known compounds that exist in the world today.
only the important compounds that exist in the world.
only the important elements that exist in the world.
all of the known elements that exist in the world today.
__________ is made up of two or more substances that are together in the same place, but each substance keeps its own properties.
Atom
Element
Compound
Mixture
Which of the following mixtures could best be separated using evaporation?
oil mixed with water
iron filings mixed with wood
salt dissolved in water
sugar mixed with salt
A mixture is made of two or more materials that
can be separated by physical means.
cannot be separated by physical means.
can only be separated by chemical means.
cannot be separated by any means.
According to the law of conservation of mass, what happens in a chemical reaction?
Matter is neither created nor destroyed, and the same amount of mass remains.
A new kind of matter is created, and the amount of mass either increases or decreases.
Matter is neither created nor destroyed, and the amount of mass may change after the reaction.
New matter is created and changes form so that the mass of the reactants and the products will almost be equal.
Which statement is true about energy changes?
Energy cannot be created or destroyed.
Energy can be created but not destroyed.
Energy can be created and destroyed.
Energy can be destroyed but not created.
Whenever energy appears in one system,
it means energy creation has outpaced energy destruction.
it means the system is suitable for creating energy.
it must be used quickly or it will be permanently lost.
it must have come from somewhere else.
What happens to the total mass of the atoms involved in a chemical reaction?
It will increase if a new compound is formed during the reaction.
It always changes as the atoms are rearranged into new molecules.
It will decrease if two molecules combine to form a single compound.
It will stay the same no matter how the atoms are rearranged.
Plants are often in a system where the matter going in and out can't be controlled or observed. What kind of system do most plants function within?
decomposition system
manufactured system
Closed system
Open system
In a lawn mower, not all of the energy stored in the gasoline is converted into the energy of motion that spins the lawnmower blade. Why?
Energy can leave an open system and enter the surroundings.
The law of conservation of energy is not obeyed by isolated systems.
An isolated system always loses energy to its environment.
The total amount of energy never changes in an open system.
Which of the following best describes energy transfer in an isolated system?
Energy is neither lost to nor gained from the system's surroundings.
Energy is both lost to and gained from the system's surroundings.
Energy is not lost to but is gained from the system's surroundings.
Energy is lost to but not gained from the system's surroundings.
Which of the following statements is true based on the law of conservation of mass?
The weight of a crushed cookie is less than the weight of a whole cookie.
A mixture weighs the same as the weight of all the parts of the mixture.
The ingredients in a salad weigh more than the salad as a whole.
A frozen ice pop weighs more than a melted ice pop.
When you push something, you must use...
Transfer
Energy
Motion
Force
When you do work, you use energy to exert a
Transfer
Energy
Motion
Force
When you do work, a force causes the object to change…
Transfer
Energy
Motion
Force
Four students are each pushing on one side of a box. Mara is pushing to the west, Cindi is pushing to the east, Chris is pushing to the north, and Sammy is pushing to the south. If the box moves to the east, which student does work on the box?
Mara
Cindi
Chris
Sammy
What does every type of wave transfer?
Color
Energy
Heat
Matter
Two sound waves (wave X and wave Y) are moving through a medium at the same speed. If wave X has a greater frequency than wave Y, then wave X
Has a longer wavelength
Has a shorter wavelength
Has a lower amplitude
Has a greater amplitude
If Garrett counts the number of waves that reach the shore over a 10-second period, what property of the waves is he measuring?
Frequency
Speed
Amplitude
Wavelength
The various types of electromagnetic radiation are distinguished from each other by their
Frequencies
Energies
Wavelengths
All of these
Water currents moving from the equator to the poles move by
Radiation
Convection
Solar
Conduction
Lava is so hot it can set a tree on fire even if the tree is several feet away from it. This phenomenon is caused by the process of
Radiation
Convection
Solar
Conduction
Sand becomes hot enough to be uncomfortable to your bare feet. However, if a wave washes over the hot sand, the cooler water removes heat from the sand by the process of
Radiation
Convection
Solar
Conduction
Which of the following is an example of convection?
the rays of the Sun warming the earth
a hot object transferring heat to a cooler one
hot air rising and cooler air falling
a hot oven warming the air around it
What are the benefits of the circuits being in parallel?
The wires follow in a line from one to the next, making it easier to replace one.
If the light in the kitchen goes out, the television in the living room will stay on.
All switches in the home have to be set to the "on" position for the toaster to work.
If too much current is running to the home, extra resistors can be added to slow it.
What is another benefit of parallel circuits?
They are more difficult to build
If the light in the kitchen goes out, the television in the living room will stay on.
Not all switches in the home have to be set to the "on" position for the toaster to work.
If too much current is running to the home, extra resistors can be added to speed it up.
As the current flows, the temperature of the resistor increases. Which of the following statements is true?
Heat energy is being converted into electrical energy in the resistor.
Light energy is being converted into electrical energy in the battery.
Electrical energy is being converted into heat energy in the resistor.
Electrical energy is being converted into chemical energy in the resistor.
Which lab tool is used to measure the electric potential difference between two points in an electric circuit?
Electroscope
Spectroscope
Voltmeter
Ammeter
Which of these living things would be responsible for releasing oxygen from the process of photosynthesis?
Parrot fish
Algae
Barracuda
Large fish
All living things need energy to perform their life processes. How and where do they get the energy that they need?
the fixation of nitrogen gas from the atmosphere
the absorption of light that radiates from the Moon
the production of carbon dioxide through the process of photosynthesis
the oxidation of food through the process of cellular respiration
The reactions of photosynthesis occur in the _______ of plant cells.
Lysosomes
Chloroplasts
Mitochondria
Chlorophyll
Sugar molecules can be oxidized in the cells of animals. This oxidation releases energy for the animal to use. From what source do the cells get these molecules?
Air
Water
Food
Sunlight
Which organism has access to the least amount of energy in an energy pyramid?
Grass
Robin
Hawk
Insects
Where does the other 90% go at each level in an energy pyramid?
Left as waste on the ground
No one knows
It is used by the organism or changed to heat
It is destroyed when the organism is eaten
As matter cycles through the Earth's reservoirs, what effect does this have on the total amount of matter on Earth?
The total amount of matter on Earth remains constant.
The total amount of matter on Earth constantly increases.
The total amount of matter on Earth constantly decreases.
The total amount of matter on Earth is always changing
Within ecosystems, energy generally flows from
secondary consumers to primary consumers.
primary consumers to secondary consumers.
primary consumers to producers.
all of these
The Arctic Circle runs through the southern tip of Greenland. In what climate zone is Greenland, and what sort of features would it have?
Polar with highlands
Polar with ice caps
Temperate and dry
Temperate and humid
The _______ biome is the largest on Earth.
polar
terrestrial
marine
Freshwater
Succulent plants have thick leaves that allow them store water. Which biome are they best suited for?
Salt water
Desert
Tundra
Freshwater
Which of the following biomes likely has the thinnest layer of topsoil?
desert
Deciduous forest
grassland
Tropical rainforest
Which of the following IS NOT characteristics of a tortoise in a desert environment that distinguish the tortoise as a living thing?
Needs food
Reproduces
Uses energy
Made of atoms and takes up space
Biotic factors are
Living or once living
Nonliving
Dead
All of the living and nonliving parts of an ecosystem
Which is made up of all abiotic factors?
Rocks, soil, earthworms
Temperature, water, soil
Lion, zebra, hyena
sunlight, grass, rain
_____ is an abiotic factor in the environment that is important for plants to make their own food.
Oxygen
Soil
Sunlight
Fertilizer
