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Worksheets6th Grade Exploring Earth's Systems and Matter
Total questions: 28
Worksheet time: 14mins
Which of the following is an example of a mixture?
Table salt (NaCl)
Air
Distilled water
Gold
What is the main difference between a mixture and a compound?
Mixtures are always liquids, compounds are always solids.
Mixtures can be separated by physical means, compounds cannot.
Compounds can be separated by physical means, mixtures cannot.
Mixtures have a fixed composition, compounds do not.
Which process would best separate a mixture of sand and salt?
Filtration followed by evaporation
Melting
Magnetism
Distillation
Which of the following best describes an aqueous solution?
A mixture where water is the solvent
A mixture of two solids
A solution with no water present
A mixture of gases
If you dissolve sugar in water, what type of mixture is formed?
Suspension
Colloid
Solution
Emulsion
What causes the different phases of the Moon as observed from Earth?
The Moon's shape changes as it travels around Earth.
The Moon's distance from the Sun varies.
The Moon reflects varying amounts of sunlight during its orbit around Earth.
The Moon emits its own light.
Which of the following is responsible for causing ocean tides on Earth?
The Sun’s gravity only
The Moon’s gravity only
The combined gravitational pull of the Moon and the Sun
Earth’s rotation only
Which process transfers thermal energy from the Sun to Earth?
Conduction
Convection
Radiation
Evaporation
Which of the following is an example of conduction?
The Sun warming your face
A metal spoon getting hot in a pot of soup
Warm air rising near a heater
Water evaporating from a lake
Which of Earth’s spheres includes all living things?
Lithosphere
Hydrosphere
Biosphere
Atmosphere
How does the hydrosphere interact with the atmosphere during the water cycle?
Water evaporates from oceans into the air
Rocks are broken down by wind
Plants grow in soil
Animals breathe oxygen
Which factor most directly influences the climate of a coastal city?
Distance from the equator
Ocean currents
Amount of rainfall
Number of trees
Which of the following best describes an air mass?
A large body of air with uniform temperature and humidity
A small pocket of air above a city
A cloud formation
A type of precipitation
Which of the following is a renewable resource?
Coal
Oil
Solar energy
Natural gas
Which practice best helps conserve water resources in a community?
Leaving sprinklers on all day
Fixing leaky faucets
Washing cars daily
Filling swimming pools frequently
How can human activities negatively impact a watershed?
Planting trees along riverbanks
Dumping chemicals into streams
Building wetlands
Cleaning up trash
Which of the following is a direct human impact on the ocean?
Tides caused by the Moon
Overfishing
Ocean currents
Coral reef formation
Which weather event is most likely to cause flooding in a watershed?
Drought
Tornado
Heavy rainfall
Earthquake
How can human activities contribute to climate change?
Planting more trees
Burning fossil fuels
Using solar panels
Recycling materials
A student observes that after a hurricane, the local river is filled with debris and pollution. Which reasoning best explains the impact of this weather event on the watershed?
Hurricanes clean the river by adding fresh water.
Hurricanes increase runoff, carrying pollutants into the river.
Hurricanes have no effect on rivers.
Hurricanes decrease water levels in rivers.
Given a scenario where a city experiences a heatwave, which action would best reduce the impact on local climate?
Increasing the use of air conditioners
Planting more trees and creating green spaces
Paving more roads
Removing parks
A scientist wants to determine the effect of ocean currents on coastal temperatures. Which method would provide the most reliable evidence?
Observing the color of the ocean
Measuring water temperatures along different coasts
Counting the number of fish in the ocean
Measuring rainfall in coastal cities
A student wants to separate a mixture of iron filings and sand. Which tool should they use and why?
Filter paper, because sand is larger than iron filings
Magnet, because iron filings are magnetic
Evaporation dish, because iron filings dissolve in water
Sieve, because iron filings are smaller
Which of the following best explains why the Sun appears to rise in the east and set in the west?
The Sun moves around the Earth each day.
The Earth rotates from west to east.
The Earth rotates from east to west.
The Sun rotates on its axis.
A student observes that the temperature of a metal rod increases when one end is placed in a flame. Which process is responsible for this temperature change?
Convection
Radiation
Conduction
Evaporation
Which of the following best describes the HR diagram used in astronomy?
A chart that shows the phases of the Moon
A graph that plots stars according to their brightness and temperature
A map of the solar system
A timeline of Earth’s history
If a star is located in the upper left corner of the HR diagram, what can you infer about its properties?
It is cool and dim.
It is hot and bright.
It is cool and bright.
It is hot and dim.
A student is given a sample of saltwater and asked to obtain pure water from it. Which method should they use and why?
Filtration, because salt will stay in the filter
Distillation, because water can be evaporated and condensed
Magnetism, because salt is magnetic
Decanting, because water is less dense than salt
