6th Grade Exploring Earth's Systems and Matter

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.

Tags

NGSS.MS-ESS1-1

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

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Which of Earth’s spheres includes all living things?

• Lithosphere

• Hydrosphere

• Biosphere

• Atmosphere

Tags

NGSS.MS-LS2-3