5Rs Waste Management

Which shows physical change?

• burning of gasoline

• digestion of food

• mixing of salt and water

• photosynthesis of plants

Which shows chemical change?

• liquid salt to table salt

• melting of crayons

• vaporization of water

• burning of coals

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Which is TRUE?

• In some cases, heat is emitted when a material undergoes chemical change

• Energy is emitted when water is turned into ice.

• Sound is produced when evaporation of liquid happens .

• Gas is produced when a material melts .

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Why is decomposition considered a chemical change ?

• Decomposition enables the bodies of dead organisms to decay.

• Decomposition reduces the size of the dead organisms to decay.

• Decomposition emits gas a by product known as methane

• Decomposition allows nutrients to be recycled.

Tags

NGSS.MS-PS1-5

NGSS.MS-LS2-3

Which is NOT true?

• The North Pole will melt in the near future when global warming continues.

• The freezers of our refrigerators preserve the food that we eat.

• Smoke- belching vehicles release carbon monoxide that contributes the formation of acid rain.

• The atmosphere in general protects the earth from UV radiation.

Tags

NGSS.MS-ESS3-4

NGSS.MS-ESS3-5

Which pair is CORRECT?

• melting :molding metals

• solidification:formation of water droplets

• sublimation

• evaporation:flooding

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What can be done to stop ozone depletion?

• Stop burning garbage as they may release fumes that are poisonous.

• Stop the use of products that contain CFCs and Freon gas.

• Stop burning fossil fuels like gasoline.

• Stop polluting the air because it is a part of the atmosphere.

Tags

NGSS.MS-ESS3-4

Which is the BEST describes " reusing" materials?

• Reusing means reprocessing materials in order tio make them new .

• Reusing means using products that contain CFCs and Freon gas.

• Reusing means reducing waste materials.

• Reusing means fixing materials

Which BEST describes "repairing " materials

• Repairing means reprocessing materials to make them new.

• Repairing means using products "as is ."

• Repairing means reducing waste materials.

• Repairing means fixing materials

Tags

NGSS.MS-ESS3-3

Which of the following is not an example of chemical change?

• burning paper

• digestion

• butter melting

• metal reacting to acid

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2