Reversible and Irreversible Changes

What change of state is shown in the picture?

• Solid to gas

• Solid to liquid

• Gas to liquid

• Liquid to solid

Tags

NGSS.MS-PS1-4

When the temperature drops, icicles can form. Which change of state results in the formation of icicles?

• melting

• evaporation

• freezing

• condensation

Answer explanation

The formation of icicles from water is an example of the physical change of state known as freezing. Freezing is the process by which a liquid changes into a solid when its temperature is lowered below its freezing point.

Tags

NGSS.MS-PS1-4

To make coffee, water is heated in a tea kettle. Which change of state occurs in the teakettle?

• melting

• freezing

• evaporation

• condensation

Answer explanation

Heating water in a tea kettle results in a change of state from liquid to gas or vapor called evaporation, through the process of boiling or vaporization.

Tags

NGSS.MS-PS1-4

It's time for a science joke!

See if you can answer the question:

What do solids, liquids and gases have in common?

Evaluate responses using AI:

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Answer explanation

They all have mass and volume: This means that they take up space and have a certain amount of weight.

They can be measured.

Solids, liquids, and gases are all made up of tiny particles (atoms or molecules), which are in constant motion.

Tags

NGSS.5-PS1-1

 Sally works in a waste management company and her team sorts the waste into two categories.

 Mention the possible reason for sorting the waste.

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Answer explanation

Overall, sorting waste is an important process that can help reduce the amount of waste that goes to landfills, conserve natural resources, and protect the environment.

Tags

NGSS.MS-ESS3-3

NGSS.MS-ETS1-1

Threat to environment:

• Plastic Waste

• Waste separation

• Reduce, Reuse and Recycle

• Stainless steel

Tags

NGSS.MS-ESS3-3

NGSS.MS-ESS3-4

Eco Friendly material:

• Plastic Waste

• Waste separation

• Reduce, Reuse and Recycle

• Stainless steel

Tags

NGSS.MS-ESS3-3

NGSS.MS-ESS3-4

NGSS.MS-PS1-3

Three R’S:

• Plastic Waste

• Waste separation

• Reduce, Reuse and Recycle

• Stainless steel

Tags

NGSS.MS-ESS3-3

NGSS.MS-ESS3-4

Biodegradable, recyclable and non recyclable:

• Plastic Waste

• Waste separation

• Reduce, Reuse and Recycle

• Stainless steel

Tags

NGSS.MS-ESS3-3

NGSS.MS-PS1-3

Imagine you are at the beach with your friends, and you notice a lot of plastic bottles and bags on the sand and in the water.

Why are these plastic bottles and bags dangerous for our environment?

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Tags

NGSS.MS-ESS3-3

NGSS.MS-LS2-4