Observing Change

When a substance is melted it changes from __________ to __________

• gas to liquid

• liquid to gas

• solid to gas

• solid to liquid

Tags

NGSS.MS-PS1-4

A physical change can be reversed? T or F

• True

• False

A burning match is an example of a ___________ change

• chemical

• physical

Tags

NGSS.MS-PS1-2

What are the the correct criteria for a chemical change?

• It is easily reversible and energy is released or absorbed

• A new substance is formed and energy is released or absorbed

• No new substance is formed and energy is released or absorbed

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What does this definition describe:

chemicals that combine to produce a new substance

• reactants

• reagents

• products

Tags

NGSS.MS-PS1-5

Check the boxes that relate to what happens during a chemical reactions

• light is emitted

• bubbles of gas appear

• colour change

• temperature drops

Tags

NGSS.MS-PS1-2

Wax melting is an example of a _______ change

• physical

• chemical

The making of plastic involves which substance?

• water

• oil

• gas

• wind

Tags

NGSS.MS-PS1-3

The process of making plastic is an example of a _______ reaction

• physical

• chemical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What energies does an old fashioned lightbulb emit? Select 3

• Heat

• Kinetic

• Sound

• Light