1.7 Post Test (Mod)

Select ALL the correct answers. Which of these are chemical reactions?

• boiling an egg

• vegetables rotting

• crushing spices

• chopping vegetables

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Match the chemical reaction with its property: Oxygen is a reactant, and a large amount of energy is released.

Match the chemical reactions with their properties. The products are always salt and water.

Lisa eats eggs for breakfast. This is an example of (a)   .

• combustion reaction
• respiration

Tags

NGSS.MS-LS1-7

Select ALL the correct answers. Which factors make hydrogen fuel cells better than burning fossil fuels?

• Hydrogen fuel cells have a higher energy efficiency.

• Hydrogen fuel cells create less pollution.

• Burning fossil fuels relies on outdated devices and technology.

Tags

NGSS.HS-ESS3-2

NGSS.HS-ESS3-4

NGSS.HS-ETS1-3

Classify Brass as an alloy or a ceramic.

Synthetic polymers affect the environment by (a)  

• They sometimes release toxins into
• They can end up as waste products t
• They always decompose quickly and s
• They are always beneficial to marin

Select ALL the correct answers. Which three statements are true about all alloys?

• They’re harder than the pure metals they’re made of.

• They have a metal as their main component.

• They’re brittle and prone to cracking.

Label the parts of the reaction.

a

b

Reactants

Products

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is an alloy?

• a homogeneous mixture

• an element