Obtaining useful materials

In an endothermic reaction, energy is _________.

• absorbed

• released

Tags

NGSS.HS-PS1-4

The graph above is from which type of reaction?

• Endothermic reaction

• Exothermic Reaction

Tags

NGSS.HS-PS1-4

If a chemical reaction is EXOTHERMIC, the temperature would....

• Stay the same
• Increase
• Decrease

Tags

NGSS.HS-PS1-4

If the energy transferred to the surroundings during bond making process is higher than the energy absorbed during the bond breaking process, the reaction is

• endothermic

• exothermic

• catalyst

• powerful

How does a catalyst work in speeding up a reaction?

• By lowering the activation energy or reaction

• by giving them more energy

• by making them more available

What is the name given to a catalyst in the human body?

• Saliva

• Lipid

• Enzyme

• Catalyst

Which of the reaction pathway shows the catalysed reaction?

• red curve

• blue curve

Proteins are composed of what smaller subunits?

• amino acids
• nucleic acids
• fatty acids
• nucleotides

Define polymer

• circular molecule made with many repeating units

• short molecule made of a few repeating units

• long, chain-like molecule made of repeating units

• chain-like molecule that contains hydrogen and oxygen

The properties of ceramics include...

(select more than one answer)

• electrical insulators

• hard

• brittle

• magnetic

• non toxic