Lesson 4: Bioengineering

What does all matter have in common?

• It is liquid at room temperature
• It is made up of atoms
• It is neutral

How do ionic bonds form?

• Positive and negative ions are attracted to one another
• Because they feel like it

• When positive and positive ions come together

Which statement best describes compounds?

• Compounds are collections of several atoms of the same element.
• Compounds are made up of atoms of one or more elements bonded together.
• Compounds are composed of atoms that are not likely to react with one another.

Which of the following are examples of matter? Select all correct answers.

• heat
• sunlight
• water
• grass
• air

How do temperature and pH affect an enzyme that a chemical reaction depends on?

• They can break down reactants
• They can break down products
• They can change the shape of the enzyme.

Define chemical reaction

• Chemical reactions change substances into different substances by breaking chemical bonds and forming new chemical bonds.
• Chemical reactions are when people look at each other and smile

Which statement is true regarding a catalyst?

• A catalyst increases the activation energy for a chemical reaction.
• A catalyst allows the reactants to start at a higher energy level.
• A catalyst lowers the activation energy for a chemical reaction.

Is the graph depicting an exothermic or endothermic chemical reaction?

• Endothermic
• Exothermic