Concrete

Medjie went swimming during the summer. As she was walking around the pool, her feet got very hot. What is the reasoning that explains this?

• The concrete is transferring heat to his feet.

• Heat is passing from his feet to the concrete.

• His feet and the concrete are the same temperature.

• His feet have a higher temperature than the concrete.

Tags

NGSS.HS-PS3-4

What is the primary component of concrete?

• Cement

• Sand

• Gravel

• Water

Which of the following is a chemical reaction involved in the hardening of concrete?

• Hydration

• Oxidation

• Reduction

• Sublimation

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

What role does water play in the concrete mixture?

• Acts as a catalyst

• Dissolves cement

• Initiates hydration

• Increases volume

Which property of concrete makes it suitable for construction?

• High tensile strength

• High compressive strength

• High ductility

• High elasticity

What is the typical pH level of fresh concrete?

• 3-4

• 5-6

• 7-8

• 12-13

Which of the following materials is often added to concrete to improve its tensile strength?

• Steel fibers

• Plastic fibers

• Wood chips

• Glass beads

What is the environmental impact of concrete production?

• High carbon dioxide emissions

• Low energy consumption

• No waste production

• Carbon neutral

Tags

NGSS.HS-ESS3-4

NGSS.HS-ETS1-3

NGSS.HS-LS2-7

How does temperature affect the curing process of concrete?

• Higher temperatures speed up curing

• Higher temperatures slow down curing

• Temperature has no effect

• Curing is only affected by humidity

Tags

NGSS.HS-PS1-5

What is the term for the process of concrete gaining strength over time?

• Curing

• Aging

• Setting

• Hardening