Grade 8 SCIENCE UNIT A COMMON ASSESSMENT REVIEW

Which is a poor safety practice?

• washing hands thoroughly after using chemicals

• removing goggles when recording data during an experiment

• reporting immediately and safety issues or concerns

• wearing gloves when using toxic substances

If an item falls on the floor and breaks, what should you do?

• put safety goggles on

• use a vacuum to clean up the glass

• report the accident immediately to the teacher

• pick up the pieces with your hands

A pneumatic system uses _______________ under pressure to move loads.

• air

• oil

• water

Symbol 4 is what type of hazard?

• compressed gas

• oxidizing material

• immediate serious toxic effects

• corrosive material

Symbol 8 is what type of hazard?

• compressed gas

• flammable

• immediate serious toxic effects

• corrosive material

Symbol 1 is what type of hazard?

• compressed gas

• oxidizing material

• immediate serious toxic effects

• poison

What is solubility?

• maximum solvent dissolved at a given temperature

• maximum solute that can be added to a fixed volume and temperature

• maximum temperature of a solvent

• minimum temperature of a solvent

Fluids in the oil sands are known as _____________.

• slush

• mush

• slurry

• solids

If I want to clean a classical painting, I would use a fluid that is ___________________ with the paint?

• Soluble

• Insoluble

• aqueous

• dissolved

Andreas added kool-aid crystals to water. The kool-aid crystals are an example of ________________.

• solvent

• solution

• gas

• solute