Unit 1 Chemistry Test

What is the purpose of lab safety in a chemistry lab?

• To encourage collaboration among lab members.

• To ensure cleanliness in the lab.

• To prevent accidents, injuries, and exposure to hazardous substances.

• To promote efficient use of lab equipment.

Why is it important to wear protective clothing and goggles in a chemistry lab?

• To protect oneself from potential chemical spills, splashes, and fumes.

• To avoid getting dirty or stained clothes.

• To keep up with the lab fashion trends.

• To look professional and serious in the lab.

What is the SI unit for measuring mass in chemistry?

• liter (L)

• milligram (mg)

• meter (m)

• kilogram (kg)

What is the SI unit for measuring temperature in chemistry?

• Kelvin

• Mole

• Fahrenheit

• Meniscus

What is the difference between a physical change and a chemical change?

• A physical change involves a change in temperature, while a chemical change does not.

• The difference between a physical change and a chemical change is that a physical change does not result in the formation of new substances, while a chemical change does.

• A physical change can be reversed, while a chemical change cannot.

• A physical change only affects the appearance of a substance, while a chemical change alters its composition.

Give an example of a physical change.

• Copper turning green.

• Burning wood into ash.

• Melting ice into water

• Mixing salt and water to form a solution.

Give an example of a chemical change.

• Burning of wood

• Cutting a piece of paper

• Mixing of salt and water

• Melting of ice

What are some indicators of a chemical change?

• Change in odor, change in texture, change in taste

• Formation of a precipitate, change in color, release of gas, production of heat or light

What is the SI unit for measuring volume in chemistry?

• liter (L)

• kilogram (kg)

• kelvin (K)

• meter (m)

15.6 L = ___________ mL

• 15,600
• 156,000
• 1,560,000
• 15,600,000