Semester 1 Exam Review 2024-2025

What is the primary purpose of wearing safety goggles in a science lab?

• To look cool

• To protect your eyes from harmful substances

• To improve your vision

• To keep your hair out of your face

Which of the following should you NOT do when handling chemicals in the lab?

• Read the labels carefully

• Wear protective gloves

• Taste a small amount to identify it

• Use a fume hood when necessary

What is a beaker primarily used for in a science lab?

• Measuring precise volumes of liquids

• Heating substances over a flame

• Holding and mixing liquids

• Separating liquids of different densities

If a fire breaks out in the lab, what should you do first?

• Open all windows

• Alert the teacher or supervisor

• Try to extinguish it yourself

• Run out of the room immediately

Which piece of lab equipment is used to transfer small amounts of liquid accurately?

• Test tube

• Bunsen burner

• Pipette

• Thermometer

How many millimeters are in 2.5 meters?

• 25 mm

• 250 mm

• 2,500 mm

• 25,000 mm

Which of the following is equivalent to 0°C?

• 25°F

• 273.15 K

• 0°F

• -273.15 K

How many kilograms are in 4,500 grams?

• 0.45 kg

• 4.5 kg

• 45 kg

• 450 kg

What is the Kelvin equivalent of 50°C?

• 223.15 K

• 323.15 K

• 373.15 K

• 423.15 K

Which of the following is closest to 1 liter?

• 100 mL

• 10,000 cL

• 1,000 cm³

• 10 dL