Unit 1 Reassessment Pre-test

There is an unknown chemical in the lab. How can you safely figure out what the chemical is? (Hint: by smelling)

• Smell the chemical directly

• Use a wafting technique to smell

• Taste the chemical

• Ignore the chemical

What is this lab equipment called and used for?

• Beaker - used for mixing and heating chemicals

• Microscope - used for viewing small objects

• Bunsen burner - used for heating substances

• Graduated cylinder - used for measuring liquid volumes

Is this bullseye accurate, precise, both, or neither?

• Accurate

• Precise

• Both

• Neither

What is the average of these measurements? 1cm, 2cm, and 3cm.

• 1cm

• 2cm

• 2.5cm

• 2cm

Convert 75 C to Kelvin. Using K = C + 273.

• 348 K

• 350 K

• 345 K

• 340 K

What is the SI unit for time?

• Seconds

• Minutes

• Hours

• Days

Convert 35mm to km. Use King Henry Died By Drinking Chocolate Milk

• 0.000035 km

• 0.00035 km

• 0.0035 km

• 0.035 km

How long is the red line in cm?

• 12 cm

• 14 cm

• 16 cm

• 18 cm

How many inches are in 3 ft? Use 12 in = 1 ft.

• 24 inches

• 36 inches

• 48 inches

• 30 inches

Put 345,000,000 into scientific notation.

• 3.45 x 10^8

• 34.5 x 10^7

• 3.45 x 10^7

• 345 x 10^6