Lab safety and science tools

Grade 6 Science Worksheet - Challenge Me

Circle the best answer.

1. Read this first

   Lab card

   Step 1: pour 100 mL of water into a heat-safe glass; Step 2: heat it on the hot plate alone, no goggles; Step 3: sniff the steam up close; Step 4: record what happens.

2. 1.

   Esme's lab card for warming sugar water has two safety problems. Which fix covers both?

   • Goggles and an adult for step 2; waft in step 3
   • Add an adult; sniffing the steam is fine
   • Remove step 4, since recording is not part of safety
   • Add goggles; the rest is fine as written

3. Lab card

   Step 1: put on goggles; Step 2: pour vinegar into a cup of baking soda; Step 3: if it bubbles over, wipe it with a sleeve; Step 4: taste the bubbly mix.

4. 2.

   Which fix makes Jun's baking-soda lab card safe?

   • Step 3: tell the teacher; step 4: no tasting
   • Skip step 1 to save time
   • Fix step 3; a small taste is fine
   • Fix step 4; a sleeve works fine for wiping up spills
5. 3.

   Step 1: carry the microscope by the eyepiece; Step 2: start with the 40× objective. Kira's microscope card says: carry it by the eyepiece, then start with the 40× objective. Which fix is right?

   • Start on 40× to see the most from the start
   • Carry it by the eyepiece, since that part sits on top
   • Carry it by arm and base; start on the lowest power
   • Focus with the coarse knob at 40×
6. 4.

   Luz's friend says goggles are just for labs with flames. Which response is best?

   • Agree: water labs do not need goggles
   • Agree: goggles are just for show
   • Disagree: goggles are for liquids, heat and splashes too
   • Disagree: goggles are for outdoor work and sports, not labs
7. 5.

   Milo's cousin says small lab spills are fine to ignore. Which response is best?

   • Disagree: a spill should be smelled up close first
   • Agree: clean it alone without telling anyone
   • Agree: small spills cause no trouble
   • Disagree: tell the teacher about every spill
8. 6.

   Ren wants to describe how vinegar smells. Which plan is safe?

   • Taste a drop to compare it
   • Sniff straight from the bottle
   • Goggles on, then waft the air toward the nose
   • Pour some on a hand and sniff it
9. 7.

   A lab is over and a little water spilled. Which clean-up order should Tala follow?

   • Wash hands, then leave the spill for later
   • Take goggles off before pouring liquids away
   • Report the spill, put tools away, wash hands
   • Have a snack first, then clean up
10. 8.

    Zee needs 30 mL of water. Which tool and reading are right?

    • A graduated cylinder, read looking down from above
    • A graduated cylinder, filled until the edges touch 30 mL
    • A thermometer, read at the 30 mark
    • A graduated cylinder, curve bottom on 30 mL at eye level
11. 9.

    Water reads 37 mL at the bottom of its curve (edges 38 mL). Ari adds a small rock; it now reads 52 mL. What is the rock's volume?

    • 15 mL
    • 52 mL
    • 14 mL, using the edges
    • 89 mL
12. 10.

    Bo sees a leaf cell at 100× with a 10× eyepiece and wants 400×. What should Bo do?

    • Switch to the 4× objective
    • Hold the eyepiece farther from the eye
    • Switch to the 40× objective
    • Turn the coarse knob at high power