Yr7 How Science Works

This question is on LAB SAFETY.
Drag and drop the behaviours in to the correct category

Groups:

(a) DO this

,

(b) Do NOT do this

• Throw/catch things

• Put your fingers in your mouth

• Sit at your desk

• Run or walk quickly

• Speak quietly

• Coats on the table

• Leave your practical unattended

• Be aware of your surroundings

• Talk loudly or yell across the lab

• Bags under the table

• Quickly wipe up spills

• Tuck or remove your tie and loose clothing

• Wash your hands at the end of a practical

• Walk away from your station

• Wear safety goggles

• Tell the teacher if you break glass

• Touch your eyes

• Tie your hair

• Eat & drink

• Follow instructions carefully

What is the BLUE flame of the Bunsen burner called?

• Rising flame

• Roaring flame

• Searing flame

• Safety flame

What is the YELLOW flame of the Bunsen burner called?

• Rising flame

• Roaring flame

• Searing flame

• Safety flame

Label the parts of the Bunsen burner

i

g

f

e

d

c

Safety flame

Collar

Roaring flame

Air hole (open)

Tubing

Air hole (closed)

Pipe

Base

Chimney

Reorder the steps to turn ON a Bunsen burner

• 
  Rotate the collar to close the air hole

• 
  Turn on the gas tap

• 
  Rotate the collar to open the air hole

• Use this flame to heat a substance

• Place the lit splint over the Bunsen burner

How do you turn OFF a Bunsen burner

• Blow on the flame to turn it off

• Rotate the collar till the flame is not visible

• Turn off the gas tap

• Disconnect the tube

Match the following Variables

• The thing you change

• Dependent Variable

• The things you keep the same

• Independent Variable

• The thing you measure

• Control Variable

James stores yoghurt at different temperatures and measures how long it takes for mould to appear on them

• Amount of yoghurt (ml)

• Independent Variable

• Time for mould to appear (s)

• Dependent Variable

• Temperature (^oC)

• Control Variable

Jenny attaches a weight to a piece of string. She changes the length of the string and records how long each pendulum takes to complete 5 full swings.

• Weight (g)

• Dependent Variable

• Length of string (cm)

• Independent Variable

• Time it takes for 5 full swings (s)

• Control Variable

Jo drops a marble from different heights on to sand. The width of the crater formed in the sand is measured. The results are used to decided which height created the widest crater.

• Width of crater (mm)

• Independent Variable

• Height (cm)

• Control Variable

• Size of marble

• Dependent Variable