Azsci

A series of steps used by scientists to solve a problem or answer a question is called a ___________.

• scientific method

• recipe

• data collection

• metric system

What's the correct sequence for carrying out a scientific method?

A) planning an experiment

B) identifying the problem / asking a question

C) making conclusions

D) collecting data and recording it in a table

• A, C, B, D

• B, A, D, C

• C, D, B, A

• D, C, B, A

Kumar carried out an experiment to test if a shirt hung indoors takes a longer time to dry compared to one that was dried outdoors. What is the independent variable here?

• location where shirt dries

• size of shirt

• time taken for shirt to dry

• volume of water in shirt

Answer explanation

Independent variable if the condition that you CHANGE to test a hypothesis in an experiment.

Kumar carried out an experiment to test if a shirt hung indoors takes a longer time to dry compared to one that was dried outdoors. In this experiment, the DEPENDENT variable is the ______.

Ahmad was given two pots of identical balsam plants by his parents. He put one in the garden under direct sunlight and the other inside his bedroom with little sunlight. He observed that the plant in the garden has grown taller compared to the one in his bedroom.

What variable should remain CONSTANT?

• type of balsam plants

• height of balsam plants

• amount of sunlight

• location of plant

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Which statement is NOT true about a Bunsen burner?

• The airhole must be closed when lighting the Bunsen burner.

• When not in use, the flame should be luminous.

• The blue non-luminous flame of the Bunsen burner is cooler than the orange luminous flame.

• The Bunsen burner must always be placed on a heatproof mat.

Tags

NGSS.MS-ETS1-1

NGSS.MS-PS3-4

What does this symbol tell us about a chemical?

• Toxic

• Irritant

• Flammable

• Biohazard

Tags

NGSS.MS-PS1-2

The part labelled A is the _____.

Hydrochloric acid is burns through surfaces and skin. Which symbol should be placed on a bottle of hydrochloric acid?

• 
• 
• 
• 

Name the apparatus.

• retord stand

• retort stand

• tripod stand

• retod clamp