Science

State true or false:-

NOTE:- F means false and T means true

1) All changes are reversible

2) Chemical change can be temporary

3) All reversible changes are called as physical change

4) An example of burning a wood and tapping a desk is a physical change

5) An example of the human growth is guaranteed to be an irreversible, chemical and a physical change too

• 1)T

  2)T

  3)T

  4)T

  5)T

• 1)F

  2)F

  3)T

  4)F

  5)T

• 1)T

  2)F

  3)F

  4)T

  5)F

• 1)T

  2)F

  3)F

  4)F

  5)F

• 1)F

  2)T

  3)F

  4)F

  5)F

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following changes that occur in our bodies is reversible?

• Increase in height

• Increase and decrease in weight

• Growing of nails

• None of the above

A chemical change is also known as

• Chemical process

• Chemical reaction

• Chemical activity

• Chemical specie

Tags

NGSS.MS-PS1-5

Rishabh, Anandh and Nitin are 3 friends studying at the same school. One day they had observed that a girl name Chitra and a boy named Mohanraj were doing an experiment related to Chemistry. Chitra had mixed Vinegar with eno and she had noticed that the mixture cannot come back after it was formed and as a new substance was formed she got an idea of the proper word for that, on the other hand Mohan had taken some of the ingredients needed to make a chocolate cake, after he made the cake he also got to know the proper name for that, to get the correct answers, check Rishabh, Anandh and Nitin's opinions.

• Nitin: Both are, Irreversible and chemical change.

• Anandh: Both are, chemical change.

• Rishabh: Chitra's experiment shows a physical change and Mohanraj's experiment shows an irreversible but a chemical change.

• Both Anandh's and Rishabh's are correct but Nitin is wrong

Tags

NGSS.MS-PS1-2

Which one of the following is the natural source of light?

• Electric bulb

• Sun

• Tube light

• Moon

Tags

NGSS.MS-ESS2-4

Stars are

• luminous

• non-luminous

• both of these

• none of these

Air is

• transparent

• translucent

• opaque

• both of these

Tags

NGSS.MS-PS4-2

Glass sheet is a/an

• Translucent object

• Opaque object

• Transparent object

• None of these

Substances through which light can pass partially and things cannot be seen clearly through them are
(a) transparent
(b) ccc
(c) translucent
(d) none of these

• transparent

• translucent

• opaque

• none of these

Tags

NGSS.MS-PS4-2

Which of the following is not a food?

• Pulses

• Bread

• Petrol

• Ghee