Adolescence: A Stage of Growth and Change — Science STD 7 — Question

Does an acidic solution conduct electricity?

Paheli says her mother puts Jadyfinger and other vegetables in water if they are some what dry. She wants to know how water enters into them.

Which colour is given by the red rose extract in the basic solution?

Name a metal used for making musical instruments.

Name the parts of the alimentary canal where: Bile juice is produced.

Fill in the blanks.

The rhythmic expansion and contraction of the heart is called ______.

State whether the following statement are true or false.
Anaerobic bacteria digest animal waste produce biogas.

Give an example to show the transfer from heat from one body to another.

Note the changes in shape, size or state : Cooking of food

Name the device which is used to record the speed directly in km/h in vehicles.